JP5551652B2 - Bending-yield elastic-plastic damper - Google Patents

Description

  The present invention is installed in such a manner as to straddle between separated structural members that can cause relative deformation when a horizontal force is borne by an earthquake, wind load, etc. inside or outside the structure, and mainly receives a shearing force as an external force. The present invention relates to a bending yield type elasto-plastic damper.

  An elastic-plastic damper of the type in which the plate-shaped main body is deformed by receiving a shearing force in the in-plane direction, and the middle part in the direction perpendicular to the direction of the shearing force is bent and yielded. It is installed across the structural members by being joined to the structural members that are separated from each other at the joint located at the position. In this installed state, the elasto-plastic damper receives a horizontal force in the in-plane direction as a shearing force in accordance with the relative deformation (relative displacement) between the structural members. The deformed portion undergoes shear deformation or shear deformation with bending deformation, and absorbs vibration energy by shear yield or bending yield (see Patent Documents 1 to 3).

  The elastoplastic dampers of Patent Documents 1 and 2 are formed with hexagonal holes or openings (openings) having a shape similar to the hexagonal shape in the plastic deformation portion, which is an area where shear deformation or bending deformation occurs. Since it has a shape corresponding to the bending moment distribution when subjected to a shearing force, it has the advantage that it can yield uniformly by the bending moment over the entire height in the direction perpendicular to the direction of the shearing force. Since any damper has a hole formed in the yield region, it tends to bend and yield with a bending moment rather than a shearing force.

  However, when a hole is formed in the yield region, the yield strength is lower than when there is no hole, so it is easy to plasticize with a smaller force than when there is no hole, and the deformability after yielding Can be expected. For this reason, when a relatively large yield strength is required for the damper, it is necessary to increase the amount of steel used including the joint portion in order to increase the strength, which increases the manufacturing cost.

  On the other hand, the yield strength of the shear yield type damper, which has a strong tendency to yield with a shearing force rather than the bending moment as in Patent Document 3, is higher than that of the bending yield type damper. If attention is paid only to the damper portion, it is possible to give a relatively large deformation capacity without increasing the amount of steel used.

Japanese Unexamined Patent Publication No. 1-190880 (FIGS. 1 to 6) JP-A-1-203543 (FIG. 1, FIG. 6, FIG. 9, FIG. 10) Japanese Unexamined Patent Publication No. 2000-73495 (paragraphs 0009 to 0011, FIGS. 1 and 6)

  However, like the damper shown in FIG. 2- (a) in which the dampers of Patent Documents 1 and 2 are simplified, they are joined to both sides in the direction (Y direction) perpendicular to the shearing force acting direction (X direction) of the plastic deformation portion. In a damper having a portion, the bending moment Ma generated in the joint portion is more than the bending moment Mb generated in the plastic deformation portion by arranging the joint portion and the plastic deformation portion in series in the direction perpendicular to the shearing force acting direction (Y direction). growing. As a result, there is a possibility that the transmission capacity of the bending moment Mb to the structural member may be impaired by receiving the bending moment before the plastic deformation portion yields. Measures may be required to increase moment transmission capacity.

  In the damper shown in FIG. 2- (a) where the joints are located on both sides in the Y direction of the plastic deformation portion, the bending moment is applied to the plastic deformation portion when the shear force is applied, as shown in FIG. They are distributed in a triangular shape symmetrically with respect to an axis that faces a direction (Y direction) perpendicular to the (X direction). Hereinafter, for convenience, the “direction perpendicular to the shearing force acting direction (Y direction)” may be referred to as the “axial direction of the plastic deformation portion”.

  When a shearing force acts in the X direction on the damper shown in FIG. 2- (a), the bending moment is from the center in the direction perpendicular to the shearing force acting direction (Y direction: axial direction of the plastic deformation portion) to the joints on both sides. Therefore, the bending moment of the joint becomes larger than the plastic deformation portion, and it is necessary to give the joint a strength and rigidity that can resist this bending moment. As shown in FIG. 2B, the maximum value of the bending moment Ma generated in the damper appears at the end of the joint in the axial direction (Y direction) of the plastic deformation portion, and the bending moment generated at the end of the plastic deformation portion. Greater than maximum value Mb. Ma in FIG. 2- (b) indicates the bending moment at the Y direction intermediate part (center) position in the joint.

  Further, as shown in FIG. 2A, an elevational shape in which the plastic deformation portion and the joint portion are arranged in series in a direction perpendicular to the shearing force acting direction (X direction) (axial direction of the plastic deformation portion: Y direction). When the damper is manufactured from, for example, one rectangular steel material (steel plate), unnecessary portions (regions) are cut and removed from both sides in the width direction of the plastic deformation portion in order to leave the plastic deformation portion and the joint portion. become. In this case, the unnecessary portion becomes a pentagonal region, but this region accounts for a large proportion of the area of the original steel material, and the ratio of the amount of steel material required to manufacture one damper to the raw steel material Manufacturing efficiency is low.

  From the above background, the present invention reduces the magnitude of the bending moment acting on the joint while reducing the scale of the damper itself including the joint while having the same deformation capacity as the plastic deformation part of the conventional damper. A bending yield type elasto-plastic damper is proposed.

The bending yield type elasto-plastic damper of the invention according to claim 1 is a plate-like elasto-plastic damper that is installed straddling between structural members separated from each other, deforms by receiving a shearing force in the in-plane direction, and bends and yields. Yes,
A plastic deformation part that is located at or near the center of the plate-like main body and can be bent and yielded by bearing the shearing force, and located on both sides of the plastic deformation part in a direction perpendicular to the shearing force acting direction. And three portions of a connecting portion connected to each structural member,
Each of the connecting portions has joints that are distributed and located on both sides of the shearing force acting direction of the plastic deformation part. It is assumed that it is located in

  As shown in FIG. 1- (a), the “central part of the main body” means that the whole main body 1A (elevated surface) of the elastic-plastic damper (hereinafter referred to as a damper) 1 is in the direction of shearing force (X direction) and the direction perpendicular thereto. When viewed in two directions (Y direction), it is divided into two directions: an intermediate section in the shearing force acting direction (X direction) and an intermediate section in the direction perpendicular to the shearing force acting direction (Y direction). A region with a certain area. In FIG. 1- (a), as in FIG. 2- (a), in the main body 1A, a region like a drum shape in which two approximate trapezoids are combined symmetrically in the Y direction with respect to a line in the X direction is “ “Plastic deformation part 2” which is “the central part of the main body 1A” is shown.

  The central region when the entire damper 1 body 1A is viewed in two directions is the “plastic deformation portion 2”. In FIG. 1- (a), the elevational shape corresponding to the bending moment distribution shown in FIG. The plastic deformation portion 2 ”is formed (claim 3). The shearing force acting direction (X direction) means a direction orthogonal to the direction in which the separated structural members 6 and 6 are opposed, on which the damper 1 is straddled as shown in FIGS. When the relative deformation occurs between the structural members 6 and 6 with this direction straddling between the structural members 6 and 6 where the damper 1 is separated, a shearing force in the surface of the main body 1A acts on the damper 1. Direction (X direction), which is a direction in which the “plastic deformation portion 2” is deformed (deformation direction), or a width direction.

  The “plastic deformation part 2” receives the shearing force in the X direction acting between the “connecting parts 3 and 3” located on both sides in the direction perpendicular to the shearing force acting direction (Y direction). As shown in b), a bending moment distributed alternately in a triangular shape on both sides in the X direction with respect to the axis facing the Y direction, which is the central axis of the “plastic deformation portion 2”, is borne. From this, it is reasonable that the “plastic deformation portion 2” is formed in an elevational shape corresponding to the bending moment distribution so that bending yield occurs evenly in the axial direction facing the Y direction. . “The bending yield occurs evenly in the axial direction” means that the bending stress (σ = M / Z) in each part in the axial direction becomes equal in the axial direction.

  As shown in FIG. 1B, the bending moment distribution generated in the “plastic deformation portion 2” has the minimum center in the axial direction (Y direction) of the “plastic deformation portion 2” and the end portion in the axial direction (Y direction). A linear distribution that maximizes. As shown in FIG. 1- (a), the elevation shape corresponding to this bending moment distribution has a minimum width in the X direction at the axial center position (Y direction) of the “plastic deformation portion 2”. Becomes a shape like a drum shape in which two roughly trapezoidal shapes are gradually increased toward the end in the axial direction (Y direction).

  When the “plastic deformation part 2” is formed in an elevational shape corresponding to the bending moment distribution (Claim 3), bending yielding occurs evenly in each cross section in the axial direction (Y direction) of the “plastic deformation part 2”. Since the energy absorption capability can be exhibited over the entire length of the “plastic deformation portion 2”, there is an advantage that the energy absorption efficiency and the energy absorption capability are high.

  The direction in which both structural members 6, 6 face each other when the “plastic deformation portion 2” receives a shearing force in the X direction acting between “connecting portions 3, 3” located on both sides in the axial direction (Y direction). When relative deformation in the direction (X direction) perpendicular to (Y direction) occurs, the damper 1 undergoes shear deformation as shown in FIG. 5B, or undergoes shear deformation with bending deformation. This tries to follow the relative deformation between the structural members 6 and 6.

  “The connecting portions 3 and 3 are positioned on both sides of the direction perpendicular to the shear force acting direction with respect to the plastic deformation portion 2” means that the center in the direction (Y direction) perpendicular to the shear force acting direction (X direction), “Connecting portions 3, 3” are located on both sides in the axial direction with respect to the “axial direction (Y direction) center” of the “plastic deformation portion 2”. The term “near both sides” means that the “connecting portions 3 and 3” are distributed “on both sides in the axial direction” with respect to the “axial direction (Y direction) center of the plastic deformation portion 2”. It does not mean that it is biased toward both ends.

  Further, in “the connecting portions 3 and 3 are located on both sides in the direction (Y direction) perpendicular to the shearing force acting direction of the plastic deformation portion 2 (the deformation direction of the plastic deformation portion 2 or the width direction: X direction)” “Connecting portions 3, 3” refers to two connecting portions 3, 3 that are attached to one damper 1 and are located closer to both sides in the axial direction (Y direction) of “plastic deformation portion 2”. If one (1) damper 1 is roughly divided into “plastic deformation portion 2” and “connection portions 3 and 3”, “connection portions 3 and 3” are “plastic deformation portion 2” in one damper 1. "Is located on both sides of the" axial direction (Y direction) ". Since the “connecting portions 3 and 3” are positioned on both sides of the “plastic deformation portion 2” in the “axial direction (Y direction)”, the damper 1 is largely positioned on both sides of the “plastic deformation portion 2” and its axial direction. It consists of three parts of two (two) "connection parts 3, 3".

  Furthermore, “each connecting portion 3 has joint portions 31, 31 that are distributed and located on both sides of the shearing force acting direction (X direction) of the plastic deformation portion 2” means “the plastic deformation portion 2” in the axial direction ( (Y direction) Each of the “connecting portions 3” located closer to both sides is distributed in two places on both sides of the deformation direction (width direction: X direction) of the “plastic deformation portion 2”. Say that you have. In the portions located on both sides of the “plastic deformation portion 2” in the deformation direction, hatched regions in FIG. 1- (a) correspond to a part of the “joining portions 31, 31”. “Junctions 31, 31” are located on both sides of the “plastic deformation part 2” in the axial direction (Y direction) as part of the “connection part 3”, while both sides of the “plastic deformation part 2” in the width direction (X direction) Therefore, if each of the “connection portions 3” is subdivided, the “connection portions 3” are two (two) “joint portions 31 and 31” located on both sides of the “plastic deformation portion 2” in the width direction. ].

  As shown in FIG. 1- (a), the two “joining portions 31, 31” constituting the “connecting portion 3” are dispersed on both sides of the deformation direction (width direction: X direction) of the “plastic deformation portion 2”. The two “joining portions 31, 31” and “plastic deformation portion 2” are arranged so as to be parallel to the shearing force acting direction (X direction). “The joint portions 31 and 31 are joined to the structural member 6 mainly by bolting or welding, but when bolted, the insertion hole 3a through which the bolt 15 is inserted into the joint 31 as shown in the figure. Is formed.

  “The two joints 31 and 31 are located closer to the center in the direction perpendicular to the shearing force acting direction of the plastic deformation portion 2 (the axial direction of the plastic deformation portion 2)” as shown in FIG. Unlike the joints of conventional dampers arranged in series with the plastic deformation part, the “joint parts 31, 31” are closer to the axial center side than both axial direction (Y direction) ends of the “plastic deformation part 2”. It means being in a position, and does not necessarily mean approaching the axial center. As described above, the “both joints 31, 31” are located on both sides of the shearing force acting direction (X direction) of the “plastic deformation part 2”, and the two “joints 31, 31” constituting the “connection part 3”. Point to.

  If at least a part of the hatched area in FIG. 1- (a) is located closer to the center than the axial direction (Y direction) end of the “plastic deformation part 2” indicated by the broken line in FIG. Since the bending moment of the part located closer to the center than the broken line is smaller than the maximum value Mb of the bending moment of the “plastic deformation part 2”, the bending moment generated in the entire (total length) of the “joint part 31” is shown in FIG. It becomes smaller than the bending moment which arises in the whole junction part of the conventional damper shown in FIG.

  That is, the central portion in the Y direction of the “joint portion 31”, which is a hatched region, passes through the end portion in the axial direction (Y direction) of the “plastic deformation portion 2” indicated by the broken line, and the bending moment parallel to the X direction is maximum. If it is located closer to the center in the axial direction (Y direction) of the “plastic deformation part 2” than the straight line having the value Mb, the bending moment generated at the center in the Y direction of the “joining part 31” becomes Mb or less. As a result, the damper 1 can be made smaller than the conventional damper as will be described later.

  Therefore, the “joining portion 31” only needs to be at a position where at least a part of the region is closer to the axial center side than both ends in the axial direction (Y direction) of the “plastic deformation portion 2”. As shown in FIG. 1- (a), FIG. 4- (b), etc., the “portion 31” sandwiches a line separating the “connecting portion 3” from the axial end portion of the “plastic deformation portion 2” indicated by a broken line. It also includes straddling the axial direction (Y direction) center side from the axial direction (Y direction) both ends of the plastic deformation portion 2 ”.

  “Junction 31” refers to at least a portion (region) joined to the structural member 6 in the damper 1, and refers to a portion (region) in which the insertion hole 3a is formed when bolted. In the case where joining to the region (range) indicated by hatching of the portion located on the center side from the end portion of the “plastic deformation portion 2” in FIG. 1- (a) is sufficient in FIG. Only becomes the “joint 31”. However, when the insertion hole 3a is formed up to the end in the axial direction (Y direction) of the “plastic deformation portion 2” as shown in FIG. The region that continues to the end in the axial direction (Y direction) of “2” also functions as the “joining portion 31”.

  “The joints 31 and 31 of each connection part 3 are positioned closer to the center of the plastic deformation part 2 in the axial direction (Y direction)”, so that “the joints 31 and 31” and “plastic deformation part 2” are sheared. In combination with the parallel arrangement in the force acting direction (X direction), the “plastic deformation part 2” is formed in two (two) “joints 31, 31” from both sides of the shearing force acting direction (X direction). It will be sandwiched.

  The “both joints 31, 31” are arranged in parallel with the “plastic deformation part 2” in the shearing force acting direction (X direction) and are located on both sides in the X direction of the “plastic deformation part 2”, so that “plastic deformation part 2” When viewed in the axial direction (Y direction), part of the “joining portions 31, 31” is located closer to the center than the end portion in the axial direction (Y direction) of the “plastic deformation portion 2”. As a result, the bending moment received by the “joining portions 31, 31” when the shearing force is applied between the “connecting portions 3, 3” on both sides in the axial direction (Y direction) of the “plastic deformation portion 2” as described above is conventional. When the Y-direction center portion of the “joint portions 31, 31” is located closer to the center than the end portion in the axial direction (Y direction) of the “plastic deformation portion 2”, the “plastic deformation” It becomes below the maximum value Mb of the bending moment generated at the axial direction (Y direction) end of the “part 2”.

  The bending moment generated in the “plastic deformation part 2” is 0 at the center in the axial direction (Y direction) of the “plastic deformation part 2”, and is maximum at the axial end of the “plastic deformation part 2” as indicated by the broken line. Therefore, when viewed in the axial direction of the “plastic deformation portion 2”, the bending moment of the portion located on the center side from the end portion of the “plastic deformation portion 2” is equal to or less than the maximum value Mb.

  As described above, in FIG. 1- (a), the regions located on both sides of the deformation direction (width direction: X direction) with respect to the “plastic deformation portion 2” are indicated by hatching as “joining portions 31”. Even if the region continuing to the end in the axial direction (Y direction) of the “plastic deformation portion 2” with the width of the “joint portion 31” shown in 1- (a) is regarded as the “joint portion 31”, FIG. -If at least a part of the hatched area in (a) is located closer to the center than the end in the axial direction (Y direction) of the "plastic deformation part 2", the entire "joint part 31" (full length) The bending moment generated in FIG. 2 is smaller than the bending moment generated in the entire joint portion of the conventional damper shown in FIG.

  The bending moment Ma generated in the “joint portion” located on both sides of the axial extension line in the plastic deformation portion of the conventional damper shown in FIG. 2A is the axial direction (Y direction) of the “plastic deformation portion”. ), The “joining part” is arranged in series with the “plastic deformation part”, so that the maximum value Mb of the bending moment generated in the axial direction (Y direction) in the “plastic deformation part” as shown in FIG. Greater than (Ma> Mb). As described above, Ma in FIG. 2B indicates the bending moment at the intermediate portion (center) position in the Y direction of the joint portion.

  In contrast, in the present invention, the “joining portions 31, 31” are parallel to the “plastic deformation portion” in the direction (X direction) orthogonal to the axial direction (Y direction). The bending moment generated in “31” is “plastic deformation portion 2” when the Y direction center portion of “joint portions 31, 31” is located closer to the center than the axial direction (Y direction) end portion of “plastic deformation portion 2”. "Below the maximum value Mb of the bending moment generated at the end portion in the axial direction (Y direction)", "joint portions 31, 31" are smaller than the bending moment borne by the axial end portion of "plastic deformation portion 2". It only has to bear the bending moment. Therefore, the area of the “joint portions 31, 31” can be made smaller than the joint portion of the conventional damper when the “joint portions 31, 31” have a strength capable of resisting a bending moment.

  As a result, the area S2 of the entire damper 1 (main body 1A) including the “plastic deformation portion 2” and the “connection portion 3” of the present invention is the same as that of the conventional damper (main body 1A) having the same “plastic deformation portion”. ) Can be made smaller than the area S1, and the necessary amount of steel used can be reduced accordingly, so that the manufacturing cost can be greatly reduced.

  For example, the area S1 of the steel plate (main body 1A) including the removed portion, which is necessary for manufacturing the conventional damper shown in FIG. If the area S2 of the steel plate (main body 1A) necessary for manufacturing the damper 1 of the present invention shown in a) is compared, S2 / S1 is approximately ½ as will be described later. FIG. 3 shows a state in which the damper 1 of the present invention shown in FIG. 1 is stacked on the conventional damper shown in FIG.

  The area S1 of the steel plate (main body 1A) including the removed portion of the conventional damper shown in FIG. 2- (a) is S1 = b1 × h1 as shown in FIG. 3, and the damper of the present invention shown in FIG. The area S2 of the steel plate (main body 1A) including the removed portion 1 is S2 = b2 × h2, and in the case of the ratio shown in FIG. 3, S2 / S1 = about 0.54. This means that the amount of steel used (material cost) for manufacturing the damper 1 is about half that of the conventional damper.

  The area S3 of the portion (region) corresponding to the “connection portion 3” excluding the “plastic deformation portion” of the conventional damper shown in FIG. 2A is S3 = b1 × h3 as shown in FIG. The area S4 of the “connection portion 3” excluding the “plastic deformation portion 2” of the damper 1 of the present invention shown in FIG. 4A is S4 = b2 × h4 + 2 × b3 × h5, and in the case of the ratio shown in FIG. = About 0.48. This maintains the fixed state in the “connection portion 3 (joint portion 31)” for joining (fixing) the damper 1 having the energy absorption capability (plastic deformation capability) equivalent to that of the conventional damper to the structural member 6. This means that the damper 1 can be made smaller in size (scale) than the conventional damper in order to bear a bending moment for plastically deforming the “plastic deformation portion 2”.

  As described above, the area S2 of the steel plate necessary for manufacturing the damper 1 of the present invention is about half of the area S1 of the steel plate required for manufacturing the conventional damper, and the joints 31, 31 are plastically deformed. Since it can be arranged on both sides in the width direction of the portion 2, the area to be removed in order to manufacture the damper 1 in one plate is reduced.

  In the case of a conventional damper, as shown in FIG. 2A, the pentagonal regions on both sides in the width direction of the plastic deformation portion 2 are useless regions that are not used for the joint portion 31. Is not considered to be used as the joint 31. On the other hand, taking in the regions on both sides in the width direction of the plastic deformation portion 2 into a part of the plastic deformation portion 2 increases the in-plane rigidity, and decreases the plastic deformation capability of the plastic deformation portion 2. Must be absent from the damper.

  On the other hand, in this invention, as shown to FIG. 1- (a), since the junction part 31 can be arrange | positioned at the width direction both sides of the plastic deformation part 2, as a region which should be removed, the plastic deformation part 2 and the junction parts 31 and 31 are shown. It is only necessary to form a slit (vertical slit 5) for separating the material, and material that is wasted is saved. Accordingly, the ratio of the removed portion to the area of one original steel material is small, and the ratio of the amount of steel material required for manufacturing one damper to the raw steel material is increased, so that the manufacturing efficiency is increased.

  Speaking extremely, as shown in FIG. 4A, for the damper 1 main body 1A, the horizontal slit 4 that bisects the main body 1A on both sides in the axial direction of the plastic deformation portion 2, and the plastic deformation of the horizontal slit 4 A longitudinal slit 5 that divides the plastic deformation portion 2 and the joint portions 31, 31 may be inserted in the axial direction of the plastic deformation portion 2 from the end on the portion 2 side. The transverse slit 4 may be inserted until it reaches the side surface in the width direction of the plastic deformation portion 2 from the periphery of the steel plate before processing. FIG. 4- (b) shows an example in which the damper 1 having the shape shown in FIG. 1 (a) and the damper 1 having the shape shown in FIG. 4- (a) are combined.

  In order to set the bending moment generated in the “joint portions 31, 31” to be equal to or less than the maximum value Mb of the bending moment generated in the axial direction (Y direction) of the “plastic deformation portion 2”, as shown by a broken line in FIG. Passes through the positions of both ends of the plastic deformation part 2 in the axial direction (Y direction) and is closer to the center side of the plastic deformation part 2 in the axial direction (Y direction) than the straight line parallel to the shearing force acting direction (X direction). ), The Y direction center part of the joint parts 31 and 31 may be disposed. However, since the plastic deformation portion 2 and the joint portions 31, 31 are part of the damper 1, the joint portions 31, 31 that are continuous to the plastic deformation portion 2 are positioned on both sides in the width direction of the plastic deformation portion 2. A connecting region is required for the plastic deformation portion 2 and the joint portions 31 and 31 to be continuous.

  Therefore, a connecting portion 32 that connects the plastic deforming portion 2 and the joint portions 31, 31 is connected to both ends of the plastic deforming portion 2 in a direction perpendicular to the shearing force acting direction (Y direction), and shearing of the connecting portion 32 is performed. By forming the joint portions 31 and 31 continuously on both sides in the force acting direction (Claim 2), the continuity between the plastic deformation portion 2 and the joint portions 31 and 31 is ensured.

  In the second aspect, the connecting portion 32 functions to make the plastic deformation portion 2 and the joint portions 31, 31 functionally continuous. However, when the joint portion 32 overlaps the structural member 6, the joint portion 31 is connected to the joint portion 32. It can also serve as a function. For this reason, when the connection part 32 functions as the junction part 31, in the joining state to the structural member 6 in the connection part 3, the shear force which tries to isolate | separate the structural member 6 and the elastic-plastic damper 1 to an in-plane direction. It is possible to increase the resistance force (shear resistance force) to the structural member 6 and improve the integrity effect of the structural member 6 and the elastic-plastic damper 1. 1A shows a state in which the insertion hole 3a through which the bolt 15 is inserted is also formed in the connecting portion 32. FIG.

  When the joint portion 31 or the joint portion 31 and the joint portion 32 are joined to the structural member 6 by the bolt 15, the joint portion 31 is acted upon when a shearing force is applied to separate the structural member 6 and the damper 1 in the in-plane direction. Since a shearing force in a direction perpendicular to the axis acts on the bolt 15 inserted through the insertion hole 3a, the bolt 15 resists an external force by a shearing resistance force or a frictional force with the structural member 6. .

  The damper 1 of the present invention shown in FIG. 1- (a) and FIG. 4 and subsequent figures is a plastic deformation portion with a joint portion 31 sandwiched in a shearing force acting direction (X direction) as shown in FIGS. 6 (a)-(d). A plurality of 2 may be formed in an arrayed shape (claim 4). In this case, since one damper 1 has a plurality of plastic deformation portions 2, it has an advantage of high energy absorption capability.

  “A plurality of plastic deformation portions 2 are arranged across the joint portion 31” means that the plurality of plastic deformation portions 2 are arranged in the shearing force acting direction (X direction) as shown in FIGS. 6 (a) and 6 (b). It means that the joint portions 31 are arranged alternately or as shown in FIGS. 6 (c) and 6 (d), and the joint portions 31 are gathered and arranged at both ends, and the entire direction of the shear force acting on the damper 1 (main body 1A). The joint portions 31 are located on both sides in the (X direction). By arranging “a plurality of plastically deforming portions 2”, the damper 1 according to claim 4 is, for example, as shown in FIGS. 6- (a) and (b), shown in FIGS. The deformed portion 2 "has a shape in which a single damper 1 is connected in a shearing force acting direction (X direction), and the damper 1 shown in FIG. The shape is folded back in the shearing force acting direction at the position.

  6A shows a configuration in which a plurality of the plastically deformed portions 2 of the damper 1 having the shape shown in FIG. 1A are arranged with the joint portions 31 sandwiched in the shearing force acting direction (X direction). In this case, (b) forms the damper 1 in a shape in which a plurality of the plastically deformed portions 2 of the damper 1 having the shape shown in FIG. 4- (a) are arranged with the joint portions 31 in the shearing force acting direction (X direction). Shows the case. 6 (c) and 6 (d) correspond to shapes in which the joint portions 31 between the plastic deformation portions 2 and 2 adjacent in the X direction are omitted in FIGS. 6 (a) and 6 (b). To do. In FIG. 6- (b), one plastic deformation part 2 is formed in the X direction intermediate part, but in FIG. 6D, two plastic deformation parts 2 are arranged in the intermediate part.

  The plastic deformation part is located near both sides in the direction perpendicular to the shearing force acting direction, and the connection part connected to the structural member has joints located on both sides of the plastic deformation part in the shearing force acting direction. Since the joining portion is located closer to the center in the direction perpendicular to the shearing force acting direction of the plastic deformation portion, the joining portion and the plastic deformation portion can be arranged in parallel in the shearing force acting direction.

  As a result, the bending moment that the joint receives when the shearing force is applied between the connecting portions on both sides in the axial direction of the plastic deformation portion can be suppressed to be equal to or less than the maximum value Mb of the bending moment generated in the axial direction in the plastic deformation portion. In addition, since it is only necessary for the joint portion to bear the bending moment borne by the axial end of the plastic deformation portion with a bending moment smaller than that of the conventional damper, the area of the joint portion can be made smaller than the joint portion of the conventional damper. . Therefore, the area of the entire damper including the plastic deformation portion and the connection portion can be made smaller than the area of the entire conventional damper having the plastic deformation portion of the same area, and accordingly, the necessary amount of steel material used is also reduced. Production costs can be significantly reduced.

  In addition, since the joints can be arranged on both sides in the width direction of the plastic deformation part, when the damper is manufactured from one steel material (steel plate), a slit for separating the plastic deformation part and the joint part is to be removed. It is only necessary to form it, and wasteful materials can be saved. Therefore, the ratio of the amount of steel material required to manufacture one damper to the raw steel material is small, because the area of the removed part occupies a small area in the original steel material. Increases the production efficiency.

(A) is an elevational view showing a basic manufacturing example of the elastic-plastic damper of the present invention, and (b) shows a distribution state of bending moment generated in the plastic deformation portion when the plastic deformation portion receives a shearing force. FIG. (A) is an elevation view showing a basic manufacturing example of a conventional elastic-plastic damper, and (b) shows a distribution state of bending moment generated in the plastic deformation portion when the plastic deformation portion receives a shearing force. It is a bending moment figure. It is the elevation which showed a mode that the elastic-plastic damper of this invention shown in FIG. 1- (a) which has a plastic deformation part of the same shape and the same area was piled up on the conventional elastic-plastic damper shown in FIG. (A) is an elevation view showing an example of production in which the waste of the steel material is reduced as much as possible in producing the elastic-plastic damper of the present invention, and (b) is a plastic deformation of the shape shown in FIG. FIG. 5 is an elevational view showing a production example in which waste of the steel material is reduced as much as possible in producing an elastoplastic damper having a portion. (A) is an elevation view showing an example in which the region (area) of the joint is enlarged as a modification of the elastic-plastic damper of the production example shown in FIG. It is the elevation which showed a mode when the elastic-plastic damper shown showed a deformation | transformation by receiving a shearing force. (A) is a case where an elastic-plastic damper is formed in a shape in which a plurality of plastic deformation portions of an elastic-plastic damper having the shape shown in FIG. Fig. 4B is an elevation view showing a manufacturing example. Fig. 4B shows a shape in which a plurality of plastic deformation portions of the elastic-plastic damper having the shape shown in Fig. 4A are arranged with a joint portion interposed in the shearing force acting direction (X direction). Fig. 8C is an elevation view showing an example of production when an elastic-plastic damper is formed in Fig. 8C. Fig. 8C is an elastic view of the elastic-plastic damper shown in Fig. 9A in which the joint between the plastic deformation portions adjacent in the X direction is omitted. The elevation which showed the example of manufacture at the time of forming a plastic damper, (d) omits the joined part between the plastic deformation parts adjacent to the X direction in the elastic-plastic damper shown in (b), and is the X direction middle part Example of production when an elasto-plastic damper is formed in a shape in which two plastic deformation parts are arranged Is an elevational view taken. It is the elevation which showed the example of installation (joining) to the structural member of the elastic-plastic damper shown in FIG. 1- (a), (a) is the beam member from which the structural member separated, (b) separated In the case of a stud, (c) is the case of a brace and a beam member. FIG. 4- (b) or FIG. 5 is an elevation view showing an example of installation (joining) to the other structural member of the elastic-plastic damper shown in FIG. 5, where (a) is a beam member in which the structural member is separated, (B) is the case of the separated stud, and (c) is the case of the separated beam member.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1- (a) shows a bending yield type elasto-plastic damper (hereinafter referred to as a damper) having a main body 1A which is installed between structural members 6 and 6 separated from each other and is deformed by receiving a shearing force in an in-plane direction. ) A production example 1 is shown. The structural members 6 and 6 need only be separated from each other in a state where force is not directly transmitted, and the position within the structure is not limited. Specifically, there are seismic walls and brace / column / beam frames in addition to the separated beam members, column members, and inter-columns, and the structural member 6 includes a foundation.

  FIG. 1- (a) and the like show the direction (Y direction) perpendicular to the acting direction (X direction) of the shearing force acting on the damper 1 in a state where the damper is applied to the structural members 6 and 6. The shearing force does not necessarily act in the horizontal direction in the installation state of 1, but the shearing force acts in the vertical direction in the installation state as shown in FIGS. 7- (a), 8- (a), and (c). Sometimes.

  For example, as shown in FIG. 7A, in the case where the structural members 6 and 6 are beams (beam members) 12 and 12 that are installed between the columns 11 and 11 adjacent in the horizontal direction and are separated from each other, the column 11 When the frame composed of the beam 12 and the beam 12 is deformed between layers, relative deformation occurs in the vertical direction between the structural members 6 and 6 (beams (beam members) 12 and 12), and the acting direction of the shear force becomes the vertical direction. 1 is installed between the structural members 6 and 6 while being rotated 90 degrees from the orientation shown in FIG.

  As shown in FIG. 7- (b), when the structural member 6 is spanned between the beams 12 and 12 adjacent in the vertical direction and is separated from each other by the pillars (or walls) 13 and 13, Since relative deformation occurs in the horizontal direction between the structural members 6 and 6 (intermediate columns 13 and 13) and the acting direction of the shearing force becomes the horizontal direction, the damper 1 remains in the structural member in the direction shown in FIG. It is installed between 6 and 6.

  FIG. 7- (c) shows the installation state of the damper 1 when one structural member 6 is a brace 14 and the other structural member 6 is a beam 12 constituting a frame. In this case, the structural member 6 , 6 is relatively deformed in the horizontal direction, so that the damper 1 is installed between the structural members 6, 6 in the state shown in FIG. 1- (a), as in the case of FIG. 7- (b). . When the brace 14 is joined to the column 11 via the damper 1, the relative deformation is in the vertical direction, so the damper 1 is used in the same direction as FIG. 7- (a).

  The main body 1A of the damper 1 is located at or near the center of the main body 1A as shown in FIG. 1- (a) and the like, and is a plastic deformation portion 2 that can bend and yield by bearing a shearing force in the X direction indicated by an arrow. And three portions of connecting portions 3 and 3 connected to the respective structural members 6 and located on both sides of the plastic deformation 2 portion in the direction (Y direction) perpendicular to the direction of the shearing force (X direction). In FIG. 1- (a), a region having a drum-like shape obtained by combining a substantially trapezoidal shape in a line-symmetric manner in the X direction at the center of the main body 1A indicates the plastic deformation portion 2. In the drawing, the outer shape of the main body 1A is formed in a rectangular shape from the viewpoint of ease of manufacture and ease of joining to the structural member 6, but the outer shape of the main body 1A is arbitrary, such as a polygonal shape, an elliptical shape, a circle shape. It is also formed in shape and the like.

  Each connecting portion 3 has joint portions 31, 31 that are dispersedly located on both sides of the shearing force acting direction (X direction) of the plastic deformation portion 2, and both joining portions 31, 31 are shearing force acting directions of the plastic deformation portion 2. It is located near the center in the direction (Y direction) perpendicular to the (X direction). In FIG. 1- (a), the hatched region indicates a part of the joint portion 31. However, in the drawing, the insertion hole 3a is also formed in a continuous region from the hatched region to the end in the Y direction. A region formed and hatched and a continuous region up to the end in the Y direction are used as the junction 31. The center of the direction (Y direction) perpendicular to the shearing force acting direction (X direction) of the plastic deformation part 2 is the most of the plastic deformation part 2 having a shape like a drum shape in which the approximate trapezoids shown in FIG. Refers to the narrow part. The direction (Y direction) perpendicular to the shearing force acting direction (X direction) is also the axial direction of the plastic deformation portion 2.

  The joints 31 and 31 are located on both sides in the X direction of the connection part 3 and attached to each side in the X direction, and are located closer to the center side in the axial direction (Y direction) of the plastic deformation part 2 in the Y direction. The joints 31 and 31 and the plastic deformation part 2 are arranged in parallel in the X direction. In order to continue the joint portions 31, 31 located on both sides in the X direction as a part of the connection portion 3, the connection portion 3 is configured at both ends in the axial direction (Y direction) of the plastic deformation portion 2 (connection portion). 3) is formed continuously. A part of the joint portions 31, 31 indicated by hatching from both side portions in the X direction of the connecting portion 32 to the center side in the Y direction is continuously formed.

  The connecting portion 3 is joined to the structural member 6 at least at the joining portion 31. However, since the connecting portion 32 is a part of the connecting portion 3, in the drawing, in addition to the joining portion 31, the connecting portion 32 is also connected to the structural member 6. An insertion hole 3 a for joining with the bolt 15 is formed, and the entire connection part 3 is used as the joining part 31.

  In the present invention, the entire connecting portion 3 performs the same function as the connecting portion in the conventional damper shown in FIG. 2A (exhibits energy absorption capability), but the connecting portion 31 is the axis of the plastic deformation portion 2. Since the bending moment which the whole connection part 3 bears by the shear force which acts between the connection parts 3 and 3 by being located near the direction (Y direction) center, the number of formation of the insertion holes 3a is as shown in FIG. In comparison with 2- (a), it is reduced. In the case of the damper 1 of FIG. 1- (a) having the plastic deformation part 2 of the same area as the plastic deformation part of FIG. 2- (a), the area of the connection part 3 is the same as that of the joint part of the damper of FIG. 2- (a). The size is about 50%, and accordingly, the number of insertion holes 3a is smaller than that of the conventional damper.

  4 (a) and 4 (b), when the steel material (steel plate), which is the original shape of the damper 1 main body 1A, is rectangular, there are few parts to be removed when the damper 1 is manufactured from one steel material. The example of manufacture when the damper 1 is manufactured in a shape with little waste is shown. 4- (a) and (b), the removed portion of the steel material (steel plate) is limited to the vertical and horizontal slits only.

  If the main body 1A of the damper 1 is roughly divided, the three portions of the plastic deformation portion 2 occupying the central portion of the main body 1A or a region in the vicinity thereof and the connection portions 3 and 3 positioned on both sides in the axial direction (Y direction) ( Area). Therefore, in dividing the main body 1A into these three parts, as shown in FIG. 4- (a), the shearing force acting direction (X direction) is directed sideways and the vertical direction (Y direction) is oriented vertically. The horizontal slit 4 is inserted from the Y-direction intermediate portion (center portion) of the longitudinal outer periphery of the main body 1A to the middle of the main body 1A in parallel with the X direction, The main body 1A is divided into three parts by inserting the vertical slit 5 in the middle of the main body 1A in parallel with the direction.

  The direction of the horizontal slit 4 is not necessarily parallel to the X direction, and may be inclined with respect to the X direction. Moreover, the horizontal slit 4 is not necessarily inserted from the Y-direction central portion of the longitudinal outer periphery of the main body 1A. Similarly, as shown in FIG. 4B, the direction of the longitudinal slit 5 is not necessarily parallel to the Y direction and may be inclined with respect to the Y direction.

  The horizontal slit 4 is basically inserted in the X direction from the middle position, particularly the central position, of the entire length of the longitudinal outer peripheral edge of the main body 1 </ b> A to the position defining the outer shape of the plastic deformation portion 2. The vertical slit 5 is inserted in the Y direction from the position that defines the plastic deformation portion 2, which is the end of the horizontal slit 4, to the position that defines the end in the axial direction (Y direction) of the plastic deformation portion 2. The position that divides the end portion in the axial direction (Y direction) of the plastic deformation portion 2 that is the end portion of the vertical slit 5 is also a boundary with the connection portion 3. The main body 1 </ b> A is partitioned into the plastic deformation portion 2 and a part of the joint portion 31 in the X direction by forming the vertical slit 5. The main body 1 </ b> A is divided into joint portions 31, 31 of connection portions 3, 3 located on both sides in the axial direction of the plastic deformation portion 2 in the Y direction by the formation of the lateral slits 4.

  FIG. 4- (b) shows the elevational shape of the plastic deformation portion 2 defined by the vertical slit 5 when the horizontal slit 4 and the vertical slit 5 are inserted in the manner shown in FIG. 4- (a). An example in which the direction of the longitudinal slit 5 is angled with respect to the Y direction so as to have a shape close to the plastic deformation portion 2 of the damper 1 shown in FIG. In this case, the vertical slit 5 is inclined from the end of the horizontal slit 4 to the connecting portions 3 and 3 so as to increase the distance from the center line facing the axial direction (Y direction) of the plastic deformation portion 2. Forming.

  In FIG. 4- (b), the inclination angle of the vertical slit 5 from the direction close to the axial direction (Y direction) of the plastic deformation portion 2 toward the direction parallel to the X direction is changed from the direction close to the connecting portion 3 of the vertical slit 5 to the direction close to parallel to the X direction. However, by doing so, the width of the end portion in the axial direction of the plastic deformation portion 2 can be gradually increased toward the connection portion 3. As a result, since the formation of the portion where the width of the axial end portion of the plastic deformation portion 2 changes rapidly is eliminated, it is possible to avoid stress concentration near the axial end portion of the plastic deformation portion 2 during plastic deformation. There is.

  FIG. 5B shows a state in which the connecting portions 3 and 3 of the damper 1 shown in FIG. 5A are joined to the structural members 6 and 6, and relative deformation occurs between the structural members 6 and 6 while being parallel to each other. The state when a shearing force acts on the damper 1 and a bending moment acts on the plastic deformation portion 2 is shown. As shown here, the damper 1 follows the relative deformation between the structural members 6 and 6 by causing the plastic deformation portion 2 to undergo shear deformation accompanied by bending deformation.

  FIG. 5- (a) is an example of a modification of the damper 1 of the manufacturing example shown in FIG. 4- (b), and enlarges the region (area) of the joint portions 31, 31 on both sides of the plastic deformation portion 2 to the structural member 6. The example of manufacture at the time of increasing resistance with respect to the shearing force which acts between the structural members 6 and 6 in the joining state of is shown. (B) has shown the mode when the damper 1 shown to (a) receives a shear force to a X direction, and produced a deformation | transformation.

  In FIG. 5B, as the behavior of the plastic deformation portion 2 at the time of shear deformation, the connection portion 3 located above the plastic deformation portion 2 moves relative to the lower connection portion 3 to the left in the drawing (relative deformation). ) Is shown. If attention is paid to the upper connecting portion 3, among the connecting portions 3, the joint portion 31 located on the right side with respect to the plastic deformation portion 2 tends to approach the plastic deformation portion 2, and the joint portion 31 located on the left side is plastically deformed. Trying to move away from part 2.

  In FIG. 5B, the connecting portion 3 positioned on the upper side (lower side) with the plastic deformation portion 2 interposed therebetween is deformed relative to the left side (right side) with respect to the connecting portion 3 positioned on the lower side (upper side). However, since the relative deformation occurs alternately in the positive and negative directions of the shearing force acting direction (X direction), the joint located on the upper side (lower side) in the next scene in FIG. The portion 31 is deformed relative to the right side (left side) with respect to the connection portion 3 located on the lower side (upper side).

  Thus, at the time of relative deformation between both the connection parts 3 and 3, between the joint part 31 and the plastic deformation part 2 of the side (upper right side and lower left side of FIG.5- (b)) which is going to approach the plastic deformation part 2 The opposing inner peripheral surfaces, which are the width of the longitudinal slit 5 in between, approach each other, and until the opposing inner peripheral surfaces of the vertical slits 5 are in contact with each other, a shearing force acting direction (X direction) is established between the connecting portions 3 and 3. Relative deformation may occur. Specifically, at the time of relative deformation between the connecting portions 3 and 3, the upper right joint portion 31 and the lower left joint portion 31 that are point-symmetric with respect to the center of the plastic deformation portion 2 in the axial direction (Y direction). Side surfaces (inner peripheral surfaces of the vertical slits 5) on the respective plastic deformation portions 2 approach the side surfaces (inner peripheral surfaces of the vertical slits 5) of the plastic deformation portions 2 facing each other.

  As a result, when the relative deformation between the connecting portions 3 and 3 progresses, the opposing side surfaces (the opposing inner peripheral surfaces of the vertical slits 5) come into contact with each other. Since deformation is limited, both opposing side surfaces function as a stopper that limits the relative deformation amount of the joint portion 31 (connection portion 3) with respect to the plastic deformation portion 2 or the relative deformation amount between the connection portions 3 and 3. Will be fulfilled. The “inner peripheral surface facing the vertical slit 5” refers to the inner peripheral surface of the entire circumference of the vertical slit 5 that opposes the shearing force acting direction (X direction). It is the width and refers to the distance between the inner peripheral surfaces facing the shearing force acting direction (X direction).

  At the next moment of FIG. 5B, both connecting portions 3 and 3 behave line-symmetrically with respect to the axial direction (Y direction) of the plastic deformation portion 2, so that they are point-symmetric with respect to the axial center of the plastic deformation portion 2. The side surface (the inner peripheral surface of the vertical slit 5) of the left upper joint portion 31 at the position (the inner peripheral surface of the vertical slit 5) and the side surface of the lower right joint portion 31 on the plastic deformable portion 2 (the inner peripheral surface of the vertical slit 5) ) Approach the side surface of the plastic deformation portion 2 and can function as a stopper. When the inner peripheral surfaces of the vertical slits 5 are parallel to each other and follow the deformation of the plastic deformation portion 2, the opposing inner peripheral surfaces of the vertical slits 5 are in uniform contact over the entire length. However, if the inner peripheral surfaces do not maintain a parallel state, the inner peripheral surfaces that contact first become stoppers.

  Thus, the side surface (inner peripheral surface of the longitudinal slit 5) of the joint portion 31 and the side surface of the plastic deformation portion 2 on the side (upper right side and lower left side in FIG. It is possible to obtain a state in which the inner peripheral surfaces facing each other of the vertical slits 5 are in uniform contact with each other over the entire length or at least a certain interval. Since the inner peripheral surfaces facing each other of the vertical slits 5 are uniformly in contact with each other over at least a certain interval, the distance between the inner peripheral surfaces of the vertical slits 5 is not further reduced from that state. The deformation of the plastic deformation portion 2 after the contact state is prevented, and the relative deformation amount between the connection portions 3 and 3 (the deformation amount of the plastic deformation portion 2) is limited.

  Bending of the plastic deformation portion 2 within a certain construction surface, for example, within the frame of a column / beam, is limited by the amount of relative deformation between the connection portions 3 and 3 being limited by contact between the inner peripheral surfaces facing each other of the vertical slit 5. When a plurality of dampers 1 having different rigidity or shear rigidity are arranged, the plurality of dampers 1 can be made to function stepwise in order of increasing yield strength.

  For example, even if multiple bending deformation type dampers with different bending rigidity are arranged in the frame of columns and beams, if the amount of deformation of each damper is not limited as in the conventional case, the yielding yielded first. Since the shear force is borne while the damper having the lowest strength is deformed, the damper having higher yield strength than the damper is not yielded. After all, even if a plurality of dampers are arranged in one frame, they cannot be yielded in stages.

  In other words, even if a plurality of conventional dampers are arranged in one frame, not all the dampers function in stages, so it is not possible to expect an energy absorption effect for a plurality of dampers. There is no difference from the arrangement of one damper. Therefore, for example, if a damper is installed on the beam (beam member) of the frame, one damper is installed at the center of the beam.

  On the other hand, in the example of FIG. 5B, the shear deformation amount (bending deformation amount) of the plastic deformation portion 2 is limited, so that the yield strength differs (the relative deformation amount is limited). When the damper 1 is arranged in one frame, when the amount of deformation of the damper 1 with the lowest yield strength is limited, the damper 1 will not progress further, so the damper with the next lowest yield strength 1 starts yielding and undergoes plastic deformation. By installing a plurality of dampers 1 having different yield strengths in one frame in this way, it becomes possible to function stepwise in order of increasing yield strength.

  From this, in the example of FIG. 5- (b), the arrangement of a plurality of dampers 1 in one frame, which has no meaning in the prior art, has a meaning in expecting an energy absorption effect. The plurality of arrangements allow all the dampers 1 to function effectively and exhibit energy effects.

  6A and 6B show a manufacturing example in the case where the damper 1 is formed in a shape in which a plurality of plastic deformation portions 2 are arranged with the joint portion 31 in the shearing force acting direction (X direction). 6A shows a configuration in which two plastic deformation portions 2 of the damper 1 having the shape shown in FIG. 1A are arranged with the joint portion 31 sandwiched in the shearing force acting direction (X direction). When formed, (b) shows a configuration in which three plastic deformation portions 2 of the damper 1 having the shape shown in FIG. 4- (a) are arranged with the joint portion 31 sandwiched in the shearing force acting direction (X direction). Is formed. In these cases, the damper 1 has a plurality of the plastic deformation portions 2, so that the plurality of dampers 1 have the energy absorbing ability.

  6 (c) and 6 (d) are modified examples of FIGS. 6 (a) and 6 (b), respectively, and the joining between the plastic deformation portions 2 and 2 adjacent to each other in the X direction in FIGS. 6 (a) and 6 (b). An example of manufacturing when the damper 1 is formed in a shape in which the portion 31 is omitted is shown. In the case of the manufacturing example shown in FIGS. 6C and 6D, the joint portion 31 is present in the X-direction intermediate portion due to the absence of the joint portion 31 in the X-direction intermediate portion in (a) and (b). In comparison with the production example shown, the X-direction length of the damper 1 can be shortened and the entire area of the damper 1 can be reduced while having the same energy absorption capability, and the damper 1 can be reduced in size. There is. In the example shown in FIGS. 6C and 6D, the joint portions 31 are arranged only on both sides in the X direction by omitting the joint portions 31 between the adjacent plastic deformation portions 2 and 2. In (d), the insertion holes 3a for the bolts 15 are arranged in two rows in order to improve stability against separation from the structural member 10 when the joint portions 31 on both sides in the X direction are joined to the structural member 10. .

  7- (a), as described above, beams (beam members) 12, 12 as structural members 10 separated from each other in a state in which the damper 1 shown in FIG. 1- (a) is rotated 90 degrees from the direction. An example in the case of straddling between is shown. At the time of interlayer deformation of the frame composed of the pillar 11 and the beam 12, shear deformation is likely to occur between the webs of the beams (beam members) 12 and 12 (within the frame surface), so that the damper 1 is within the frame surface. In a state where the in-plane direction is directed to the direction, for example, the webs of both beams (beam members) 12 and 12 are overlapped and joined by bolts 15 or the like. The drawing shows a state in which the damper 1 is overlapped and joined to one side of the structural member 10 (web of the beam 12, etc.), but the damper 1 is overlapped and joined to both surfaces of the structural member 10 (web of the beam 12, etc.). Sometimes.

  FIG. 7- (b) shows an example in which the damper 1 shown in FIG. 1- (a) is separated from each other in the orientation and is straddled between the studs (walls) 13, 13 as the structural member 10. Yes. In this case, when the frame is deformed between layers, shear deformation tends to occur between the webs of the intermediate pillars 13 and 13 (within the frame structure), so that the damper 1 has the frame surface as in FIG. In a state where the in-plane direction is directed inward, for example, the webs of both the pillars 13 and 13 are overlapped and joined by bolts 15 or the like.

  FIG. 7- (c) shows the gap between the brace 14 as the structural member 10 and the beam 12 constituting the frame as the structural member 10 in which the dampers 1 shown in FIG. An example in the case of straddling is shown. In this case, during the interlayer deformation of the frame, as in FIG. 7- (b), since the shear deformation tends to occur between the brace 14 and the beam 12 in the frame surface, the damper 1 is in the frame surface. In the state where the in-plane direction is directed to the direction, the brace 14 and the beam 12 are joined directly or indirectly to each other. In the drawing, gusset plates 18 and 18 project from the brace 14 and the beam 12, respectively, and the damper 1 is joined to both gusset plates 18 and 18 by bolts 15.

  8 (a) to 8 (c), as shown in FIG. 5 (b), the damper 1 is installed in the frame of the pillar / beam so that the inner peripheral surface of the vertical slit 5 can exert the deformation limiting function. An example is shown. When a plurality of dampers 1 with a deformation limiting function are installed in one frame (one frame), it is possible to bend and yield in a stepwise manner in order of increasing yield strength. A plurality of dampers 1 having different yield strengths are installed in the construction surface (one frame).

  FIG. 8A shows a bracket 16, 16 as a structural member 10, which constitutes a beam 12 from pillars (column members) 11, 11 constituting the frame, and the structural member 10 between the brackets 16, 16. As an example, a beam member 12 is erected and a damper 1 is straddled between the bracket 16 and the web of the beam member 12. A joint member 17 is provided between the bracket 16 and the flange of the beam member 12.

  The beam (beam member) 12 is a column that is integrated with the column (column member) 11 in advance, out of the total length between the columns 11 and 11, as shown in FIG. It is often divided into a bracket 16 that is a partial section on the side and a beam member 12 that is an intermediate section disposed between the brackets 16 and 16, and the beam member 12 is joined to the brackets 16 and 16 in the field. The The beam member 12 and the brackets 16 on both sides are joined by a joint member 17 straddling between both webs and between the flanges.

  In FIG. 8B, brackets 16, 16 as structural members 10, which form a stud (wall) 13, project from beams (beam members) 12, 12 constituting the frame, and between the brackets 16, 16. The example of the case where the member of the intermediate pillar 13 as a structural member 10 is constructed and the damper 1 is straddled between the web of the member of the bracket 16 and the intermediate pillar 13 is shown. A joint member 17 is straddled between the flanges of the members of the bracket 16 and the intermediate post 13. Like the brace 14 shown in FIG. 7- (c), the stud (wall) 13 shown in FIG. 7- (b) and FIG. 8- (b) functions as an earthquake-resistant element in the frame. ) Expands, the stud 13 corresponds to a seismic wall.

  FIG. 8C is a cantilever beam member 12 or 12 as a structural member 10 that forms the beam 12 from the column (column member) 11 or 11 constituting the frame, as in FIG. In this state, an example is shown in which the damper 1 is protruded in a state of being separated from each other, and the damper 1 is straddled between the webs of the separated beam members 12 and 12. Although the joint member 17 is straddled between the flanges of the beam members 12 and 12 in FIG. 8- (c), the joint member 17 may not be straddled similarly to FIG. 7- (a).

1 ... Elastic-plastic damper, 1A ... Main unit,
2 ... Plastic deformation part,
3 .. connection part, 31 .. joint part, 32 .. joint part, 3a .. insertion hole,
4 ... Horizontal slit, 5 ... Vertical slit,
6 …… Structural members
11 …… Column (column member), 12 …… Beam (beam member),
13 ... studs (walls), 14 ... braces,
15 ... bolts, 16 ... brackets,
17 ... Fitting member, 18 ... Guset plate.

Claims (4)

It is a plate-like elastoplastic damper that is installed across structural members separated from each other, deforms by receiving a shearing force in the in-plane direction, and bends and yields.
A plastic deformation part that is located at or near the center of the plate-like main body and can be bent and yielded by bearing the shearing force, and located on both sides of the plastic deformation part in a direction perpendicular to the shearing force acting direction. And three portions of a connecting portion connected to each structural member,
Each of the connecting portions has joints that are distributed and located on both sides of the shearing force acting direction of the plastic deformation part. Bending-yield elasto-plastic damper, characterized in that   The joint portion is continuous at both ends of the plastic deformation portion in a direction perpendicular to the shearing force acting direction, and the joint portion is continuous on both sides of the joining force in the shearing force acting direction. The bending yield type elastoplastic damper according to 1.   The plastic deformation portion has an elevational shape corresponding to a bending moment distribution alternately generated in the shearing force acting direction with respect to an axis oriented in a direction perpendicular to the shearing force acting direction when the shearing force is applied. The bending yield type elastic-plastic damper according to claim 1 or 2. The bending yield type elastoplastic damper according to any one of claims 1 to 3, wherein a plurality of the plastic deformation portions are arranged in the direction in which the shearing force is applied with the joint portion interposed therebetween.

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