JP5314203B1 - Structure connection structure - Google Patents

Abstract

An object of the present invention is to construct an axial force member with a damper for reducing vibration when a relative displacement in a direction opposite to each other occurs between, for example, existing structures facing each other at a distance. The load of the plurality of anchors that fix the base plate that joins the end portion of the axial force member to the structure is equalized, and the size to be given to the anchor is minimized.
SOLUTION: When both structures 1 and 2 are displaced relative to each other in a direction opposite to each other, an axial force is applied while the structures 1 and 2 are displaced relative to each other, and a damping force is applied during the expansion and contraction. The generated axial force member 3 is erected in the direction in which the structures 1 and 2 face each other in the axial direction, and at least both ends of the axial force member 3 are fixed to the base plate 4 fixed to the surface of each structure 1 and 2. A structure in which a plurality of anchors 5 that are rotatably joined around a horizontal axis in a plane orthogonal to the axial direction of the axial force member 3 and that are parallel to the axial direction of the axial force member 3 are passed through the base plate 4. Fix to 1 and 2 and join to the base plate 4.
[Selection] Figure 1

Description

  In the present invention, an axial force member that reduces vibrations of a structure when a relative displacement in the opposite direction between the two structures is generated, for example, between the structures facing each other at a distance is provided. It is related with the connection structure of the structure which connected the body.

  For example, when existing structures are facing each other (adjacent), such as apartment buildings or other buildings, or when two new structures are built at a distance from each other If there is a possibility that both structures vibrate at different frequencies due to earthquakes, winds, etc., use a difference in the frequency of both structures by installing a damper between the two structures. Can be reduced (see Patent Documents 1 to 5). For the damper laid between the structures at a distance, it is suitable to use an oil damper or the like of the type that mainly uses the relative movement in the axial direction of the components constituting the damper or the relative speed.

  When installing a damper between opposing structures, it is effective to install a damper in a section where the relative displacement generated between the opposing structures during deformation of the structure, for example, during bending deformation, is large. In many cases, the axial direction is set in the vertical direction or in a direction inclined with respect to the horizontal direction (Patent Documents 1 and 3).

  When installing dampers between structures that are spaced apart from each other, both ends of the damper will rotate at least around the horizontal axis relative to each structure when the structures are deformed. In order to prevent a bending moment from acting on the portion, both end portions of the damper need to be pin-coupled to each structure so as to be rotatable. Specifically, the end of the damper is pin-bonded to a gusset plate protruding on the surface side of the base plate that is in close contact with the surface of the structure, but when the anchor is used to fix the base plate to the structure, the anchor Is inserted and fixed in the structure with the axial direction facing the direction perpendicular to the surface of the structure (see Patent Document 6).

JP-A-2-232478 (the second page, upper right column, line 20 to lower left column, line 5, FIG. 1) JP-A-9-235890 (Claim 2, paragraph 0015, FIGS. 1- (b), (c)) Japanese Patent Laid-Open No. 10-18636 (Claim 1, paragraphs 0008 to 0014, FIGS. 1 to 4) JP 2001-3982 (paragraph 0032, FIG. 2) JP 2001-123696 A (paragraph 0034, FIG. 1) Japanese Patent Laying-Open No. 2005-126894 (paragraphs 0056 to 0064, FIGS. 3 to 6)

  When the brace is a damper built-in type as in Patent Document 6, or when the damper also serves as the brace, an angle is formed between the axial direction of the damper and the axial direction of the anchor. When a tensile force is applied, a bending moment is applied to the shaft portion of the anchor.

  In addition, when a plurality of anchors are used for fixing one base plate as in Patent Document 6, when the brace bears a tensile force, the tensile force borne by the plurality of anchors is not uniform. It is assumed that a specific anchor can easily escape from the structure. The situation where the load of the plurality of anchors is not uniform can also be said when a shear force in a direction perpendicular to the axial direction of the anchor is transmitted from the brace to the base plate. The shear force acts on the anchor when a vertical load from the brace acts on the base plate. In addition, a component force parallel to the surface of the base plate when the brace bears a tensile force acts on the anchor as a shearing force.

  For example, when retrofitting a base plate to an existing structure, the number of anchors that can be inserted into the housing, and the length and diameter (thickness) of the shaft portion are determined in order to minimize damage to the housing due to anchor anchoring. Due to restrictions, it is better to use fewer anchors. However, if the tensile force (pull-out force) and the shearing force borne by multiple anchors fixing the base plate to the structure are different for each anchor, not all anchors will exhibit the same resistance. The number of anchors required is increased. Also, from the viewpoint of safety, the dimensions of the other anchors must be aligned with the dimensions of the anchor that receives the largest pulling force, so that the dimensions of all the anchors become larger than necessary, and the damage to the housing increases accordingly.

  In the present invention, even when an axial force member with a damper is installed between opposing (adjacent) structures and both ends are joined to each structure, the present invention provides a plurality of anchors for fixing the base plate to the structure. The present invention proposes a connection structure for a structure that makes it possible to equalize the burden and to minimize the dimensions to be given to the anchor.

The structure connecting structure according to the first aspect of the present invention bears an axial force when the two structures are relatively displaced in a direction facing each other between the concrete structures facing each other at a distance. However, a damper built-in type axial force member that expands and contracts in the axial direction and generates a damping force at the time of expansion and contraction is installed with the axial direction facing the structure, and both ends of the axial force member are connected to the respective structures. A base plate fixed to the surface of the body is joined to at least a horizontal axis in a plane perpendicular to the axial direction of the axial force member,
A plurality of anchors facing in a direction parallel to the axial direction of the axial force member are fixed to the structure through the base plate, and are joined to the base plate,
A shaft portion embedded in the structure of the anchor includes a fixing portion on a distal end portion side having a cross-sectional area larger than a cross-sectional area perpendicular to the shaft portion,
The head portion separated from the shaft portion is screwed into the shaft portion on the shaft force member side of the shaft portion, and is in a state of being in close contact with the surface of the structure.
The head part and the fixing part are paired with a hardened body made of a filler or concrete sandwiched between the structure in which the shaft part is embedded, and with the screwing of the head part into the shaft part, The hardened body or concrete is in a state where an axial compressive force is applied thereto.

The “direction in which the structures oppose” refers to the horizontal direction in which the adjacent structures oppose each other. The opposing structures may be existing or newly established, and one structure may be existing and the other structure may be newly provided. Regardless of the structural type of the structure , there are reinforced concrete structures , steel reinforced concrete structures, and the like. The structure may be a pier. When both opposing structures are bent or sheared independently in the opposing direction when a horizontal force such as an earthquake or wind load is applied, the distance between the opposing surfaces (wall surfaces) changes. Since the distance between both ends of the axial force member installed on the shaft changes, the axial force member expands and contracts in the axial direction, and a damping force is generated along with the expansion and contraction, whether or not the natural frequency of each structure differs I will not.

  When each structure deforms independently of each other when a horizontal force is applied, for example, there is a difference in the bending stiffness between the two structures, and due to the difference in natural frequency due to the difference in bending stiffness, There is no difference in bending rigidity from the case of bending deformation due to vibration), and even though the bending deformation is uniform, relative rotational deformation occurs at the joint between each structural body and the axial force member. The distance between both ends of the member may change. In either case, the relative rotational deformation between each structure and the axial force member occurs when at least one of the structures undergoes bending deformation or shear deformation.

  The built-in damper type axial force member bears axial force and consists of a separate main body part and a damper part, for example, built in one main body part and the other main body part being connected to be relatively movable in the axial direction. Attenuation according to the amount of relative movement or relative speed when both body parts expand and contract in the axial direction when both body parts bear tensile and compressive forces as axial forces and both body parts expand and contract The damper part generates force.

  In addition to viscous dampers, viscoelastic dampers, friction dampers, elasto-plastic dampers, and the like can be used as dampers that constitute the damper portion and utilize the relative movement in the axial direction. In the case of an oil damper, the damper part is integrated with, for example, one main body part, and is disposed so as to be relatively movable in the axial direction in a cylinder filled with hydraulic oil, and integrated with the other main body part. As the piston moves in the cylinder, the hydraulic oil passes through an orifice formed in the piston or a flow path parallel to the cylinder to generate a damping force.

  Since the axial force member generates a damping force according to a change in the distance between both ends when the opposing structural body is deformed in the opposing direction, a surface orthogonal to the axial direction of the axial force member is mainly formed on each structural body. It is joined so as to be rotatable around the horizontal axis. However, since the deformation in the opposing direction of both structures may involve relative displacement in the direction orthogonal to the opposing direction, the structure can rotate around any axis in the plane orthogonal to the axial direction of the axial force member. It is appropriate to be joined to For example, as shown in FIG. 6, the state of being rotatably joined around an arbitrary axis in a plane orthogonal to the axial direction of the axial force member is perpendicular to the horizontal axis in the plane orthogonal to the axial direction of the axial force member. It can be obtained by joining (connecting) the axial force member to the structure (base plate) so as to be rotatable around the axis.

  The end of the axial force member is joined (coupled) to a base plate fixed to the surface of the structure so as to be rotatable about a horizontal axis or about an arbitrary axis, and the base plate has a structure in which a plurality of anchors penetrate the base plate. It is fixed to the structure by being fixed to the body and bonded to the base plate by being bonded to the base plate. The axial direction of the plurality of all anchors is directed to the axial direction of the axial force member, so that a bending moment acts on the anchor when compressive force and tensile force as axial direction force are applied from the axial force member to the base plate. The tensile force acts when the axial force member bears the tensile force.

  Since the compressive force when the axial force member bears the compressive force is transmitted to the structure as a support pressure from the back surface (surface on the structure side) of the base plate, in principle, the compressive force from the axial force member does not act on the anchor. . The tensile force from the axial force member acts as a pulling force from the base plate to all anchors. However, unless the base plate is deformed (bending deformation), especially unless it is plastically deformed, the tensile force is distributed over the entire surface of the base plate and transmitted to all anchors. Therefore, it acts equally on all anchors.

  In order to evenly transmit the axial force from the axial force member to all the anchors, the axial force of the axial force member acts on the center of the base plate in the vertical and horizontal cross sections, and all the anchors are in relation to the center of the base plate. Since it is appropriate that they are equally arranged in the vertical direction and the horizontal direction, the axial force member is joined to the base plate so that the center of the axial force member in the cross section is positioned on a horizontal line passing through the center of the base plate. The center of the base plate refers to the center (planar shape) when the base plate is viewed from the front (in the thickness direction), that is, in the xx line direction of FIG.

  When a plurality of anchors 5 are arranged in a plurality of stages in the vertical direction as shown in FIG. 1- (a), the vertical center of the plurality of anchors 5 arranged in the vertical direction when viewed in a vertical section. The axial force member 3 is connected to the base plate 4 so that the center line of the axial force member 3 coincides with a horizontal line passing through the base plate 4. Similarly, as shown in FIG. 1- (b), when a plurality of anchors 5 are arranged in a plurality of rows in the horizontal direction (width direction of the base plate 4), a plurality of anchors arranged in the horizontal direction when viewed in a horizontal section. The axial force member 3 is connected to the base plate 4 such that the center line of the axial force member 3 coincides with a horizontal line passing through the horizontal center of the entire anchor 5. For example, when a plurality of anchors 5 are arranged in an odd number of steps in the vertical direction, the center line of the axial force member 3 is aligned with the center line of the anchor 5 located in the center in the vertical direction, The center line of the axial force member 3 coincides with a line passing through the centers of the two anchors 5 and 5 positioned closer to the center in the vertical direction.

  Applying the tensile force from the axial force member 3 equally to all the anchors 5 is based on the premise that the base plate 4 is not deformed in the out-of-plane direction (plate thickness direction). When the base plate 4 is assumed to be bent and deformed, the rib plate 43 for imparting bending rigidity to the base plate 4 is joined to the surface of the base plate 4 as shown in FIG. Alternatively, the base plate 4 itself is given a thickness that does not cause bending deformation. However, as will be described later, when all the anchors 5 uniformly bear the tensile force from the axial force member 3, the thickness (diameter) of the anchors 5 can be suppressed, and as a result, a plurality of anchors 5 are inserted. Since the area of the base plate 4 can be suppressed, the base plate 4 itself can be set to a dimension that is difficult to bend and deform.

  Since the tensile force from the axial force member 3 acts evenly on all the anchors 5, the tensile force to be borne by all the anchors 5 becomes equal, and the burden on the specific anchor 5 does not increase. The dimensions can be unified. In addition, since the burden on the specific anchor 5 does not increase, the length (fixing length) of the shaft portion 5b and the thickness (diameter) of the shaft portion 5b of each anchor 5 can be reduced as compared with the case where the load on any anchor 5 is large. It becomes possible to suppress.

  When the structure 1 (2) is an existing concrete structure, the structure 1 (2) is formed with a drilling hole 1a for anchoring the anchor 5, but the distance between the adjacent drilling holes 1a and 1a is If approached, the remaining concrete may become brittle, and therefore, the plurality of anchors 5 may not be concentrated in a narrow area. From this viewpoint, it can be said that it is reasonable to reduce the thickness of the shaft portion 5b of the anchor 5. By suppressing the thickness of the shaft portion 5b, the diameter of the hole 1a can be reduced, and a certain distance can be secured between the adjacent holes 1a and 1a.

  According to the first aspect, the length and thickness of the shaft portion 5b of the anchor 5 can be reduced. As a result, the area occupied by all the anchors 5 in the structure 1 (2) can be minimized, and the structure 1 (2). It is possible to minimize the damage to the enclosure when existing. Specifically, since the depth and diameter of the hole 1a for embedding the anchor 5 (shaft portion 5b) can be suppressed with respect to the existing concrete structure 1 (2), a plurality of anchors 5 are provided. It becomes possible to minimize the scale of the fixing member composed of a group.

  As shown in FIGS. 1 and 2, the tensile force transmitted from the axial force member 3 to the base plate 4 is applied to the base plate 4 by the head 5 a of the anchor 5, the shaft 5 b, or the nut 6 screwed into the head 5 a. The structure is transmitted to the anchor 5 by being connected in a state in which a force directed to the structure 1 (2) side in the out-of-plane direction can be transmitted, and from the shaft portion 5b of the anchor 5 through the adhesion force or the supporting pressure. 1 (2). The state in which the head 5a, the shaft 5b, etc. of the anchor 5 can transmit a force to the base plate 4 to the structure 1 (2) side is directly or indirectly the base plate 4 to the head 5a, the shaft 5b, etc. of the anchor 5. In other words, it is the same as being in a state in which a force directed toward the axial force member 3 can be transmitted.

  Specifically, the end surface on the base plate 4 side of the head portion 5a or the shaft portion 5b of the anchor 5 is directly or indirectly engaged (locked) with the base plate 4 on the distal end side (structure 1 side) of the anchor 5. The nut 6 that is screwed into the head portion 5a or the shaft portion 5b is engaged (locked) with the base plate 4 toward the structure 1 or the head portion 5a or the shaft portion 5b is welded or the like. The anchor 5 is connected to the base plate 4 so that the tensile force of the axial force member 3 can be transmitted to the anchor 5 by being directly joined to the base plate 4.

  When the nut 6 is screwed into the anchor 5, the nut 6 may also serve as the head 5a. When the head portion 5a and the shaft portion 5b are joined to the base plate 4 by welding or the like, the head portion 5a is engaged (locked) to the distal end side of the anchor 5 with the base plate 4 as a result of joining to the base plate 4. It becomes a state equivalent to being. The anchor 5 is inserted through the insertion hole 4a of the base plate 4 at the head part 5a and the shaft part 5b. When welding is performed, the head part 5a and the shaft part 5b are welded within the insertion hole 4a.

When the tensile force from the base plate 4 is transmitted to the anchor 5, when the structure 1 (2) is made of concrete, the structure 1 A tensile force is transmitted to 2). Drilling 1a around the shaft portion 5b as shown in FIG. 2 is formed, if the filler 7 of the mortar or the like is filled in the drilling 1a, Fig. 5-(a), as shown in FIG. 7 by fixing portion 5c is formed at the distal end of the shaft portion 5b in the tensile force from the base plate 4 is transmitted as a compressive force to the cured body 8 formed in the drilling 1a by curing of the filling material 7 . In the case of FIGS. 5A and 7, when the shaft portion 5 b bears a tensile force, a support pressure is generated on the head portion 5 a side of the fixing portion 5 c, thereby compressing the filler 7 (cured body 8). Power is transmitted. The compressive force is generated between the fixing unit 5c and the base plate 4 or between the fixing unit 5c and the head 5a.

Head 5a of the anchor 5 are separated from the shaft portion 5b, located inside the insertion hole 4a of the base plate 4 as shown in FIG. The anchor 5 itself is mainly made of steel. When the shaft portion 5b of the anchor 5 is separated from both the fixing portion 5c and the head portion 5a, a rod-shaped steel material such as a bolt (anchor bolt), a reinforcing bar, or a steel bar is placed on the shaft portion 5b that bears the tensile force. Although fiber reinforced plastics are also used.

The shaft portion 5b is a section located at least in the structure 1 (2) (in the drilling hole 1a). When the structure 1 (2) is made of concrete, the shaft portion 5b is on the structure 1 (2) side. Ru and a fixing portion 5c to the leading end portion is fixed in the concrete (cured product 8).

  The fixing unit 5c has a cross-sectional area perpendicular to the axis that is larger than a cross-sectional area perpendicular to the axis of the shaft part 5b. For example, when an axial tensile force acts on the shaft part 5b, It is formed in a form suitable for fixing in concrete (hardened body 8) such that a supporting pressure as a reaction force acts on the surface. The fixing portion 5c may be integrated (integrated) with the shaft portion 5b or may be connected (connected) by screwing or the like while being separated from the shaft portion 5b as shown in FIG. 7- (b). When the fixing portion 5c is formed on the shaft portion 5b, the support pressure generated on the surface of the fixing portion 5c on the shaft portion 5b side generates the tensile force from the base plate 4 transmitted to the shaft portion 5b. ) Is added to the adhesion force on the surface of the shaft portion 5b as a force to be transmitted to the structure 1 (2), the transmission efficiency of the tensile force to the structure 1 (2) through the anchor 5 is improved.

  As shown in FIG. 1, when the entire length of the shaft portion 5b (including the fixing portion 5c) of the anchor 5 is fixed in the concrete, the adhesion force of the surface of the shaft portion 5b to the axial tensile force generated in the shaft portion 5b. Thus, since the shaft portion 5b maintains the fixing state mainly by the adhesive force, the surface of the shaft portion 5b may be provided with irregularities for ensuring the adhesive force. The unevenness refers to, for example, a node-like shape formed at intervals in the axial direction, or a groove-like shape formed continuously or intermittently in the axial direction. In addition, when the shaft portion 5b (including the fixing portion 5c) is maintained in a fixed state only by the adhesion force, the diameter of the shaft portion 5b is formed to be larger in proportion to the axial length in order to increase the adhesion force. Sometimes.

  “The shaft portion 5b (including the fixing portion 5c) is fixed in the structure 1” means that, when the structure 1 (2) is an existing concrete structure, the hole 1a drilled in the concrete. The shaft portion 5b is embedded in the filler 7 (cured body 8) by filling the hole 1a with a filler 7 such as concrete, mortar, adhesive, etc. with the shaft portion 5b inserted into the hole 5a. Say that. When the structure 1 (2) is a newly constructed concrete structure, it means that the shaft portion 5b (including the fixing portion 5c) is embedded in the concrete. The filler 7 filled in the drilling holes 1a drilled in the existing concrete refers to a cement-based material that develops compressive strength by being mainly cured, but also includes an organic adhesive.

Also, the weight of the axial force member 3 from the axial force member 3 acts on the base plate 4, and the weight of the base plate 4 acts as a shearing force on all anchors 5 in addition to the weight of the axial force member 3. If all the anchors 5 are inserted through the insertion holes 4a formed in the base plate 4 under the same conditions (Claim 2 ), the shearing force from the base plate 4 acts on all the anchors 5 in a distributed manner. Will be equally charged.

  The shearing force in the direction perpendicular to the axis of the anchor 5 from the base plate 4 is transmitted to the head 5a or the shaft 5b which is a section located in the insertion hole 4a of the anchor 5, and the structure is mainly formed from the shaft 5b. It is transmitted to the body 1 (2). When the structure 1 (2) is made of concrete, the structure 1 (2) is transmitted to the concrete through the support pressure corresponding to the projected area in the shearing force acting direction of the shaft portion 5b and the adhesion force of the peripheral surface of the shaft portion 5b. The weight of the axial force member 3 or the like acts as a vertical shearing force on the anchor 5, but when the opposing structures 1 and 2 are relatively displaced in the direction orthogonal to the opposing direction, as described above, the anchor Since a shearing force in the horizontal direction also acts on the shaft 5, it is appropriate that the shaft portion 5b has a projected area equivalent to the vertical direction and the horizontal direction, such as a circular cross-sectional shape.

  “All anchors 5 are inserted through the insertion holes 4a of the base plate 4 under the same conditions” means that the peripheral surfaces of the head 5a and the shaft 5b of the anchor 5 are all as shown in FIG. It is inscribed in the insertion hole 4a over the circumference, or the clearance between the inner peripheral surface of the insertion hole 4a and the head part 5a or the shaft part 5b is equal as shown in FIG. . “Inscribed” means that the entire peripheral surface of the shaft portion 5b or the like is substantially in contact with the inner peripheral surface of the insertion hole 4a, and includes a case where a minute clearance is formed.

  When the vertical shearing force mainly from the base plate 4 should be applied equally to all the anchors 5, the downward surface of the inner peripheral surface of the insertion hole 4a engages the head portion 5a and the shaft portion 5b vertically downward. Or the clearance between the downward surface of the inner peripheral surface of the insertion hole 4a and the head portion 5a or the shaft portion 5b may be equal. In any example, the force acting in the in-plane direction of the base plate 4 is in a state of being transmitted from the base plate 4 to the head portion 5a of the anchor 5 or the shaft portion 5b.

  When a clearance is secured between the inner peripheral surface of the insertion hole 4a and the head 5a or the shaft portion 5b of the anchor 5 as shown in FIG. 2- (b), the clearance is within the hole 1a. The filler 7 to be filled may wrap around. When the filler 7 is interposed between the insertion hole 4 a and the anchor 5, the shearing force from the base plate 4 is indirectly transmitted to the anchor 5 through the filler 7. When the base plate 4 is directly bonded to the surface of the structure 1 (2), the friction between the base plate 4 and the surface of the structure 1 (2) as shown in FIGS. In order to increase the transmission effect of the shearing force due to the force and the adhesion force, a gap is secured between the surface of the structure 1 (2) and the filler 7 may enter the gap. The filler 7 is filled in the drilling hole 1a in advance and through a gap between the base plate 4 and the surface of the structure 1 (2) or a hole for filling the filler 7 formed in the base plate 4. May be filled through.

  After all, when the hole 1a is formed from the surface of the structure 1 (2) on the base plate 4 side, if a gap is secured between the base plate 4 and the surface of the structure 1 (2), the cutting is performed. The filler 7 filled in the hole 1a fills the gap between the base plate 4 and the structure 1 (2). When a clearance is secured between the insertion hole 4a of the base plate 4 and the head part 5a or the shaft part 5b of the anchor 5, the filler 7 may further fill the clearance in the insertion hole 4a. When the filler 7 is interposed between the base plate 4 and the surface of the structure 1 (2), the shearing force from the base plate 4 is applied through the frictional force and the adhesion force of the cured filler 7 to the structure 1 (2). Therefore, the shear force transmission effect is improved as compared with the case where the shear force is mainly transmitted from the base plate 4 to the structure 1 (2) through the anchor 5.

If the shearing force from the axial force member 3 is not uniformly transmitted to all the anchors 5, the stress may concentrate on the concrete around the specific anchor 5, which may damage the concrete and the like. May not be sufficiently transmitted to the structure 1 (2). On the other hand, in claim 2 , since the shear force from the axial force member 3 is evenly transmitted to all the anchors 5, the concentration of stress on a part of the concrete is eliminated. Safety is improved and the ability to transmit the shearing force from the axial force member 3 to the structure 1 (2) is also improved.

The shear force transmitted from the base plate 4 to the anchor 5 is mainly transmitted from the shaft portion 5b having a large length to the concrete and the hardened body 8 of the structure 1 (2), but the shear force is also transmitted from the head 5a. If possible, transmission skills will improve. The transmission of the shearing force from the head portion 5a of the anchor 5 to the structure 1 (2) is separated from the shaft portion 5b as shown in FIG. 7 and the head portion 5a disposed on the base plate 4 side of the shaft portion 5b. the structure 1 (2) side, is inserted into the structure 1 (2), made possible by insertion portion 5d of the shape continuously in the circumferential direction of the head portion 5a is formed (claim 3) . The shape that continues in the circumferential direction of the head 5a is cylindrical, annular, columnar, or the like.

  In this case, since the insertion portion 5d is engaged with the concrete around the shaft portion 5b or the filler 7 (cured body 8) in the radial direction of the shaft portion 5b (direction perpendicular to the shaft), the head of the anchor 5 is Since the shear force from the base plate 4 received by the part 5a or the shaft part 5b can be dispersed in the axial direction through the head part 5a and the shaft part 5b and transmitted to the structure 1 (2), transmission of the shear force Efficiency is improved.

  In particular, the insertion portion 5d has a shape that is continuous in the circumferential direction of the head portion 5a, and is locked to concrete or the like in a state of being directly inserted (inserted) into the structure 1 (2) (in the concrete or the like). Thus, the shear force in the direction perpendicular to the shaft portion 5b is transmitted directly from the outer peripheral surface of the insertion portion 5d to the concrete existing on the outer peripheral side of the insertion portion 5d. In addition, a shear force in a direction perpendicular to the shaft portion 5b is directly transmitted from the inner peripheral surface of the insertion portion 5d to the concrete existing on the inner peripheral side of the insertion portion 5d or the filler 7 (cured body 8). Yes, transmission from both the outer peripheral surface and the inner peripheral surface of the insertion portion 5d becomes possible.

  When the structure 1 (2) is existing, the insertion portion 5d is positioned in the drilling hole 1a (filler 7) formed in the concrete as shown in FIG. 7, and the drilling hole 1a (filler 7). If the outer peripheral surface of the insertion portion 5d is in contact with the concrete of the structure 1 (2) and the filler 7 (hardened body 8), May come into contact. When the insertion portion 5d is positioned outside the drilling hole 1a, the outer peripheral surface of the insertion portion 5d is in contact with the concrete of the structure 1 (2), and the inner peripheral surface is in contact with the concrete or the filler 7.

  When the structure 1 (2) is an existing structure, the “filler 7 (cured body 8) filled around the shaft portion 5b” is filled in the drilling hole 1a formed in the concrete, Since the structure 1 (2) is constrained by the concrete from the surroundings, the support material received by the filler 7 from the insertion portion 5d does not impair the integrity with the concrete, and the filler 7 is inserted into the insertion portion. The effect of transmitting the support pressure received from 5d to the concrete is less likely to occur.

  In addition, the direction of locking (engagement) of the insertion portion 5d with the concrete or the filler 7 (hardened body 8) coincides with the direction of transmission of the shearing force from the insertion portion 5d to the concrete, and the direction is the filler. Since the direction is perpendicular to the boundary surface between 7 and the surrounding concrete, the occurrence of a situation where the boundary surface between the filler 7 and the concrete peels off when shearing force is transmitted from the insertion portion 5d is also avoided. In addition, when the structure 1 (2) is a new structure, the shaft portion 5b (anchor 5) is directly embedded in the concrete, and there is no formation of the hole 1a and no filling of the filler 7. Separation (peeling) between the material 7 and the concrete does not become a problem.

  When the head portion 5a having the insertion portion 5d is screwed into the shaft portion 5b as shown in FIG. 7, along with the screwing into the shaft portion 5b, the shaft portion 5b is pulled in the axial direction indicated by an arrow. Between the head 5a and the surface of the structure 1 (2) in order to increase the contact pressure of the surface of the head 5a on the structure 1 (2) side to the surface of the structure 1 (2). It works to increase the frictional force and enhance the transmission effect of shearing force through the head 5a. In this case, the head 5a is paired with the fixing portion 5c when the axial tensile force is applied to the shaft portion 5b, thereby restraining the filler 7 (cured body 8) in the drilling hole 1a in the axial direction and filling In order to give the material 7 an axial compressive force, it also serves to increase the shear strength of the cured body 8.

In order to fix the anchor for fixing the base plate to which the both ends of the axial force member, which is installed between the structures facing each other at a distance, are bonded to the structure, to be fixed to the structure with the axial direction of the axial force member directed, The tensile force from the axial force member can be distributed over the entire surface of the base plate and transmitted to the anchor, and the tensile force from the axial force member can be applied equally to all the anchors. As a result, the burden on a specific anchor does not increase, and the dimensions of all anchors can be unified, so that the area occupied by all anchors in the structure can be minimized, and the structure is already existing. In the case of a concrete structure, it is possible to minimize the damage to the frame (concrete).

FIG. 4A is a partial longitudinal cross-sectional view of FIG. 4 showing a state in which a base plate to which end portions of axial force members installed between opposing structures are joined is fixed to one structure using a plurality of anchors. (B) is a horizontal sectional view of (a), and (c) is an arrow view of the xx line of (a). It is the longitudinal cross-sectional view which showed the detail of the example of a connection with the baseplate shown in FIG. 1- (a), (a) is the case where the axial part of an anchor is inscribed in the penetration hole of a baseplate, (b) This is a case where there is a clearance between the shaft portion and the insertion hole. It is the perspective view which showed a mode that the axial force member was erected between the opposing structures which added the damping control frame to the surface. It is the perspective view which expanded and showed a part of FIG. (A) is the partial cross section perspective view which showed the other detailed example of the junction part of the axial force member and base plate in FIG. 4, (b) looked at (a) from the angle close | similar to the axial direction of an axial force member. It is the perspective view which showed the mode. It is the perspective view which showed the example of a connection in the case of joining the edge part of an axial force member to a base plate so that rotation around arbitrary axes is possible. (A) is the longitudinal cross-sectional view which showed the example in case the head of an anchor isolate | separates from a shaft part, and is located in the penetration hole of a baseplate, (b) is the longitudinal cross-sectional view which showed the specific example of (a) is there.

  In FIG. 1, as shown in FIGS. 3 and 4, a built-in damper type axial force member 3 is installed between structures 1 and 2 facing each other at a distance, and both ends of the axial force member 3 are connected to the structures 1 and 2. The specific example of the connection structure of the structure joined to the baseplates 4 and 4 fixed to the surface of is shown. The axial force member 3 is laid between the structures 1 and 2 with the axial direction in the horizontal direction where the structures 1 and 2 face each other, and is joined to the base plate 4 so as to be rotatable at least about the horizontal axis. The axial force member 3 can expand and contract in the axial direction while bearing an axial force when the two structural bodies 1 and 2 are displaced relative to each other, and generates a damping force during expansion and contraction. Each base plate 4 is fixed to the structures 1 and 2 by a plurality of anchors 5.

The base plate 4 is fixed to the surface of the structure 1 (2) in a state where the surface forms a surface perpendicular to the axial direction of the axial force member 3. The plurality of anchors 5 that fix the base plate 4 to the structure 1 (2) are fixed to the structures 1 and 2 through the base plate 4 with the axial direction thereof being parallel to the axial direction of the axial force member 3. The base plate 4 is joined. The structures 1 and 2 may be reinforced concrete, steel reinforced concrete, or the like. Fixing the case structure 1 and 2 of Concrete intends saying that it is embedded in the concrete.

  The axial force members 3 are separated from each other in the axial direction, and are embedded in the main body portions 31 and 31 that are relatively movable in the axial direction, or are connected to both the main body portions 31 and 31. The damper part 32 is composed of a damper part 32. The damper part 32 generates a damping force when the axial force member 3 bears an axial force and the main body parts 31 and 31 move relative to each other in the axial direction.

  The type of the damper constituting the damper part 32 is not limited and may be a friction damper, a viscoelastic damper, or the like. In the case of an oil damper, the damper part 32 is, for example, a cylinder filled with pressure oil and the inside of the cylinder as a hydraulic chamber. Having a separating piston, one main body 31 is integrated with the piston, and the other main body 31 is integrated with the cylinder, so that the two main bodies 31, 31 are relatively movable in the axial direction. The damper part 32 is attenuated by the passage of the pressure oil formed in the piston or arranged in parallel to the cylinder when both the body parts 31 and 31 move relative to each other and the piston moves in the cylinder. Generate power.

  A bracket 33 is joined to the end of each main body 31 on the structure 1 (2) side, and the bracket 33 is at least horizontal to the gusset plate 41 projecting from the surface side of the base plate 4 (axial force member 3 side). It is connected so as to be rotatable around its axis. As shown in FIG. 6, when a connecting member 34 is connected between the bracket 33 and the gusset plate 41 so as to be rotatable around different axes in the bracket 33 and the gusset plate 41, the bracket 33 is The gusset plate 41 is rotatably connected around an arbitrary axis in a plane orthogonal to the material axis of the axial force member 3.

  The connecting member 34 shown in FIG. 6 includes a connecting portion 34a that is rotatably connected to the bracket 33 around an axis in any direction, such as a vertical axis, and an insertion hole of the connecting portion 34a, such as around the horizontal axis, to the gusset plate 41. It has the connection part 34b connected rotatably about the axis | shaft of the direction which cross | intersects (axis). The connecting member 34 has both connecting portions 34a and 34b connected to the bracket 33 and the gusset plate 41 by bolts, pins or the like penetrating the respective insertion holes 33a and 41a, so that the member of the axial force member 3 is connected to the base plate 4. The axial force member 3 is connected (joined) so as to be rotatable around an arbitrary axis in a plane orthogonal to the axis.

  In connecting the bracket 33 to the gusset plate 41 so as to be rotatable about an arbitrary axis, the direction of each insertion hole (shaft) of the connecting portion 34a and the connecting portion 34b may be different from each other, and is orthogonal to each other. There is no need. It is not necessary that the direction of the insertion hole (axis) of each connecting portion 34a, 34b is the vertical direction or the horizontal direction. In FIG. 6, the brackets 33 of the axial force member 3 and the gusset plate 41 of the base plate 4 are formed of a single plate, and the connecting portions 34a and 34b are formed of two plates.

  In the base plate 4, shaft portions 5 b of a plurality of anchors 5 that penetrate a plurality of insertion holes 4 a formed in the base plate 4 are fixed to the structure 1 (2), and the head portion 5 a or the shaft portion 5 b is attached to the base plate 4. By being joined, it is fixed to the structure 1 (2). The axial direction of all the anchors 5 (the axial direction of the insertion hole 4a) faces the axial direction of the axial force member 3, and all the anchors 5 bear the axial tensile force transmitted from the axial force member 3 as a tensile force. The shear force in the direction orthogonal to the shaft portion 5b transmitted from the member 3 is borne as the shear force.

In the anchor 5 and the fixing method to the structure 1 (2), the tensile force from the axial force member 3 is transmitted from the base plate 4 to the head 5a or the nut 6 , and the shear force from the axial force member 3 is transmitted to the base plate. If it is in the state transmitted from 4 to the shaft part 5b, it does not matter at all, and it does not matter whether the thickness (diameter) of the head part 5a and the shaft 5b is different.

When the structures 1 and 2 are reinforced concrete structures or steel reinforced concrete structures, the shaft portion 5b of the anchor 5 is embedded in the concrete, but the embedding method depends on whether the structures 1 and 2 are existing or newly installed. Is different. In the existing case, the shaft portion 5b is inserted into the drilling hole 1a formed in the concrete, and in the case of a new construction, the shaft portion 5b is embedded in the concrete when the structures 1 and 2 are constructed . When the structures 1 and 2 are made of existing concrete, after the shaft portion 5b is inserted into the drilling hole 1a, the gap around the shaft portion 5b is filled with a filler 7 such as mortar, concrete, and adhesive. The filler 7 becomes a hardened body 8 by curing and is integrated with the surrounding concrete.

  1, FIG. 3 to FIG. 5 are adjacent to a plurality of support columns 91 arranged in parallel to each of the opposing existing structural bodies (buildings) 1 and 2 in parallel with each other. A vibration control reinforcement frame 9 comprising a brace 92 with a built-in damper is installed between the columns 91 and 91, and the axial force member 3 is installed horizontally in a direction in which the vibration suppression reinforcement structures 9 and 9 face each other. The example at the time of joining to the composition surface of the structures 1 and 2 is shown. The vibration control reinforcement frame 9 is composed of support columns 91 and 91 that are erected at intervals in the horizontal direction (girder direction) in the plane of the structures 1 and 2 and columns 91 and 91 that are adjacent to each other in the horizontal direction in the frame. Consists of a bridging beam 93 that spans between the struts 91 and 91 and a brace 92 of the same type as the axial force member 3 that is also spanned between the adjacent struts 91 and 91 and that incorporates a damper in the brace body. Is done. The seismic reinforcing frame 9 is joined to the slabs of the structures 1 and 2 at the connecting beam 93 and receives a horizontal force from the structures 1 and 2.

  The support column 91 constituting the seismic retrofitting frame 9 is divided into a plurality of support members 91 a, 91 b, 91 c in the vertical direction. Of the adjacent support columns 91, 91, the support material 91 a on the lower layer side of one support column 91. A brace 92 is constructed between (91b) and the upper strut material 91b (91c) of the other strut 91. Between the support members 91a and 91b separated vertically and between the support members 91b and 91c, an insulating device 94 such as a laminated rubber bearing, a sliding support, an elastic sliding support, a rolling support, etc. is interposed. To do.

  When interlaminar deformation occurs in the structural bodies 1 and 2 in the horizontal direction in the structural surface of the seismic reinforcing frame 9, the connecting beam 93 of the seismic reinforcing frame 9 and the column material joined to the connecting beam 93 through a slab or the like. 91a, 91b, 91c follow the deformation of structures 1 and 2 and move relative to each other, and a damping force is generated by the expansion and contraction of the damper of brace 92 installed between adjacent strut members in the horizontal direction in the construction surface. Then, the vibration energy input to the structures 1 and 2 is absorbed.

  In the example of FIGS. 1 and 3 to 5, the axial force member 3 is erected in such a way as to pass through the columns 91 (column members 91 a to 91 c) of the opposing vibration suppression reinforcement frames 9 and 9. Since 9 is not a requirement of the present invention, it is not a requirement that the axial force member 3 penetrates the support column 91. In the drawing, since the axial force member 3 penetrates the support members 91a to 91c, the axial force member 3 is inserted into a part (web or the like) of the support members 91a to 91c, and the structures 1 and 2 are deformed. The opening for avoiding the contact of the axial force member 3 is formed.

  1 and 4 show two gusset plates 41, 41 arranged in parallel in the horizontal direction on the surface side (axial force member 3 side) of the base plate 4 and projecting by welding or the like with the surface directed in the vertical direction. The bracket 33 of the axial force member 3 is connected to the gusset plates 41, 41, but there may be one gusset plate 41 as shown in FIG.

  When the two gusset plates 41 and 41 are projected from the base plate 4, as shown in FIG. 1- (b), the center line in the width direction (horizontal direction) of the base plate 4 (the center line of the axial force member 3). Since the gusset plates 41 and 41 can be arranged at positions where the top is removed, there is an advantage that the anchor 5 can be arranged on the center line in the width direction of the base plate 4 and the number of the anchors 5 arranged in the width direction of the base plate 4 can be increased. In FIG. 1, a total of nine anchors 5 are attached to a single base plate 4 in three stages in the vertical direction and three rows in the horizontal direction.

  The base plate 4 is directly or indirectly overlapped with the surface of the structure 1 (2) and joined to the structure 1 (2). “Indirectly overlap” means that a filler 7 such as an adhesive, mortar, or concrete is interposed between the surface of the structure 1 (2) and the base plate 4 as illustrated. When the hole 1a is formed in the structure 1 (2), the filler 7 is filled independently from the filler 7 filled in the hole 1a, and the base plate overflows from the hole 1a. 4 and the structure 1 (2) may be filled.

FIG. 2- (a) shows a case where the anchor 5 is composed of a head portion 5a and a shaft portion 5b which are continuous in the axial direction, and the nut 6 is screwed into the head portion 5a protruding from the surface of the base plate 4 to the axial force member 3 side. The reference example in the case where the shaft portion 5b or the head portion 5a is formed in the base plate 4 and is inscribed in the insertion hole 4a through which the anchor 5 is inserted is shown. In this example, since the shearing force in an arbitrary direction from the base plate 4 acts on all the anchors 5 at the same time, the shearing force is equally applied to all the anchors 5.

FIG. 2- (b) shows a reference example in the case where there is a clearance between the inner peripheral surface of the insertion hole 4a and the surface of the shaft portion 5b or the head portion 5a, but the clearances around all the anchors 5 are equal. . In this example, when the filler 7 filled in the drilling hole 1a does not enter the clearance in the insertion hole 4a, the base plate 4 is moved when the relative movement between the base plate 4 and the anchor 5 exceeds the clearance. Is transmitted to the anchor 5, but since the clearances are equal in size, the shear force acts on all the anchors 5 at the same time. When the filler 7 filled in the hole 1a enters the clearance, the shearing force from the base plate 4 immediately acts on the anchor 5 as in the case of FIG.

2- (a) and (b), since the tensile force in the axial direction of the axial force member 3 from the base plate 4 is transmitted to all the nuts 6 that are in close contact with the surface of the base plate 4, Acts equally on all anchors 5. The tensile force transmitted to the nut 6 is transmitted from the nut 6 to the shaft portion 5b, and when the structure 1 (2) is made of concrete, it is transmitted from the shaft portion 5b to the structure 1 (2) through the adhesive force on the peripheral surface thereof. Is done . When the structure 1 (2) is made of concrete, the fixing portion 5c is formed or connected to the tip of the shaft portion 5b as shown in FIGS. 5 and 7, and the head of the fixing portion 5c is connected. The support pressure generated on the surface on the part 5a side is added to the adhesion force of the shaft part 5b, and the tensile force is transmitted to the structure 1 (2).

  Since the supporting pressure generated on the surface of the fixing portion 5c is transmitted as the compressive force in the axial direction of the anchor 5 to the filler 7 (cured body 8) filled in the drilling hole 1a, the tensile force is higher than that without the fixing portion 5c. There is an advantage that the transmission effect to the structure 1 (2) is increased. The compressive force in the axial direction of the axial force member 3 from the base plate 4 is transmitted as a compressive force directly from the back surface (surface on the structure 1 side) of the base plate 4 to the structure 1 (2).

  5- (a) and (b) use the anchor 5 of the form shown in FIG. 7- (b), and fix the base plate 4 stiffened by the rib plate 43 against the bending deformation to the structure 1 (2). The detailed example of FIG. In this example, the rib plate 43 is arranged in a row on the center line in the width direction in the width direction of the base plate 4, and in four positions at positions where the insertion holes 4 a (anchors 5) are removed in the height direction (vertical direction). A rib plate 43 is protruded. In this case, the rib plate 43 may be disposed on both sides of the base plate 4 in the width direction.

  In FIG. 5, the rib plates 43 facing the vertical direction are arranged on the center line in the width direction of the base plate 4, so the anchors 5 are arranged in two rows on both sides in the width direction of the base plate 4, but facing the vertical direction. When the rib plates 43 are arranged in two rows in the width direction so as to divide the width of the base plate 4 into three, for example, the anchors 5 are arranged in three rows in the width direction of the base plate 4 as shown in FIG. , Arrange.

  In the example of FIG. 5, the anchors 5 are arranged on both sides in the thickness direction of the rib plate 43 facing in the vertical direction, and are arranged in three rows per row, corresponding to the height direction of the base plate 4 (vertical direction). ) A rib plate 43 that projects in the horizontal direction is projected at two positions, ie, on both sides and between the middle (center) positions of the anchors 5 and 5 adjacent in the vertical direction, and all the anchors 5 having the tensile force from the axial force member 3 are six. The position of all the anchors 5 and the position of the rib plate 43 facing the horizontal direction are adjusted according to the height dimension of the base plate 4 so as to act evenly. In this case, the center of the anchor 5 is positioned at the center (center) between the rib plates 43 and 43 that are adjacent to each other in the horizontal direction and that face in the horizontal direction.

  In FIG. 5, each rib plate 43 facing in the horizontal direction remains in a length from the rib plate 43 facing in the vertical direction to a line passing through the centers of the anchors 5 arranged in the vertical direction. May have a length up to the department. If each rib plate 43 facing in the horizontal direction has a length from at least the rib plate 43 facing in the vertical direction to a line passing through the centers of the anchors 5 arranged in the vertical direction, it is caused by the tensile force from the axial force member 3. Even if bending deformation occurs in the base plate 4, the bending deformation in the section from the center in the width direction of the base plate 4 to a line passing through the center of the anchor 5 arranged at least in the vertical direction is directed to the horizontal direction. Therefore, it is possible to apply the tensile force from the axial force member 3 to all the anchors 5 evenly until the base plate 4 is bent and deformed.

  7 (a) and 7 (b) show that the head 5a separated from the shaft portion 5b is screwed into the shaft portion 5b and is located in the insertion hole 4a of the base plate 4, and the axial force member 3 side from the head 5a. An example in which a nut 6 different from the head portion 5a is screwed to the axial force member 3 side of the shaft portion 5b that protrudes to the right side. FIGS. 7A and 7B also show an example in which the fixing portion 5c is integrated with or screwed to the tip of the shaft portion 5b on the structure 1 (2) side. ing. In the example of FIG. 7- (b) in which the fixing portion 5c is screwed to the shaft portion 5b, a male screw is formed at least in a connecting section of the shaft portion 5b between the head portion 5a and the fixing portion 5c, while the head portion 5a and the fixing portion. A female screw into which the male screw of the shaft portion 5b is screwed is formed in the entire length of the insertion hole through which the shaft portion 5b is inserted. The fixing portion 5c is formed or connected to the shaft portion 5b when the structure 1 (2) is mainly made of concrete, but the structure 1 (2) in that case is either existing or newly provided. It doesn't matter.

  In the example of FIG. 7, when the head 5a is screwed into the shaft 5b, an axial tensile force is applied to the shaft 5b as shown by an arrow by rotation of the head 5a around the axis, and the structure of the head 5a The back surface on the body 1 (2) side can be brought into close contact with the surface of the structure 1 (2). In this case, the insertion hole 4a of the base plate 4 in which the head portion 5a is accommodated is formed larger than the cross-sectional area of the head portion 5a for the space for rotating the head portion 5a, but after the rotation of the head portion 5a is completed ( After the head portion 5a is fastened to the shaft portion 5b), the extra space in the insertion hole 4a is filled with the filler 7 or the weld metal, and the head portion 5a is placed on the base plate 4 in the in-plane direction and the out-of-plane direction. It will be in the locked state or the equivalent state.

  7- (a) and (b) are also shown in the concrete in the drilling hole 1a or on the outer peripheral side of the drilling hole 1a on the axial structure 1 (2) side of the head 5a separated from the shaft part 5b. By forming the cylindrical insertion portion 5d to enter, the shearing force transmitted from the base plate 4 to the anchor 5 is applied from the shaft portion 5b, and also from the head portion 5a with the concrete or the like of the structure 1 (2). An example of forming the head portion 5a when transmitted to the filler 7 (cured body 8) in the hole 1a is shown. The insertion portion 5d is formed so as to be inscribed or circumscribed on the inner peripheral surface of the drilling hole 1a formed by core removal from the surface side of the structure 1 (2) as shown in the figure. 7) In some cases, it may be located in the outer peripheral side of the hole 1a (filler 7).

  When the head portion 5a has the insertion portion 5d, the insertion portion 5d is engaged with the concrete around the shaft portion 5b in the radial direction (radial direction) of the shaft portion 5b. It is possible to transmit a shearing force in an arbitrary direction orthogonal to the axis of the shaft portion 5b between (2) and the head portion 5a of the anchor 5. The shear force transmission capability in the direction orthogonal to the axis of the shaft portion 5b is larger as the projected area of the insertion portion 5d in that direction is larger. Therefore, in order to increase the shear force transmission capability, the insertion portion 5d is used as the head portion 5a. It is reasonable that it is formed closer to the outer periphery with respect to the axis.

  7- (a) and 7 (b), in order to earn the frictional force generated between the head 5a of the anchor 5 and the surface of the structure 1 (2), the base 5 And a support section 51 having a large cross-sectional area located within the thickness range of the filler 7 entering between the surface of the structure 1 (2) and the cross-sectional area of the base plate 4 within the insertion hole 4a. The head portion 5a itself is formed in a shape having a step in the axial direction.

  In this case, the contact area between the base plate 4 and the structure 1 (2) is increased by the formation of the pressure-bearing portion 51 interposed between the base plate 4 and the structure 1 (2). An increase in frictional force is expected. In addition, when the axial part 5b bears an axial tensile force and an axial compressive force is applied from the fixing part 5c to the concrete around the axial part 5b or the filler 7 (cured body 8), the fixing part 5c Since the supporting pressure part 51 can receive the reaction force of the supporting pressure, the fixing part 5c and the head part 5a (supporting pressure part 51) are paired to apply an axial compressive force to the cured body 8, and the cured body 8 Shear strength can be increased.

  Since the locking portion 52 is locked in the in-plane direction of the base plate 4 in the insertion hole 4 a or is in a state equivalent to the locking, the locking portion 52 receives a shearing force from the base plate 4. It works to transmit to the structure 1 (2). The clearance between the engaging portion 52 and the insertion hole 4a in FIGS. 7A and 7B is also filled with the filler 7 and the weld metal after the head portion 5a is fastened to the shaft portion 5b.

  7B and 5A, the surface of the fixing portion 5c on the side of the shaft portion 5b is formed into a curved surface such as a hyperboloid, so that the fixing portion 5c can be changed to the concrete or the cured body 8. Stability against deformation caused by stress applied when transmitting axial compressive force is enhanced.

  When the fixing portion 5c is formed or connected to the tip of the shaft portion 5b, the axial tensile force generated in the shaft portion 5b from the fixing portion 5c of the anchor 5 to the hardened body 8 and the concrete around the shaft portion 5b is transmitted as a compressive force. At this time, since the fixing portion 5c receives the reaction force from the concrete or the like as a supporting pressure, the entire fixing portion 5c bears a bending moment around the shaft portion 5b. It does not matter whether the shape of the fixing portion 5c is a flat plate or a curved surface. However, when the deformation of the fixing portion 5c is assumed due to the bending moment caused by the support pressure, FIG. As shown in FIG. 7- (b), by forming the surface of the fixing portion 5c on the head 5a side into a curved surface, the fixing portion 5c can be provided with stability and safety against bending deformation. .

  Forming the fixing unit 5c in a curved surface means that the surface on the head 5a side of the fixing unit 5c is formed in a curved surface such as a convex spherical surface, an elliptical curved surface, or a conical curved surface on the head 5a side. However, even if the fixing portion 5c is flat, a bending moment due to a bearing pressure is formed by forming a protrusion (rib) or the like on at least one of the surfaces opposite to the head 5a side of the fixing portion 5c. Therefore, the fixing portion 5c does not necessarily have a curved surface shape, and may have a flat plate shape.

1. Structure, 1a ... Drilling hole, 2. Structure,
3 ... Axial force member, 31 ... Body part, 32 ... Damper part,
33 ... Bracket, 34 ... Connecting material, 34a ... Connecting portion, 34b ... Connecting portion,
4 ... Base plate, 4a ... Insertion hole, 41 ... Gusset plate, 42 ... Pin, 43 ... Rib plate,
5 ... Anchor, 5a ... Head, 51 ... Bearing part, 52 ... Locking part, 5b ... Shaft part, 5c ... Fixing part, 5d ... Insertion part,
6 …… Nut,
7 ... filler, 8 ... cured material,
9 ... Damping reinforcement frame, 91 ... Column, 91a, 91b, 91c ... Column material, 92 ... Brace, 93 ... Connecting beam, 94 ... Insulating device.

Claims (3)

Between the concrete structures facing each other at a distance, the two structures are expanded and contracted in the axial direction while bearing an axial force when they are relatively displaced in the opposite direction, and a damping force is generated during expansion and contraction. A damper built-in type axial force member is installed with the axial direction facing in a direction in which the structure is opposed, and at least the axial force member is mounted on a base plate in which both ends of the axial force member are fixed to the surface of each structure. Are joined around a horizontal axis in a plane perpendicular to the axial direction of
A plurality of anchors facing in a direction parallel to the axial direction of the axial force member are fixed to the structure through the base plate, and are joined to the base plate,
A shaft portion embedded in the structure of the anchor includes a fixing portion on a distal end portion side having a cross-sectional area larger than a cross-sectional area perpendicular to the shaft portion,
The head portion separated from the shaft portion is screwed into the shaft portion on the shaft force member side of the shaft portion, and is in a state of being in close contact with the surface of the structure.
The head part and the fixing part are paired with a hardened body made of a filler or concrete sandwiched between the structure in which the shaft part is embedded, and with the screwing of the head part into the shaft part, A structure connection structure , wherein the hardened body or concrete is in a state of applying an axial compressive force . The structure connecting structure according to claim 1 , wherein the plurality of anchors are inserted through insertion holes formed in the base plate under the same conditions. The insertion part of the shape inserted in the inside of the said structure and continuing in the circumferential direction of the said head is formed in the said structure side of the head of the said anchor , or Claim 1 characterized by the above-mentioned. The connection structure of the structure according to 2 .

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