JP6068840B2 - Seismic reinforcement structure for column beam structures - Google Patents

Description

  The present invention relates to a seismic reinforcement structure for a column beam structure that reinforces a column beam structure of a building, and more particularly, a seismic reinforcement structure for a column beam structure that reinforces a column beam structure of a building in which columns and beams are made of steel. It is about.

  2. Description of the Related Art Conventionally, as a method for reinforcing column beam frames of steel buildings, for example, there is a method of installing reinforcing members such as a cane and braces on the column beam frames of these buildings. By installing such a reinforcing member on the column beam structure of the building, the proof strength of the building can be increased against the horizontal force. At this time, in order to sufficiently transmit the stress generated in the column beam frame to the reinforcement member, it is necessary to join and integrate the end portion of the reinforcement member to the column beam frame. Therefore, the joining method is important.

  As this kind of joining method, welding is well known. Specifically, a gusset plate that fixes the end of a reinforcing member such as a cane or brace with a bolt or the like is attached to a column or beam of a column beam frame by welding, and the attached gusset plate is reinforced such as a cane or brace There is a method of fixing the end of the member with a bolt or the like.

  Moreover, in this kind of joining method, joining methods that do not use welding, such as bolt joining, are also known.

  Moreover, there exists a technique of patent document 1 as a technique relevant to this invention. Patent Document 1 is a technique for fixing a steel material of a temporary structure. Specifically, the superposition flange of the erection joint part between steel frames is sandwiched and joined using a vise. Since the technique described in Patent Document 1 relates to a temporary structure, it is a technique on the premise that the vise is removed after use.

Japanese Patent Laid-Open No. 08-284909

  Here, in the case of welding, it is necessary to weld a gusset plate to a column or beam of a column beam structure on site. In this case, a large-scale welding curing is required for the purpose of preventing the occurrence of a fire or the like, leading to an increase in cost. Further, when the on-site environment is bad (for example, when it is necessary to perform welding upward), a welding defect may occur, and there is a concern about a decrease in seismic performance. Therefore, a joining method that does not require on-site welding is desired.

  On the other hand, bolt joining is a joining method that does not require on-site welding, but in this joining method, it is necessary to make holes for passing bolts through the flanges of columns and beams. As a result, the cross-sectional area of the column or beam is reduced, so that the proof stress of the column or beam may be reduced.

  The technique described in Patent Document 1 fixes a steel material of a temporary structure, and does not perform seismic reinforcement of a building. Since this vise is used for a temporary structure, it is assumed that it can be easily removed, and is not suitable as a structural member of a permanent building. Further, this vise has a problem that it is easy to tilt because the steel material is fixed at one point between the tips of a pair of screw threads screwed into a pair of female screw holes formed on a common axis. When this tilts, the sandwiched steel material may be displaced and the installation joint part may come off.

  The problem to be solved by the present invention is that seismic reinforcement is possible by attaching a reinforcing member without performing on-site welding and without drilling a hole in a pillar or beam. An object of the present invention is to provide a seismic reinforcement structure for a column beam frame that can be reinforced stably.

  In order to solve the above problems, the seismic retrofit structure for a column beam structure according to the present invention is an earthquake resistant structure for a column beam structure in which a reinforcement member is installed and reinforced on a column beam structure of a building in which columns and beams are made of steel. In the reinforcing structure, the fixed surface portion of the gusset plate having a structure in which an attachment surface portion to which an end portion of the reinforcing member is attached is formed upright from a surface of the fixed surface portion that is installed in alignment with the flange surface of the column or beam. The flange is fixed to the flange surface of the column or beam, and the fixed surface portion of the gusset plate together with the flange is formed through at least one of the upper and lower ends of the U-shaped metal fitting body in the vertical direction. Two or more female screw holes are provided along the width direction of the end, and two or more clamping bolts are screwed into one end of the female screw hole. Member placed in the opening The clamping bolts that are clamped by clamping brackets that clamp at two or more locations in the vertical direction, the gusset plate is fixed to the column or beam, and the clamping bolts that are screwed into the female screw holes of the bracket body are loosened. In this state, the end of the reinforcing member is attached to the gusset plate.

  At this time, it is preferable that the measure for preventing the loosening and the removal is taken by using a lock nut on the clamping bolt screwed into the female screw hole of the metal fitting body. Further, two or more clamping metal fittings are used on the same surface side bordered by the web of the pillar or the same surface bordered by the web of the beam, and the clamping metal fittings are connected by a coupling metal fitting. It is preferable.

  And in the seismic reinforcement structure of the column beam frame concerning the present invention, the section steel which constitutes the above-mentioned pillar and beam is H-section steel or channel-shaped steel, and between a pair of flanges of the section steel which constitutes a pillar and a beam The tensile and compression steel materials acting on the tensile force and the compressive force may be arranged and fixed to improve the tensile strength and the compressive strength of the shape steel constituting the column and the beam.

  According to the seismic reinforcement structure for a column beam frame according to the present invention, the gusset plate is fixed to the column or beam by clamping the fixing surface portion of the gusset plate together with the flange of the column or beam with the clamping bracket. Since the reinforcing member is installed on the column beam frame by attaching the end of the reinforcing member to the plate, there is no need to perform on-site welding and without drilling holes in the column or beam flange. Seismic reinforcement is possible by attaching a reinforcing member.

  Further, according to the clamping metal fitting, two or more clamping bolts are used for at least one of the upper and lower ends of the U-shaped metal fitting main body, and the gusset plate of the gusset plate together with the column or beam flange. Since the fixing surface is clamped at two or more locations from the top and bottom, the phenomenon that the vise itself tends to tilt is less likely to occur when the steel material is fixed at one point, as in the conventional vise, and stable over a long period of time. Can be reinforced.

  Here, if the clamping bolts screwed into the female screw holes of the metal fittings are provided with measures to prevent loosening, the clamping bolts will not be loosened over a long period of time. Can be reinforced. Therefore, it is suitable as a structural member of a permanent building. In addition, it is assumed that the clamp bolts screwed into the female screw holes of the metal fittings body are provided with measures to prevent them from being removed easily. Is preferred.

  At this time, if measures are taken to prevent loosening and removal by using a lock nut on the clamping bolt screwed into the female screw hole of the metal fitting body, the clamping bolt will be surely loosened over a long period of use. It is suppressed and reinforced stably over a long period of time.

  And, if two or more clamps used on the same surface side of the column web or the same surface side of the beam web are connected to each other by the connection bracket, individual clamps Since the phenomenon of tilting is less likely to occur, it can be reinforced stably over a long period of time. In addition, if it is possible to prevent the clamping bracket from being inclined in this way, it is possible to suppress a decrease in yield strength, and to expect an increase in the bending rigidity of the entire column beam frame.

  And the shape steel that constitutes the column and beam is H-shaped steel or grooved steel, and the tensile and compression-resistant steel that acts on the tensile force and compression force is placed between the pair of flanges of the shape steel that constitutes the column and beam. If it is fixed, the tensile strength and the compressive strength of the section steel constituting the column and the beam are improved, so that excellent performance is exhibited.

It is a front view of the seismic reinforcement structure of the column beam frame concerning one embodiment of the present invention, and is an example using a cane as a reinforcement member. It is the figure which showed an example of the clamping metal used in the earthquake-proof reinforcement structure of the column beam frame of FIG. It is the figure which showed the state by which the flange of the shape steel and the fixed surface part of the gusset plate were clamped using the clamp metal fittings in the earthquake-proof reinforcement structure of the column beam frame of FIG. It is the figure which was another example of the clamping metal used in the earthquake-proof reinforcement structure of the column beam frame of this invention, and shows what the measures which prevent a loosening and removal using a lock nut are taken. In the seismic reinforcement structure for a column beam frame of the present invention, it is a diagram showing a state in which a flange of a shape steel and a fixed surface portion of a gusset plate are clamped by using a clamping bracket, and a clamping bolt is connected by a coupling bracket. It is the figure which showed the state. FIG. 2 is a diagram showing a state in which a tensile and compressive steel material acting on a tensile force and a compressive force is disposed and fixed between a pair of flanges of an H-shaped steel in the seismic reinforcing structure of the column beam frame shown in FIG. 1. It is AA sectional drawing of FIG. FIG. 9 is a modified example of FIG. 7, and is a cross-sectional view of a tensile resistant and compressive steel material having a different shape. It is the figure which showed the example of the structure where the clamping bolt is screwed in from the both sides of an up-down direction, which is another example of the clamping bracket used in the earthquake-proof reinforcement structure of the column beam frame of this invention. It is a front view of the seismic reinforcement structure of the column beam frame concerning other embodiments of the present invention, and is an example using a brace as a reinforcement member. FIG. 11 is a diagram showing a state in which a tensile and compressive steel material acting on a tensile force and a compressive force is arranged and fixed between a pair of flanges of an H-shaped steel in the seismic reinforcement structure of the column beam frame shown in FIG. 10.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a seismic reinforcement structure for a column beam frame according to an embodiment of the present invention, and is an example using a cane as a reinforcement member. FIG. 2 is a view showing an example of a clamp fitting used in the seismic reinforcement structure of the column beam frame of FIG. FIG. 3 is a diagram showing a state in which the flange of the shape steel and the fixed surface portion of the gusset plate are clamped by using clamp metal fittings in the seismic reinforcement structure of the column beam frame of FIG. In the following clamps, for convenience, the direction is defined as the vertical direction, but this does not specify the mounting direction in the building.

  In the seismic reinforcement structure 10 for a column beam frame according to an embodiment of the present invention shown in FIG. 1, the building to which the seismic reinforcement is applied is made of a steel structure. The column 12 and the beam 14 of the column beam frame are each made of H-section steel. By installing the cane 16 as a reinforcing member for the column beam frame having such a configuration, the column beam frame is subjected to seismic reinforcement. For the cane 16, for example, a steel material such as H-shaped steel or groove-shaped steel is used.

  The cane 16 resists horizontal force (force caused by inter-layer deformation) acting on the building due to vibration such as an earthquake, and reinforces the joint part of the column beam frame. It is installed so as to connect between the column 12 and the beam 14 in the vicinity of the section. A gusset plate 18 is used as a mounting bracket for attaching the end of the cane 16 to the column 12 or the beam 14 of the column beam frame. The gusset plate 18 is attached to the flanges 12a and 14a inside the column beam frame.

  The gusset plate 18 is provided with a fixed surface portion 18a installed with its surface aligned with the flange surface of the column 12 or the beam 14, and a mounting surface portion 18b formed upright from the surface of the fixed surface portion 18a. The mounting surface portion 18b is provided with a fixing hole provided for fixing the end portion of the cane 16 as a reinforcing member with the bolt 42, and the mounting surface portion 18b of the gusset plate 18 is joined to the mounting surface portion 18b of the gusset plate 18 by bolting. The end is attached. Since the gusset plate 18 includes a fixed surface portion 18a and a mounting surface portion 18b, the cross-sectional shape is T-shaped. The gusset plate 18 is fixed to the flange 12a of the column 12 or the flange 14a of the beam 14 by a fixing surface portion 18a. A clamp 20 is used to fix the gusset plate 18 to the flange 12a or the flange 14a.

  As shown in FIG. 2, the clamp metal fitting 20 has a U-shaped bracket body 22, and a member disposed in the U-shaped opening 22 c is clamped in the vertical direction. One end portion 22b (shown as the lower end portion 22b in FIG. 2) of the upper and lower end portions 22a and 22b of the metal fitting body 22 is provided with a female screw hole 24b formed penetrating in the vertical direction. Is provided. As shown in FIG. 3, two female screw holes 24b are provided along the width direction of one end 22b (lower end 22b). A clamping bolt 26 is screwed into each of the female screw holes 24b formed in one end portion 22b (lower end portion 22b). Two clamping bolts 26 are provided at one end 22b (lower end 22b) corresponding to the number of female screw holes 24b formed at one end 22b (lower end 22b). It is used. Therefore, the member arranged in the U-shaped opening 22c is clamped at two locations.

  The clamping metal fitting 20 has a female screw on one end 22b (lower end 22b) also on the other end 22a of the metal fitting 22 (shown as the upper end 22a in FIG. 2). A female screw hole 24a is provided at a position sharing the axis with the hole 24b. The shaft portion of the fixing bolt 28 is screwed into the female screw hole 24a of the other end portion 22a (upper end portion 22a). The fixing bolt 28 is disposed on an axis common to the clamping bolt 26, and serves as a receiving portion for the clamping bolt 26 when clamping a member disposed in the U-shaped opening 22c.

  The fixing bolt 28 is screwed into the female screw hole 24a from the inside of the U-shaped opening 22c, and the head of the fixing bolt 28 is located inside the other end 22a (upper end 22a). In the mold opening 22c). Therefore, the head of the fixing bolt 28 becomes a receiving portion for the clamping bolt 26. Since the head of the fixing bolt 28 has a diameter larger than that of the shaft portion, there is an advantage that the contact area of the receiving portion with respect to the member to be clamped is large, and the clamping bracket 20 is not easily tilted.

  As with the clamping bolt 26, it is possible to turn the fixing bolt 28, but normally, the fixing bolt 28 is not rotated, and the clamping bolt 26 is rotated to place it in the U-shaped opening 22c. The clamped member is clamped. The fixing bolt 28 can be turned, for example, when adjusting a position (a position in the vertical direction) as a receiving portion with respect to the clamping bolt 26. Therefore, if it is not necessary to turn, the fixing bolt 28 may be completely fixed (fastened) to the metal fitting body 22.

  In order to fix the gusset plate 18 to the column 12 or the beam 14 of the column beam frame, a clamping bracket 20 is used. First, the surface of the fixed surface portion 18a of the gusset plate 18 is aligned with the flange surface 12a inside the column 12 of the column beam frame or the flange surface 14a inside the beam 14. Next, the fixing surface portion 18a of the gusset plate 18 is clamped together with the clamp member 20 together with the flange surface 12a or the flange surface 14a. At this time, the clamping bolts 26 screwed into the female screw holes 24b of the metal fitting body 22 are provided with measures for preventing loosening and removal. The measures for preventing loosening and removal include measures for preventing loosening, measures for preventing removal, and measures for preventing both loosening and removal.

  The measure for preventing the loosening is to prevent the clamping bolt 26 in the clamping state from being loosened. In addition, since the seismic reinforcement is maintained over a long period of time, it is preferable that the clamping bolts 26 are not removed after clamping or cannot be easily removed. However, when the position where the gusset plate 18 is to be installed is not fixed, the removal is allowed in the case where the position is changed.

  The measure for preventing the removal is to prevent the clamping bolt 26 in the clamping state from being easily removed. That is, since the seismic reinforcement is maintained over a long period of time, the clamping bolt 26 is not removed after clamping or cannot be easily removed. However, when the position where the gusset plate 18 is to be installed is not fixed, the removal is allowed in the case where the position is changed.

  As an example of measures for preventing such loosening and removal, the example shown in FIG. 4 can be given. FIG. 4 shows a structure in which a lock nut 30 is used for the clamping bolt 26 screwed into the female screw hole 24 b of the metal fitting body 22. The lock nut 30 is installed on the outer side in the up-down direction of one end 22b (lower end 22b). By tightening the lock nut 30 with respect to the one end 22b (lower end 22b), the one end 22b and the lock nut 30 are tightened in the direction in which they are fastened to each other (the direction of the arrow in FIG. 4). Thus, by forming a so-called double nut structure, the screw is difficult to loosen, and the clamping bolt 26 cannot be easily removed.

  A plurality of clamps 20 can be used for one gusset plate 18. The number may be determined in consideration of the mounting strength of the gusset plates 18. The clamping bracket 20 can be installed on both sides of the front and back with a good balance with the web 12b of the pillar 12 or the web 14b of the beam 14 interposed therebetween. Then, the column beam frame is reinforced by attaching the end portion of the cane 16 as a reinforcing member to the gusset plate 18 fixed to the column 12 or the beam 14 and installing the rod 16 on the column beam frame.

  According to the seismic reinforcement structure 10 for a column beam frame as described above, the fixing surface portion 18a of the gusset plate 18 together with the flange 12a of the column 12 or the flange 14a of the beam 14 is clamped by the clamping bracket 20, so that the column 12 or Since the gusset plate 18 is fixed to the beam 14 and the end portion of the cane 16 as the reinforcing member is attached to the gusset plate 18, the cane 16 as the reinforcing member is installed on the column beam frame. Seismic reinforcement is possible by attaching the cane 16 as a reinforcing member without performing the above welding and without making a hole in the flange 12a of the column 12 or the flange 14a of the beam 14.

  At this time, in the clamping metal 20, two clamping bolts 26 are used for one end 22b (for example, the lower end 22b) of the upper and lower ends 22a, 22b of the U-shaped metal fitting body 22. Since the fixing surface portion 18a of the gusset plate 18 is clamped at two places from the vertical direction together with the flange 12a of the column 12 or the flange 14a of the beam 14, the clamping bracket 20 itself is not easily tilted. Generation | occurrence | production of the proof stress fall by etc. is suppressed, and the earthquake-proof reinforcement structure 10 will be maintained stably over a long period of time.

  And, by taking measures to prevent loosening of the clamping bolt 26 screwed into the female screw hole 24b of the metal fitting body 22, loosening of the clamping bolt 26 due to long-term use can be suppressed, and stable over a long period of time. The earthquake-proof reinforcement structure 10 will be maintained. Therefore, it is suitable as a structural member of a permanent building. Further, by taking measures to prevent the clamping bolts 26 screwed into the female screw holes 24b of the metal fitting body 22 from being removed, the clamping bolts 26 cannot be easily removed. Therefore, it is suitable as a structural member of a permanent building.

  Here, in the seismic reinforcement structure 10 of the column beam frame, two or more clamps 20 are provided on the same surface side with the web 12b of the column 12 or the same surface side with the web 14b of the beam 14 as a boundary. Although used, as shown in FIG. 5, two or more clamping metal fittings 20 may be connected to each other by a connection metal fitting 32 or a connection metal fitting 33. FIG. 5 is a view showing a state in which the clamping bolt is connected by the connecting metal fitting. FIG. 5A is a view as seen from the side of the U-shaped opening 22 c of the clamp metal fitting 20, and FIG. 5B is a view seen from the side of the clamp metal fitting 20.

  The connecting metal fitting 32 connects the adjacent metal fittings 20a, 20b,... To each other, and the upper and lower sides of one end portion 22b (lower end portion 22b) of the metal fittings 20a, 20b,. It is installed outside in the direction. In the coupling metal 32, insertion holes 32a through which the clamping bolts 26 are inserted are formed at positions corresponding to the female screw holes 24b of the clamping metal fittings 20a, 20b,. The inserted clamping bolts 26 are screwed into the respective female screw holes 24b of the clamping brackets 20a, 20b, ... from the outer side in the vertical direction of one end 22b of the clamping brackets 20a, 20b, .... When the coupling metal nut 31 for fixing the coupling metal 32 is tightened in the state, the coupling metal nut 31 is connected to the one end 22b of the clamping metal fittings 20a, 20b,. Fastened (fixed) to the outside.

  At this time, the connecting metal nut 31 is interposed via the connecting metal 32, but is tightened to the outside of one end 22b of the clamping metal fittings 20a, 20b,. The coupling metal nuts 31 are tightened in the direction in which they are tightened together. For this reason, the connecting metal nut 31 also has a function as a lock nut for locking the clamping bolt 26, so that the screw is hardly loosened, and the clamping bolt 26 cannot be easily removed. .

  The connecting metal fitting 33 also connects adjacent clamping metal fittings 20a, 20b,..., And the vertical direction of the other end 22a (upper end 22a) of the clamping metal fittings 20a, 20b,. It is installed outside. In the connecting fitting 33, insertion holes 33a through which the connecting fitting bolts 34 for fixing the connecting fitting 33 are inserted are respectively provided at positions corresponding to the female screw holes 24a of the clamping fittings 20a, 20b,. The connecting metal fitting bolt 34 inserted into the insertion hole 33a is formed between the other end 22a of the clamping metal fittings 20a, 20b,. When screwed into the respective female screw holes 24a and tightened, the connection fitting 33 is fastened (fixed) to the outside of the other end 22a of the clamp fittings 20a, 20b,. The

  In this way, the clamp metal fittings 20a, 20b,... Are connected via the connection metal fitting 32 and the connection metal fitting 33. A force is transmitted between the clamps 20 via the connecting bracket 32 and the connecting bracket 33.

  Note that the shapes of the connection fitting 32 and the connection fitting 33 are not particularly limited. For example, it may be a plate-shaped steel material or a shape steel such as an L-shaped steel or a grooved steel. The insertion holes 32a and 33a may be screw holes into which the clamping bolts 26 are screwed.

  In the structure shown in FIG. 5, compared to the structure shown in FIG. 3, two clamping metal fittings 20 are shown. A connecting metal fitting 32, a connecting metal fitting 33, and a connecting metal fitting that connect these clamping metal fittings 20. The only difference is that a connection fitting nut 31 for fastening 32 and a connection fitting bolt 34 for fastening the connection fitting 33 are provided, and the other configuration is the same as that shown in FIG. is there.

  Therefore, according to such a configuration, for example, even if one of the clamp members 20 (for example, 20a) is inclined, the other clamp member 20 (for example, 20b) that is connected via the connecting member 32 or the connecting member 33 is used. ) Resists the tilting of one clamp 20. Thereby, since it can suppress that each clamp metal fitting 20 inclines, the fall of yield strength by this, etc. can be prevented. Thereby, the bending rigidity of the whole column beam frame can be raised. Therefore, the seismic reinforcement structure 10 is stably maintained over a long period of time.

  Here, in the seismic reinforcement structure 10 for the column beam frame, when the column 12 and the beam 14 of the column beam frame are made of H-shaped steel or groove-shaped steel, bending or compression of the flange by tensile force is performed. Measures can be taken to prevent buckling of the web due to force. FIG. 6 is a diagram showing a state in which a tensile compression-resistant steel material acting on a tensile force and a compressive force is arranged and fixed between a pair of flanges of an H-shaped steel in the seismic reinforcement structure 10 of the column beam frame shown in FIG. It is. FIG. 7 is a cross-sectional view taken along the line AA of FIG. FIG. 8 is a modified example of FIG. 7 and is a cross-sectional view of a steel material for tensile / compression resistant with different shapes.

  The tensile compression-resistant steel material 52 includes a first flat plate portion 54a disposed along the flange in surface contact with the inner surface of one flange of the H-shaped steel constituting the column 12 or the beam 14, and the other of the H-shaped steel. A second flat plate portion 54b disposed along the flange in surface contact with the inner surface of the flange, and a first flat plate extending in a direction perpendicular to the surfaces of the first flat plate portion 54a and the second flat plate portion 54b. And a connecting portion 56 that connects the portion 54a and the second flat plate portion 54b. The connecting portion 56 is provided at both ends of the first flat plate portion 54a and the second flat plate portion 54b and on the inner side between the both ends, and functions as a reinforcing rib to increase the tensile strength and compression strength of the tensile and compressive steel material 52. ing.

  The steel material 52 for tension and compression is disposed between a pair of flanges 12a1 and 12a2 of the H-shaped steel constituting the column 12. Further, the steel material 52 for tensile and compression compression is disposed between a pair of flanges 14a1 and 14a2 of H-shaped steel constituting the beam 14. The H-section steel constituting the beam 14 will be described as an example. On one flange 14a1 side of the H-section steel, together with the one flange 14a1, the fixed surface portion 18a of the gusset plate 18 and the first steel material 52 for tensile compression / compression The flat plate portion 54a is clamped by the clamp fitting 20, and the second flat plate portion 54b of the tensile compression-resistant steel material 52 is clamped by the clamp fitting 60 together with the other flange 14a2 on the other flange 14a2 side of the H-shaped steel. As a result, the tensile-compressing steel material 52 is fixed to the H-shaped steel. The clamping metal 60 has the same configuration as the clamping metal 20.

  According to the seismic reinforcement structure 50 of the column beam frame shown in FIG. 6, the tensile strength and compression strength of the H-shaped steel constituting the column 12 and the beam 14 are improved by the steel material 52 for tensile compression. Is done.

  In addition, in the seismic reinforcement structure 50 of the column beam frame shown in FIG. 6, in order to fix the steel material 52 for tension and compression between a pair of flanges of H-shaped steel (between 12a1-12a2 or 14a1-14a2). For example, if there is a slab or a wall on the other flange (12a2 or 14a2) side (the back flange side), the clamping metal fitting 60 is used. It is not possible. In such a case, as shown in FIG. 8, a steel material 62 for tensile and compression having another shape can be used.

  The other steel members 62 for tensile and compression compression stand up from the flat plate portion 64 disposed along the flange 14a1 in surface contact with the inner surface of one flange 14a1 of the H-shaped steel constituting the beam 14. In this way, the upright portion 66 arranged along the web 14b in surface contact with the surface of the H-shaped steel web 14b, and the flat plate portion 64-standing upright extending in a direction perpendicular to the surface of the flat plate portion 64 and the surface of the upright portion 66 A connecting portion 68 that connects the portions 66 is provided. The connecting portion 68 is provided at both ends of the flat plate portion 64 and the upright portion 66 and inside the both ends, functions as a reinforcing rib, and increases the tensile strength and compression strength of the other steel members 62 for tensile and compression resistance. .

  The other tensile compression-compressing steel material 62 is disposed between a pair of flanges 14a1 and 14a2 of H-shaped steel constituting the beam 14. On one flange 14a1 side of the H-shaped steel, together with the one flange 14a1, the fixed surface portion 18a of the gusset plate 18 and the flat plate portion 64 of another tensile compression-resistant steel material 62 are clamped by the clamping metal fitting 20. On the web 14b side of the H-shaped steel, bolts are bolted using a bolt 70 through a through-hole penetrating the surface of the web 14b and the surface of the upright portion 66 disposed along the web 14b. An upright portion 66 of the steel material 62 is fixed to the H-shaped steel web 14b. Although FIG. 8 shows the H-section steel constituting the beam 14, other tensile and compression-resistant steel materials 62 can be similarly arranged for the H-section steel constituting the column 12.

  According to the seismic reinforcement structure of the column beam frame shown in FIG. 8, the tensile strength and compression strength of the H-shaped steel constituting the column 12 and the beam 14 are improved by the other steel members 62 for tensile compression. Demonstrated.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above embodiment, as shown in FIG. 1, the clamping bolts 26 of the clamping bracket 20 are arranged so as to face the inside of the column beam frame. This is for the sake of simplicity, and the clamping bolts 26 may be arranged so as to face the outside of the column beam frame.

  In the above embodiment, as shown in FIG. 2, the other end portion 22a (upper end portion 22a) is provided with a female screw hole 24a into which the fixing bolt 28 is screwed. The other end portion 22a (upper end portion 22a) may not have the female screw hole 24a. In this case, the receiving portion for the clamping bolt 26 is the other end 22a (upper end 22a), but on the same axis as the female screw hole 24b of one end 22b (lower end 22b). At this position, a boss portion that protrudes from the inner surface of the other end portion 22a (upper end portion 22a) may be formed integrally with the metal fitting body 22 and used as a receiving portion.

  Moreover, in the said embodiment, as shown in FIG. 2, although the fixing bolt 28 which has a head is shown, the fixing bolt 28 can also be used as the volt | bolt which does not have a head.

  In the above embodiment, as shown in FIG. 2, the clamping bolt 26 is screwed into the female screw hole 24 b of the one end 22 b (lower end 22 b) of the clamping bracket 20. This is because the tightening process of the clamping bolt 26 is small, and as shown in FIG. 9, the clamping screw 26 and the female screw hole 24a of the other end 22a (upper end 22a) are also connected to the clamping bolt 26. It is also possible to use a clamping bracket 36 in which clamping screws 35 having the same structure are inserted and clamped in the vertical direction by turning the clamping bolts 26 and 35 on both sides.

  Moreover, in the said embodiment, as shown in FIGS. 2-3, the female screw hole 24b of one edge part 22b (lower edge part 22b) and the female edge of the other edge part 22a (upper edge part 22a) are shown. The screw holes 24a are provided on a common axis, but they may be provided on different axes. Moreover, in the said embodiment, as shown in FIG. 3, the two female screw holes 24b and the clamping bolt 26 are provided along the width direction of one edge part 22b (lower edge part 22b). However, since it is sufficient that two or more of these are provided along the width direction, three or more of these may be provided along the width direction.

  Moreover, in the said embodiment, as shown in FIG. 5, although the clamping metal fittings 20a, 20b, ... are connected via the connection metal fitting 32 or the connection metal fitting 33, it connects using a connection metal fitting. In that case, it may be connected via only one of the connection fitting 32 and the connection fitting 33.

  In the above embodiment, the present invention has been described by taking the wand 16 as an example of the reinforcing member. However, as shown in FIG. 10, a brace 38 made of shape steel or the like is used as the reinforcing member. The present invention can also be applied to the structure. In the case of the structure shown in FIG. 10, the gusset plate 40 has both a fixed surface portion 40 a installed in alignment with the flange surface 12 a of the column 12 and a fixed surface portion 40 b installed in alignment with the flange surface 14 a of the beam 14. And is fixed to both the column 12 and the beam 14 by using a clamp fitting 20. The end of the brace 38 is fixed to the gusset plate 40 with a bolt 42. When the brace 38 is used, the gusset plate may be fixed to only one of the column 12 and the beam 14.

  Also in the structure shown in FIG. 10, as in the structure shown in FIG. 1, the flange due to the tensile force of the H-shaped steel or the groove-shaped steel using the tensile-resistant steel 52 or other tensile-resistant steel 62. Measures can be taken to prevent web buckling due to bending or compressive forces. Note that FIG. 11 shows the seismic reinforcement structure of the column beam frame shown in FIG. It is the figure which showed the state made.

  Moreover, in the said embodiment, although the gusset plate 18 and the reinforcement member 16 are demonstrated as a different thing, of course in the present invention, these may be made into an integral thing.

  Moreover, in the said embodiment, although the pillar 12 and the beam 14 consist of H-section steel, other shape steels, such as a channel steel, may be sufficient. Further, in the above embodiment, the present invention has been described by taking a steel structure as an example of a building to which seismic reinforcement is applied. However, a building to which such a seismic reinforcement structure can be applied is a steel structure. It is not limited to the above, and a reinforced concrete structure or a steel reinforced concrete structure may be used.

DESCRIPTION OF SYMBOLS 10 Seismic reinforcement structure of column beam frame 12 Column 12a Column flange 14 Beam 14a Beam flange 16 Reinforcement member (bracket)
18 Gusset plate 18a Fixed surface portion 20 of gusset plate Clamping bracket 22 Clamping bracket body 24b Female thread hole

Claims (4)

In the seismic reinforcement structure of a column beam structure in which a reinforcing member is installed and reinforced on a column beam frame of a building in which columns and beams are made of steel,
A gusset plate composed of a fixed surface portion and a mounting surface portion formed upright from the fixed surface portion is attached to the end portion of the reinforcing member at the mounting surface portion.
Fixed surface of the gusset plate is installed together face to the flange surface of the pillar or beam,
A U-shaped bracket body and clamping bolts are provided, and the bracket body has a female screw hole formed in at least one of the upper and lower ends of the U-shape so as to penetrate in the vertical direction. has two or more along, the one Kyoshime fitting two or more of said Kyoshime bolt per end Ru is threaded against the female screw hole, the combined surface within the opening of the U-shaped The flange surface and the fixed surface portion are arranged,
Two or more clamping bolts abut against one end of the flange surface and the fixed surface portion, which are arranged in a plane, and are fastened at two or more locations to join the flange surface and the fixed surface portion. the gusset plates are secured to the pillar or beam Te,
An anti-seismic reinforcement structure for a column beam structure, wherein a clamping bolt screwed into a female screw hole of the metal fitting body is provided with a measure for preventing loosening and removal.   2. The column beam frame according to claim 1, wherein the measure for preventing the loosening and removal is taken by using a lock nut on a clamping bolt screwed into a female screw hole of the metal fitting body. Seismic reinforcement structure.   Two or more clamps are used on the same side of the column web or the same side of the beam web, and the two or more clamps are connected by a coupling bracket. The seismic reinforcement structure for a column beam structure according to claim 1 or 2, wherein The shape steel constituting the column and the beam is H-shaped steel or grooved steel, and the tensile and compression-resistant steel material acting on the tensile force and the compression force is disposed and fixed between a pair of flanges of the shape steel constituting the column and the beam. The seismic reinforcement structure for a column-beam frame according to any one of claims 1 to 3, wherein the tensile strength and the compressive strength of the section steel constituting the columns and beams are improved.

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