JP4233023B2 - Seismic reinforcement joint structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for joining a seismic reinforcement member to a structural member.
[0002]
[Prior art]
A seismic reinforcement method for joining seismic reinforcement members such as braces to the intersections of column beams has been implemented for seismic reinforcement of structures.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-184031 [Patent Document 2]
Japanese Patent Laid-Open No. 10-317684 [Patent Document 3]
JP-A-9-279858 [Patent Document 4]
Japanese Patent Laid-Open No. 11-50690
When the structure is a steel frame structure, a joint fitting for joining a seismic reinforcement member such as a brace to a crossing portion of the column beam is joined by field welding.
Further, when the structure is a reinforced concrete structure or a steel reinforced concrete structure, a steel frame is installed in order to install a seismic reinforcement member.
In addition to the above, inventions for joining seismic reinforcement members have been made.
Japanese Patent Laid-Open No. 10-184031 (hereinafter referred to as “conventional example 1”) discloses a high-strength metal fitting made of a steel plate having a convex cross section for joining a seismic reinforcing member to a column of a reinforced concrete structure or a steel reinforced concrete structure. The structure fixed with a strength fiber sheet is disclosed.
Japanese Patent Application Laid-Open No. 10-317684 (hereinafter referred to as “conventional example 2”) discloses a configuration in which a through hole is formed in a beam and a member for seismic reinforcement is joined by a pin inserted into the through hole. .
Japanese Patent Laid-Open No. 9-279858 (hereinafter referred to as “Conventional Example 3”) has a structure in which a through hole is formed in a beam and a joining base of an earthquake-resistant reinforcing member is fixed by a PC steel rod through the through hole. Is disclosed.
Japanese Patent Application Laid-Open No. 11-50690 (hereinafter referred to as “conventional example 4”) discloses a configuration in which a joint fitting for joining a seismic reinforcing member to a column beam having a reinforced concrete structure is fixed via an anchor bolt. .
[0005]
[Problems to be solved by the invention]
However, in the case of steel-framed joining by field welding, the welding strength is reduced due to the field welding in an unreasonable posture, and curing around the welding point is necessary for field welding, and the concrete slab is placed on the beam. If it is installed, it will require a chipping work to remove it, and noise will be generated along with the chipping work. Was.
In the case of a reinforced concrete structure or a steel-framed reinforced concrete structure, installation work of a steel frame in a limited space is required, which causes a problem that the construction period is prolonged.
Furthermore, in a steel-steel rebar structure, the internal rebar becomes an obstacle and the problem that a long anchor cannot be constructed generate | occur | produces.
In Conventional Example 1, a high-strength fiber sheet must be used, resulting in a problem of high cost.
In Conventional Example 2, there is a problem that the work range can be applied only up to the adjacent room and with independent columns.
In Conventional Example 3, since the beam is penetrated and joined with the PC steel rod, drilling work is required in the slab concrete, noise and vibration are generated, and the concrete strength against the tension of the PC steel rod is required. Will occur.
In Conventional Example 4, there is a problem that it cannot be applied unless the concrete thickness is thick.
[0006]
The present invention provides a highly durable earthquake-resistant construction that can solve the problems of the conventional joint structure for seismic reinforcement in a short period of time, is low in cost, can limit the construction area, and can use a space other than the construction area. An object is to provide a reinforcing joint structure.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the first invention of the present invention is a seismic reinforcement joint structure, in each of the structural members, a joining bracket for joining the seismic reinforcement member to the intersection of structural members extending in two different directions. On the other hand, it is a joint structure for seismic reinforcement that joins by combining one or more fixing means selected from adhesives, post-installed anchors and high strength bolts, and the structural member extending in one direction is a pillar. Yes, the structural member extending in the other direction is a concrete slab on the beam, and the seismic reinforcement member is a brace,
The joint fitting includes a first joint plate joined to the surface of the column, a second joint plate joined to the surface of the concrete slab, and a gusset plate welded to each of the first joint plate and the second joint plate. Configured, the seismic reinforcement member such as brace is connected to the gusset plate via a plurality of connecting bolts,
The second joining plate projects from the end of the gusset plate toward the beam center side,
The fixing means for the first joining plate in the joint fitting to the column is a high-strength bolt, and the fixing means for the second joining plate in the joint fitting to the concrete slab on the beam is a combination of an adhesive and a post-installed anchor. In addition, the second joining plate is fixed to the concrete slab on the beam by using the adhesive and the post-installed anchor in the base end side and the portion protruding from the end of the gusset plate toward the beam center side. It is characterized by.
[0009]
The second invention is characterized in that in the joint structure for seismic reinforcement of the first invention, the size of the gusset plate is controlled so that the rigidity of the joint metal fitting can correspond to the displacement of the structural member at the time of the earthquake. To do.
[0010]
[Action]
With the structure of the present invention, in the steel structure, reinforced concrete structure, and steel reinforced concrete structure, there is no noise vibration associated with the slab concrete crushing work, so it is possible to perform seismic reinforcement work while using the structure, and on the upper and lower floors of the reinforcement work Does not affect. Moreover, in addition to eliminating the need for slab concrete chipping work, it is also unnecessary to repair concrete after chipping, thereby shortening the work period. Since no on-site welding is used, curing around the weld location is unnecessary, and it is possible to reliably join the seismic reinforcement members compared to the conventional technology, which has reliable welding strength by on-site welding in an unreasonable posture. It becomes the joint structure for reinforcement.
In reinforced concrete structures and steel reinforced concrete structures, instead of the steel frame for attaching seismic reinforcement members such as braces, it becomes a joint fitting consisting of a gusset plate and a joint plate, so steel processing can be greatly simplified, and existing structures It is not necessary to build a steel frame in the narrow space inside, and the construction period can be shortened.
In the steel reinforced concrete structure, the length of the post-installed anchor is short, so it can be constructed without worrying about the internal steel frame.
Regardless of the steel structure, the steel reinforced concrete structure, or the reinforced concrete structure, the size of the gusset plate of the joint metal fittings should be such that it has sufficient rigidity to follow the deformation of the structural members during an earthquake. The joint metal is prevented from being peeled off from the structural member due to the deformation of the structural member, so that the joint structure for earthquake-resistant reinforcement having high seismic performance is obtained.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. The reference embodiment shown in FIG. 1 is an application of the present invention to a structure in which a concrete slab 3 is placed on a column 1 and a beam 2. A joint fitting 5 for joining a seismic reinforcement member 4 such as a brace to the intersection of the pillar 1 and the concrete slab 3 is joined to the first joining plate 6 joined to the face of the pillar 1 and the face of the concrete slab 3. And a gusset plate 8 that is welded in a direction orthogonal to each of the first and second bonding plates 6 and 7. An earthquake-resistant reinforcing member 4 such as a brace is connected to the gusset plate 8 via a plurality of connecting bolts 9. The first joining plate 6 and the column 1 are joined with an adhesive 10 such as an epoxy resin adhesive, and the second joining plate 7 and the concrete slab 3 are joined with the adhesive 10.
[0012]
The reference form shown in FIG. 2 joins the 1st joining plate 6 and the pillar 1 with the adhesive agent 10, and joins the 2nd joining plate 7 and the concrete slab 3 with the some post-installation anchor 11. FIG. The post-construction anchor 11 cuts a shallow hole in the concrete slab 3, accommodates a capsule in which, for example, a two-liquid mixed solidifying liquid is separately accommodated in the shallow hole, and inserts a bolt to destroy the capsule. A chemical anchor that mixes and solidifies the liquid to fix the bolt to the concrete slab 3 and a mechanical anchor that expands the tip of the bolt and fixes the bolt to the concrete slab 3.
[0013]
In the reference form shown in FIG. 3, the first joining plate 6 and the pillar 1 are joined with the adhesive 10, and the second joining plate 7 and the concrete slab 3 are combined with the adhesive 10 and the plurality of post-installed anchors 11. It is what is joined.
[0014]
In the reference form shown in FIG. 4, the first joining plate 6 and the pillar 1 are joined with a plurality of high-strength bolts 12, and the second joining plate 7 and the concrete slab 3 are joined with an adhesive 10.
[0015]
In the reference form shown in FIG. 5, the first joining plate 6 and the column 1 are joined by a plurality of high-strength bolts 12, and the second joining plate 7 and the concrete slab 3 are joined by a plurality of post-installed anchors 11. It is.
[0016]
In the embodiment shown in FIG. 6, the first joining plate 6 and the column 1 are joined with a high-strength bolt 12, and the second joining plate 7 and the concrete slab 3 are used in combination with an adhesive 10 and a plurality of post-installed anchors 11. It joins with.
[0017]
The size of the gusset plate 8 of the joint fitting 5 is such that a plurality of connecting bolts 9 necessary for joining the end portions of the seismic reinforcement member 4 such as braces can be arranged, and the first and second joint plates 6, 7 are arranged. The required weld length is as small as possible, and the rigidity of the joint fitting 5 can be adapted to the deformation of columns, beams, and concrete slabs 3 that are structural members during an earthquake. This is because if the size of the gusset plate 8 is large, the rigidity of the joining metal fitting 5 increases, and the deformation of the structural member during an earthquake cannot be dealt with, and the joining between the joining plate and the structural member is destroyed.
[0018]
Above, the reference or embodiment employs the case of bonding the bonding metal 5 at the intersection of the concrete slab 3 on the pillar 1 and the beam 2 as an example, and the bar each form as shown in FIG. 7 It can be used at intersections of concrete beams and intersections with other structural members such as truss structures.
[0019]
【The invention's effect】
With the structure of the present invention, in the steel structure, reinforced concrete structure, and steel reinforced concrete structure, there is no noise vibration associated with the slab concrete crushing work. Does not affect. Moreover, in addition to eliminating the need for slab concrete chipping work, it is also unnecessary to repair concrete after chipping, thereby shortening the work period. Since no on-site welding is used, curing around the welding site is not required, and it is possible to join the seismic reinforcement members more reliably than the conventional technology, which has reliable welding strength by on-site welding in an unreasonable posture. It becomes the joint structure for reinforcement.
In reinforced concrete structures and steel reinforced concrete structures, the steel frame processing can be greatly simplified by replacing the steel frame for attaching seismic reinforcement members such as braces with a gusset plate and an adhesive plate. It is not necessary to embed a steel frame in the narrow space inside, and the construction period can be shortened and the construction cost can be reduced.
Furthermore, in the steel-framed reinforced concrete structure, since the post-installed anchor is short, it can be constructed without interfering with the internal steel frame.
Regardless of the steel structure, the steel reinforced concrete structure, or the reinforced concrete structure, the size of the gusset plate of the joint metal fittings should be such that it has sufficient rigidity to follow the deformation of the structural members during an earthquake. The joint metal is prevented from being peeled off from the structural member due to the deformation of the structural member, so that the joint structure for earthquake-resistant reinforcement having high seismic performance is obtained.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention.
FIG. 2 is a diagram showing an embodiment of the present invention.
FIG. 3 is a diagram showing an embodiment of the present invention.
FIG. 4 is a diagram showing an embodiment of the present invention.
FIG. 5 is a diagram showing an embodiment of the present invention.
FIG. 6 is a diagram showing an embodiment of the present invention.
FIG. 7 is a diagram showing an embodiment of the present invention.
[Explanation of symbols]
1: Column 2: Beam 3: Concrete slab 4: Seismic reinforcement member 5: Joint metal fitting 6: First joint plate 7: Second joint plate 8: Gusset plate 9: Connecting bolt 10: Adhesive 11: Post-construction anchor 12 : High strength bolt 29: Upper guide part

Claims (2)

A joint structure for seismic reinforcement that joins to each structural member a joint fitting for joining a seismic reinforcement member to an intersection of structural members extending in two different directions, wherein the structural member extends in one direction. The structural member that is a column and extends in the other direction is a concrete slab on the beam, and the seismic reinforcement member is a brace,
The joint fitting includes a first joint plate joined to the surface of the column, a second joint plate joined to the surface of the concrete slab, and a gusset plate welded to each of the first joint plate and the second joint plate. Configured, the seismic reinforcement member such as brace is connected to the gusset plate via a plurality of connecting bolts,
The second joining plate projects from the end of the gusset plate toward the beam center side,
The fixing means for the first joining plate in the joint fitting to the column is a high-strength bolt, and the fixing means for the second joining plate in the joint fitting to the concrete slab on the beam is a combination of an adhesive and a post-installed anchor. In addition, the second joining plate is fixed to the concrete slab on the beam by using the adhesive and the post-installed anchor in the base end side and the portion protruding from the end of the gusset plate toward the beam center side. A joint structure for seismic reinforcement, characterized by The joint structure for earthquake-proof reinforcement according to claim 1, wherein the size of the gusset plate is controlled so that the rigidity of the joint metal fitting can correspond to the displacement of the structural member during an earthquake.

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