JP2020059987A - Aseismatic reinforcing structure - Google Patents

Abstract

To provide an aseismatic reinforcing structure for enhancing the yield strength of an existing concrete wall, with improved workability.SOLUTION: An aseismatic reinforcing structure 40 comprises an existing frame 20 having a pair of existing columns 22 and an existing upper beam 24U and an existing lower beam 24L installed between the pair of existing columns 22, an existing concrete wall 30 installed on the existing frame 20, and an additionally placed reinforcing part 42 for connecting a wall face 30S of the existing concrete wall 30 to a lower face 28S of the existing upper beam 24U.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seismic reinforcement structure.

  There is known an earthquake-proof reinforcing structure that reinforces an existing concrete wall (see, for example, Patent Documents 1 and 2).

JP-A-8-49329 JP, 2005-220591, A

  However, in the above-mentioned seismic retrofit structure, since the overstrike range becomes wider according to the size of the existing concrete wall, it may take time and effort for the construction.

  The present invention has been made in view of the above facts, and an object thereof is to increase the yield strength of an existing concrete wall while improving the workability.

  The seismic reinforcement structure according to claim 1 includes an existing frame having a pair of existing columns, an upper existing beam and a lower existing beam installed on the pair of existing columns, and an existing structure provided on the existing frame. A concrete wall, a wall surface of the existing concrete wall, and a connecting portion that connects the lower surface of the upper existing beam or the upper surface of the lower existing beam.

  According to the earthquake-proof reinforcing structure of the first aspect, the existing frame has a pair of existing columns, and an upper existing beam and a lower existing beam that are erected on the pair of existing columns. In addition, existing concrete walls are installed on the existing frame. The wall surface of the existing concrete wall and the lower surface of the upper existing beam, or the wall surface of the existing concrete wall and the upper surface of the lower existing beam are connected by a connecting portion.

  Here, for example, when the joining strength between the existing concrete wall and the upper existing beam is low, the binding force of the existing concrete wall due to the upper existing beam will be low, and it is possible that the existing concrete wall will not be able to exert its sufficient strength at the time of an earthquake. There is a nature.

  On the other hand, in the present invention, as described above, the wall surface of the existing concrete wall and the lower surface of the upper existing beam or the upper surface of the lower existing beam are connected by the connecting portion. Therefore, at the time of earthquake, stress is transmitted between the existing concrete wall and the upper existing beam or between the existing concrete wall and the lower existing beam via the connecting portion. Therefore, the joint strength between the existing concrete wall and the upper existing beam or between the existing concrete wall and the lower existing beam can be increased. In other words, the binding force of the existing concrete wall by the upper existing beam or the lower existing beam is increased.

  As a result, the strength of the existing concrete wall can be sufficiently exerted at the time of an earthquake, so that the strength of the existing concrete wall can be increased. That is, in the present invention, the proof stress of the existing concrete wall can be highly evaluated by increasing the joint proof stress of the existing concrete wall and the upper existing beam or the lower existing beam.

  Further, in the present invention, the reinforcement range can be narrowed as compared with the case where the entire surface of the existing concrete wall is additionally reinforced. Therefore, the workability is improved. Furthermore, in the present invention, since the wall thickness of the existing concrete wall does not increase, it is possible to reduce the influence on the room when the seismic reinforcement is completed.

  As described above, according to the present invention, it is possible to improve the workability and reduce the influence on the room, while increasing the yield strength of the existing concrete wall.

  The seismic reinforcement structure according to claim 2 is the seismic reinforcement structure according to claim 1, wherein the connecting portion is formed between the wall surface of the existing concrete wall and the lower surface of the upper existing beam or the lower existing beam. It has an additional reinforcement portion extending over the upper surface.

  According to the seismic reinforcement structure according to claim 2, the connecting portion has the additional reinforcement portion (extension) extending over the wall surface of the existing concrete wall and the lower surface of the upper existing beam, or the wall surface of the existing concrete wall and the upper surface of the lower existing beam. It has a reinforced concrete reinforcement part.

  Accordingly, at the time of an earthquake, stress is transmitted between the existing concrete wall and the upper existing beam or between the existing concrete wall and the lower existing beam via the additional reinforcement portion. Therefore, the joint strength between the existing concrete wall and the upper existing beam or between the existing concrete wall and the lower existing beam can be increased. In other words, the binding force of the existing concrete wall by the upper existing beam or the lower existing beam is increased. Therefore, the proof stress of the existing concrete wall can be increased.

  The seismic reinforcement structure according to claim 3 is the seismic reinforcement structure according to claim 1, wherein the connecting portion is formed between the wall surface of the existing concrete wall and the lower surface of the upper existing beam or the lower existing beam. A connecting plate extending to the upper surface is provided.

  According to the seismic reinforcement structure of claim 3, the connecting portion has a connecting plate extending over the wall surface of the existing concrete wall and the lower surface of the upper existing beam, or the wall surface of the existing concrete wall and the upper surface of the lower existing beam. There is.

  Thereby, at the time of an earthquake, stress is transmitted between the existing concrete wall and the existing upper beam or the existing lower beam through the connecting plate. As a result, the joint strength between the existing concrete wall and the upper existing beam or the lower existing beam is increased. In other words, the binding force of the existing concrete wall by the upper existing beam or the lower existing beam is increased. Therefore, the proof stress of the existing concrete wall can be increased.

  As described above, according to the earthquake-proof reinforcement structure according to the present invention, it is possible to improve the workability and enhance the proof stress of the existing concrete wall.

It is the elevation view which looked at the peripheral part of the existing structure concerning a first embodiment from the outside. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1. It is sectional drawing corresponding to FIG. 2 which shows the existing frame to which the earthquake-proof reinforcement structure which concerns on 1st embodiment was applied. It is sectional drawing corresponding to FIG. 2 which shows the existing frame to which the earthquake-proof reinforcement structure which concerns on 2nd embodiment was applied. (A) is a sectional view corresponding to FIG. 2 showing a modified example of the upper side existing beam, and (B) is a sectional view corresponding to FIG. 2 showing a modified example of the seismic reinforcement structure. (A) is a sectional view corresponding to FIG. 2 showing a modified example of the upper side existing beam, and (B) is a sectional view corresponding to FIG. 2 showing a modified example of the seismic reinforcement structure.

(First embodiment)
First, the first embodiment will be described.

(Existing structure)
FIG. 1 shows an existing structure (existing building) 10 before the seismic reinforcement structure 40 according to the present embodiment is applied. The existing structure 10 has an existing frame 20 and an existing concrete wall 30.

  The existing frame 20 and the existing concrete wall 30 are arranged on the outer peripheral portion of the existing structure 10. That is, the existing frame 20 of the present embodiment is an outer peripheral frame (external peripheral frame), and the existing concrete wall 30 of the present embodiment is an outer wall (existing concrete outer wall). The existing concrete wall 30 is not limited to the outer wall and may be the inner wall.

(Existing frame)
The existing frame 20 has a pair of existing columns 22, an upper existing beam 24U and a lower existing beam 24L. The pair of existing columns 22 are made of steel, reinforced concrete, or steel reinforced concrete. An upper existing beam 24U and a lower existing beam 24L are installed on the pair of existing columns 22. The upper existing beam 24U and the lower existing beam 24L are arranged at intervals in the vertical direction.

  The upper existing beam 24U and the lower existing beam 24L have the same configuration. Therefore, hereinafter, the configuration of the upper existing beam 24U will be described, and the description of the configuration of the lower existing beam 24L will be appropriately omitted.

  As shown in FIG. 2, the upper existing beam 24U has a steel frame structure. More specifically, the upper existing beam 24U is made of H-shaped steel. The upper existing beam 24U has a pair of upper flange portion 26 and lower flange portion 28 facing each other in the vertical direction, and a web portion 29 connecting the upper flange portion 26 and the lower flange portion 28.

  The existing slab 12 is provided on the upper existing beam 24U. The existing slab 12 is joined to the upper existing beam 24U through the stud 14 provided on the upper surface of the upper flange portion 26 of the upper existing beam 24U. The existing concrete wall 30 is joined to the upper existing beam 24U.

  The upper existing beam 24U is not limited to the H-section steel, but may be I-section steel or C-section steel.

(Existing concrete wall)
The existing concrete wall 30 is, for example, a load bearing wall, an earthquake resistant wall, or a miscellaneous wall. The existing concrete wall 30 is made of reinforced concrete and has a plurality of wall reinforcements 32 embedded therein. The existing concrete wall 30 is arranged outside the upper existing beam 24U and the lower existing beam 24L, and is joined to the side surfaces of the upper existing beam 24U and the lower existing beam 24L, respectively.

  The joint structure between the upper portion of the existing concrete wall 30 and the upper existing beam 24U and the joint structure between the lower portion of the existing concrete wall 30 and the lower existing beam 24L have the same configuration. Therefore, below, the joint structure of the upper part of the existing concrete wall 30 and the upper existing beam 24U will be described, and the description of the joint structure of the lower part of the existing concrete wall 30 and the lower existing beam 24L will be omitted.

  The upper portion of the existing concrete wall 30 is joined to the side surface of the upper existing beam 24U via the concrete joint 34. The concrete joint portion 34 is provided over the entire length of the upper existing beam 24U. Further, the concrete joint portion 34 is provided over the upper portion of the existing concrete wall 30 and the web portion 29 of the upper existing beam 24U. The concrete joint portion 34 is made of reinforced concrete and has a plurality of connecting ribs 36 embedded therein.

  The connecting line 36 is bent in a C shape and is arranged between the upper part of the existing concrete wall 30 and the upper existing beam 24U. Further, the plurality of connecting lines 36 are arranged at intervals in the material axis direction of the upper existing beam 24U. One end side of each connecting bar 36 is joined to the upper existing beam 24U by welding or the like. The other end of each connecting bar 36 is embedded in the upper part of the existing concrete wall 30. Thus, the upper existing beam 24U and the existing concrete wall 30 are joined by the concrete joining portion 34 in which the plurality of connecting bars 36 are embedded.

  The reinforcement of the concrete joint 34 can be changed as appropriate. Although not shown, the left and right ends of the existing concrete wall 30 are joined to the pair of existing columns 22, respectively.

(Seismic reinforcement structure)
FIG. 3 shows an existing frame 20 to which the seismic reinforcement structure 40 according to the present embodiment is applied. The seismic retrofit structure 40 includes an additional reinforcement portion 42 that connects the lower surface 28S of the upper existing beam 24U and the upper wall surface 30S of the existing concrete wall 30, the upper surface of the lower existing beam 24L (the upper surface of the existing slab 12), and the existing structure. It has an additional reinforcement portion (not shown) that connects the lower wall surface of the concrete wall 30.

  The additional reinforcement portion 42 provided on the upper existing beam 24U and the additional reinforcement portion provided on the lower existing beam 24L have the same configuration. Therefore, hereinafter, the additional reinforcement portion 42 provided on the upper existing beam 24U will be described, and the description of the additional reinforcement portion provided on the lower existing beam 24L will be appropriately omitted. The additional reinforcement portion 42 is an example of a connecting portion.

  The additional reinforcement portion (upper concrete reinforcement portion) 42 provided on the lower side of the upper existing beam 24U is formed of concrete (post-increase concrete) in a rectangular cross section. The additional reinforcement portion 42 is arranged over the lower surface 28S of the upper existing beam 24U and the wall surface 30S of the upper portion of the existing concrete wall 30. More specifically, the additional reinforcement portion 42 is arranged along the corner formed by the lower surface 28S of the upper existing beam 24U and the upper wall surface 30S of the existing concrete wall 30.

  The additional reinforcement portion 42 is provided over the entire length of the upper existing beam 24U, and both ends thereof are connected to the pair of existing columns 22. The additional reinforcement section 42 connects the lower surface 28S of the upper existing beam 24U and the upper wall surface 30S of the existing concrete wall 30.

  A plurality of studs 44 are joined to the lower surface 28S of the lower flange portion 28 of the upper existing beam 24U by welding or the like. The plurality of studs 44 are embedded in the additional reinforcement portion 42. The upper existing beam 24U and the additional reinforcement portion 42 are joined via these studs 44.

  Instead of the studs 44, deformed bar or the like may be used. The stud 44 is an example of a connecting member.

  A plurality of connecting lines 46 are embedded in the wall surface 30S above the existing concrete wall 30. One end side of the plurality of connecting bars 46 is fixed to the existing concrete wall 30 via an anchor member such as a chemical anchor (not shown). Further, the other end sides of the plurality of connecting lines 46 are embedded in the additional reinforcement portion 42. The existing concrete wall 30 and the additional reinforcement portion 42 are connected to each other through these connecting bars 46.

  A plurality of spiral reinforcements (split reinforcement reinforcements) 48 are embedded in the additional reinforcement portion 42. The spiral streak 48 is formed by a spirally wound reinforcing bar or the like. The spiral lines 48 are arranged with the axial direction as the material axial direction of the upper existing beam 24U. Further, each spiral streak 48 is embedded in the additional reinforcement portion 42 so as to overlap the stud 44 or the connecting streak 46 described above when the upper existing beam 24U is viewed from the material axis direction. The additional reinforcement portion 42 is reinforced by these spiral lines 48.

  It should be noted that, in the additional reinforcement portion 42, another reinforcing bar may be embedded instead of the spiral bar 48. The spiral muscle 48 is an example of a reinforcing muscle. Further, the spiral muscle 48 can be omitted as appropriate.

(Action)
Next, the operation of the first embodiment will be described.

  As shown in FIG. 1, according to the earthquake-proof reinforcement structure according to the present embodiment, the existing frame 20 includes a pair of existing columns 22, and an upper existing beam 24U and a lower existing beam that are installed on the pair of existing columns 22. 24L. The existing frame 20 is provided with an existing concrete wall 30. The upper wall surface 30S of the existing concrete wall 30 and the lower surface 28S of the upper existing beam 24U are connected by the additional reinforcement portion 42, as shown in FIG. Further, the lower wall surface of the existing concrete wall 30 and the upper surface of the lower existing beam 24L are connected by an additional reinforcement portion (not shown).

  Here, for example, when the joining strength between the existing concrete wall 30 and the upper existing beam 24U is low, the binding force of the existing concrete wall 30 by the upper existing beam 24U becomes low, so that the existing concrete wall 30 has a sufficient yield strength during an earthquake. It may not be possible to exert it.

  On the other hand, in the present embodiment, the upper wall surface 30S of the existing concrete wall 30 and the lower surface 28S of the upper existing beam 24U are connected by the additional reinforcement portion 42. Therefore, at the time of an earthquake, stress is transmitted between the existing concrete wall 30 and the upper existing beam 24U via the additional reinforcement portion 42. Therefore, the joint strength between the existing concrete wall 30 and the upper existing beam 24U is increased. In other words, the binding force of the existing concrete wall 30 by the upper existing beam 24U is increased.

  Similarly, the lower wall surface 30S of the existing concrete wall 30 and the lower surface of the lower existing beam 24L are connected by the additional reinforcement portion. By this additional reinforcement portion, the joint strength between the existing concrete wall 30 and the lower existing beam 24L is increased.

  As a result, since the existing concrete wall 30 can sufficiently exert its proof stress at the time of an earthquake, the proof stress of the existing concrete wall 30 is enhanced. In other words, in the present embodiment, it is possible to highly evaluate the proof stress of the existing concrete wall 30 by increasing the joining proof stress of the existing concrete wall 30 and the upper existing beam 24U and the lower existing beam 24L.

  As described above, in the present embodiment, it is possible to increase the proof stress of the existing concrete wall 30 without additionally reinforcing the existing concrete wall 30. In addition, in the present embodiment, the reinforcement range can be narrowed as compared with the case where the entire surface of the existing concrete wall 30 is overstretched. Therefore, the workability is improved.

  Furthermore, when the entire surface of the existing concrete wall 30 is additionally struck, since the wall thickness of the existing concrete wall 30 becomes thick, the indoor space may be narrowed. On the other hand, in this embodiment, the proof stress of the existing concrete wall 30 can be enhanced without increasing the wall thickness of the existing concrete wall 30, that is, without narrowing the indoor space.

  As described above, in the present embodiment, the workability can be improved, and the yield strength of the existing concrete wall 30 can be increased without narrowing the indoor space.

  The additional reinforcement portion 42 is provided over the entire length of the upper existing beam 24U or the lower existing beam 24L. As a result, the joint strength between the existing concrete wall 30 and the existing upper beam 24U and the existing lower beam 24L is increased. Moreover, the additional reinforcement portion 42 is connected to the pair of existing columns 22. As a result, the joint strength between the existing concrete wall 30 and the existing upper beam 24U and the existing lower beam 24L is further increased. Therefore, the yield strength of the existing concrete wall 30 is further increased.

  Further, a plurality of spiral streaks 48 are embedded in the additional reinforcement portion 42. By reinforcing the additional reinforcement portion 42 with these spiral lines 48, damage to the additional reinforcement portion 42 is suppressed.

  In the present embodiment, the additional reinforcement portion 42 is provided over the entire length of the upper existing beam 24U and the lower existing beam 24L, but the additional reinforcement portion is part of the upper existing beam 24U and the lower existing beam 24L. It is also possible to provide it. Moreover, the shape and arrangement of the additional reinforcement portion 42 can be changed as appropriate.

(Second embodiment)
Next, a second embodiment will be described. In addition, in the second embodiment, members and the like having the same configurations as those in the first embodiment are denoted by the same reference numerals, and description thereof will be appropriately omitted.

  FIG. 4 shows an existing frame 20 to which the seismic strengthening structure 50 according to the second embodiment is applied. The seismic strengthening structure 50 connects the wall surface 30S of the upper part of the existing concrete wall 30 and the lower surface 28S of the upper existing beam 24U to the connecting plate 52, the lower wall surface of the existing concrete wall 30 and the upper surface of the lower existing beam 24L. It has the connection plate 52 which connects.

  The connecting plate 52 provided on the upper existing beam 24U and the connecting plate provided on the lower existing beam 24L have the same configuration. Therefore, hereinafter, the connecting plate 52 provided on the upper existing beam 24U will be described, and the description of the connecting plate provided on the lower existing beam 24L will be appropriately omitted. The connecting plate 52 is an example of a connecting portion.

  The connecting plate 52 provided on the upper existing beam 24U is formed of a metal plate such as a steel plate bent in an L shape. The connecting plate 52 is arranged over the lower surface 28S of the upper existing beam 24U and the wall surface 30S of the upper portion of the existing concrete wall 30. More specifically, the connecting plate 52 is arranged along the corner formed by the lower surface 28S of the upper existing beam 24U and the upper wall surface 30S of the existing concrete wall 30. The connecting plate 52 connects the lower surface 28S of the upper existing beam 24U and the upper wall surface 30S of the existing concrete wall 30.

  Specifically, one end side of the connecting plate 52 is joined by welding or the like in a state of being overlapped with the lower surface 28S of the lower flange portion 28 of the upper existing beam 24U. The one end side of the connecting plate 52 is not limited to welding, but may be joined to the lower flange portion 28 of the upper existing beam 24U by a bolt or the like.

  The other end of the connecting plate 52 is overlapped with the wall surface 30S of the upper portion of the existing concrete wall 30. A nut 56 is joined to the other end of the connecting plate 52 to a post-construction anchor 54 such as a chemical anchor protruding from the wall surface 30S of the upper portion of the existing concrete wall 30. The existing concrete wall 30 and the upper existing beam 24U are connected via the connection plate 52.

(Action)
Next, the operation of the second embodiment will be described.

  As shown in FIG. 4, according to the earthquake-proof reinforcement structure 50 according to the present embodiment, the upper wall surface 30S of the existing concrete wall 30 and the lower surface 28S of the upper existing beam 24U are connected via the connection plate 52. There is. Similarly, the lower wall surface 30S of the existing concrete wall 30 and the upper surface of the lower existing beam 24L are connected via a connection plate (not shown).

  Thereby, at the time of an earthquake, stress is transmitted between the existing concrete wall 30 and the upper existing beam 24U and the lower existing beam 24L via the connecting plate 52. Therefore, the joint strength between the existing concrete wall 30 and the upper existing beam 24U and the lower existing beam 24L is increased. That is, the binding force of the existing concrete wall 30 by the upper existing beam 24U and the lower existing beam 24L is increased.

  As a result, since the existing concrete wall 30 can sufficiently exert its proof stress at the time of an earthquake, the proof stress of the existing concrete wall 30 is enhanced. That is, in the present embodiment, the proof stress of the existing concrete wall 30 can be highly evaluated by increasing the joining proof stress of the existing concrete wall 30 and the upper existing beam 24U and the lower existing beam 24L. Therefore, the present embodiment can obtain the same effect as that of the first embodiment.

  Further, in the present embodiment, compared with the case where the existing concrete wall 30 is additionally reinforced, the temporary construction and removal of the formwork are unnecessary. Therefore, the workability is improved.

(Modification)
Next, modified examples of the first and second embodiments will be described.

  In the first and second embodiments, the existing concrete wall 30 is arranged outside the upper existing beam 24U and the lower existing beam 24L, but the first embodiment is not limited to this. For example, as shown in FIG. 5A, the existing concrete wall 30 may be arranged between the upper existing beam 24U and the lower existing beam 24L.

  Specifically, FIG. 5 (A) shows an upper existing beam 24U having an S structure. An existing concrete wall 30 is arranged below the lower flange portion 28 of the upper existing beam 24U. The stud 16 is joined to the lower flange portion 28 of the upper existing beam 24U by welding or the like, and the upper existing beam 24U and the existing concrete wall 30 are joined via the stud 16.

  Here, in the modified example shown in FIG. 5B, the upper existing beam 24U is reinforced by the additional beam portion 60, and then the upper existing beam 24U and the existing concrete wall 30 are connected by the connecting plate 66. . The additional beam section 60 is an example of an existing beam.

  Specifically, the upper existing beam 24U is embedded in the additional beam portion (an additional concrete beam portion) 60. The additional beam portion 60 is made of concrete (post-cast concrete) and has a rectangular cross section. Connection bars 62 for joining the existing slab 12 and the reinforcement beam portion 60 are embedded in the reinforcement beam portion 60. Further, reinforcing bars 64 are appropriately embedded in the increased beam portion 60. The lower surface 60S of the additional beam portion 60 and the upper wall surface 30S of the existing concrete wall 30 are connected by a connecting plate 66.

  The connection plates 66 are provided on both sides of the existing concrete wall 30 and below the reinforced beam portion 60, respectively. Each connecting plate 66 is formed of a steel plate or the like bent in an L shape, and is arranged over the lower surface 60S of the additional beam portion 60 and the wall surface 30S of the upper portion of the existing concrete wall 30.

  One end of the connecting plate 66 is joined with a nut 70 to a post-construction anchor 68 such as a chemical anchor protruding from the lower surface 60S of the additional beam portion 60. The other end of the connecting plate 66 is joined with a nut 74 to a post-construction anchor 72 protruding from the wall surface 30S of the upper portion of the existing concrete wall 30. The connecting plate 66 enhances the joint strength between the upper existing beam 24U and the existing concrete wall 30. Therefore, the proof stress of the existing concrete wall 30 is increased.

  In this way, it is possible to connect the lower surface 60S of the additional beam section 60 that reinforces the upper existing beam 24U and the upper wall surface 30S of the existing concrete wall 30 by the connecting plate 66.

  Next, in the first and second embodiments, the upper existing beam 24U has a steel frame structure, but the first and second embodiments are not limited to this. For example, as shown in FIG. 6 (A), the upper existing beam 80 may be made of reinforced concrete.

  Specifically, the upper existing beam 80 is made of reinforced concrete. The upper existing beam 80 is formed in a rectangular cross section. The width of the upper existing beam 80 is wider than the wall thickness of the existing concrete wall 30, and is joined to the existing concrete wall 30 by a connecting bar (not shown). Upper beam main bars 82 are embedded in the upper corners of the upper existing beam 80. Further, the lower beam main bars 84 are embedded in the lower corners of the upper existing beam 80, respectively. Further, the upper existing beam 80 is embedded with a shear reinforcing bar 86 surrounding the upper beam main bar 82 and the lower beam main bar 84.

  Here, in the modification shown in FIG. 6 (B), the lower surface 80S of the upper existing beam 80 and the wall surface 30S of the upper portion of the existing concrete wall 30 are connected by the additional reinforcement portion 90. Specifically, the additional reinforcement portions 90 are provided on both sides of the upper portion of the existing concrete wall 30 and below the upper existing beam 80, respectively. Each of the additional reinforcement portions 90 is made of concrete and has a rectangular cross section. Further, each additional reinforcement portion 90 is arranged over the lower surface 80S of the upper existing beam 80 and the wall surface 30S of the upper portion of the existing concrete wall 30.

  The additional reinforcement portion 90 is joined to the lower surface 80S of the upper existing beam 80 via the post-construction anchor 92, and is joined to the wall surface 30S of the existing concrete wall 30 via the post-construction anchor 94. By these additional reinforcement portions 90, the lower surface 80S of the upper existing beam 80 and the wall surface 30S of the upper portion of the existing concrete wall 30 are connected. Further, a spiral streak 96 is embedded in each additional reinforcement portion 90.

  The additional reinforcement portion 90 configured in this manner enhances the joint strength between the upper existing beam 80 and the existing concrete wall 30. Therefore, the proof stress of the existing concrete wall 30 is increased. In addition,

  Further, in the first embodiment, the additional reinforcement portion 90 is provided on the upper existing beam 24U and the lower existing beam 24L, but the first embodiment is not limited to this. The additional reinforcement portion can be provided on at least one of the upper existing beam 80 and the lower existing beam 24L. Similarly, the connection plate 52 according to the second embodiment can be provided on at least one of the upper existing beam 80 and the lower existing beam 24L.

  Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be appropriately combined and used, and the gist of the present invention will be described. Needless to say, the present invention can be implemented in various modes without departing from the scope.

20 existing frame 22 existing pillar 24U upper existing beam 24L lower existing beam 28S lower surface (lower surface of upper existing beam)
30 Existing Concrete Wall 30S Wall Surface 40 Seismic Reinforcement Structure 40 Existing Frame 42 Reinforced Reinforcement Part 50 Seismic Reinforcement Structure 52 Connection Plate 60 Reinforced Beam Part (Upper Existing Beam)
60S lower surface (lower surface of upper existing beam)
66 Connection plate 80 Upper existing beam 80S Lower surface (lower surface of upper existing beam)
90 Reinforcement section

Claims (3)

An existing frame having a pair of existing columns and an upper existing beam and a lower existing beam that are erected on the pair of existing columns,
An existing concrete wall provided on the existing frame,
A connecting portion that connects the wall surface of the existing concrete wall and the lower surface of the upper existing beam or the upper surface of the lower existing beam,
Earthquake-proof reinforcement structure with. The connection portion has a reinforced reinforcement portion extending over the wall surface of the existing concrete wall and the lower surface of the upper existing beam or the upper surface of the lower existing beam.
The earthquake-proof reinforcement structure according to claim 1. The connecting portion has a connecting plate extending over the wall surface of the existing concrete wall and the lower surface of the upper existing beam or the upper surface of the lower existing beam.
The earthquake-proof reinforcement structure according to claim 1.