JP2022174456A - Seismic reinforcement structure - Google Patents

Abstract

To improve workability while enhancing the seismic performance of an existing structure having an above-ground structure and an underground structure.SOLUTION: A seismic reinforcement structure includes: an existing structure 10 having an underground structure 10B and an above-ground structure 10A composed of a plurality of floors; an outer reinforcement column 40 provided outside an existing outer peripheral column 20 of the above-ground structure 10A; and an inner reinforcement column 70 provided on the inner side of the existing outer peripheral column 20 and spanning the underground structure 10B and a first floor F1 of the above-ground structure 10A and facing the outer reinforcement column 40 across the existing outer peripheral column 20 on the first floor F1.SELECTED DRAWING: Figure 4

Description

The present invention relates to a seismic reinforcing structure.

There is known a seismic reinforcing structure in which outer reinforcing columns and outer reinforcing beams are provided outside the existing outer peripheral columns and existing outer peripheral beams (see, for example, Patent Documents 1 and 2).

JP 2015-098780 A JP 2010-159543 A

By the way, in an existing structure having an above-ground structure and an underground structure, when installing outside reinforcing columns extending over the above-ground structure and the underground structure outside the existing outer perimeter pillars, it is necessary to excavate the ground outside the underground structure. Therefore, it takes time and effort to construct the outer reinforcing columns.

SUMMARY OF THE INVENTION In view of the above facts, an object of the present invention is to improve the workability of an existing structure having an above-ground structure and an underground structure while enhancing the seismic performance of the existing structure.

The earthquake-resistant reinforcement structure according to claim 1 is an existing structure having an underground structure and an above-ground structure composed of multiple floors, and external reinforcement provided outside the existing perimeter columns of the above-ground structure. a pillar;
an inner reinforcing column provided inside the existing outer peripheral column, extending between the underground structure and the lower floor of the above-ground structure, and facing the outer reinforcing column across the existing outer peripheral column in the lower floor; Prepare.

According to the earthquake-resistant reinforcement structure according to claim 1, the existing structure has an underground structure and an above-ground structure composed of a plurality of floors. Outer reinforcement columns are provided outside the existing perimeter columns of the ground structure. In addition, outer reinforcing beams are provided outside the existing outer peripheral beams of the ground structure. This outer reinforcing beam is joined to the outer reinforcing column. By reinforcing the outer wall surface of the above-ground structure with these outer reinforcing columns and outer reinforcing beams, it is possible to increase the seismic performance of the existing structure while ensuring the opening ratio of the outer wall surface of the above-ground structure.

In addition, an inner reinforcing column is provided inside the existing outer peripheral column on which the outer reinforcing column is provided. The inner reinforcing pillar extends over the lower floors of the underground structure and the aboveground structure, and faces the outer reinforcing pillar across the existing outer peripheral pillar in the lower floors.

Thereby, for example, during an earthquake, the pull-out force acting on the ground structure is transmitted from the outer reinforcing column to the inner reinforcing column via the existing outer peripheral column in the lower story of the ground structure. Pull-out forces transmitted to the inner reinforcing column are transferred from the inner reinforcing column to the underground structure. Therefore, the seismic performance of existing structures is enhanced.

In addition, in the present invention, it is not necessary to excavate the ground outside the underground structure and provide the outer reinforcing pillars outside the existing outer peripheral pillars of the underground structure. Therefore, workability can be improved.

Thus, in the present invention, it is possible to improve the workability while improving the seismic performance of the existing structure.

The earthquake-resistant reinforcement structure according to claim 2 is the earthquake-resistant reinforcement structure according to claim 1, wherein each of the plurality of existing perimeter pillars arranged along one outer wall surface of the ground structure is provided outside. a plurality of the outer reinforcing pillars, and an outer reinforcing beam provided outside the existing outer peripheral beams arranged along the outer wall surface of the ground structure and constructed between the adjacent outer reinforcing pillars, The inner reinforcing columns are provided inside the existing outer peripheral columns positioned at both ends of the one outer wall surface.

According to the seismic reinforcement structure of claim 2, the plurality of outer reinforcing columns are provided outside the plurality of existing outer peripheral columns arranged along one outer wall surface of the ground structure. Also, the outer reinforcing beams are provided outside the existing outer peripheral beams arranged along one outer wall surface of the ground structure, and span the adjacent outer reinforcing columns. By reinforcing one outer wall surface of the ground structure with these outer reinforcing columns and outer reinforcing beams, it is possible to increase the seismic performance of the existing structure while ensuring the opening ratio of the outer wall surface.

Here, at the time of an earthquake, a large pull-out force acts on the existing outer peripheral columns positioned at both ends of one outer wall surface of the ground structure due to overturning moment. As a countermeasure, in the present invention, inner reinforcing columns are provided inside the existing outer peripheral columns positioned at both ends of one outer wall surface of the ground structure. The inner reinforcing columns span the lower floors of the aboveground structure and the underground structure.

As a result, during an earthquake, the pull-out force acting on the existing peripheral columns located at both ends of one outer wall surface is transmitted to the existing peripheral columns of the underground structure via the inner reinforcing columns. Therefore, the seismic performance of existing structures can be efficiently improved.

Claim 3 is a seismic reinforcement structure according to Claim 1 or Claim 2, wherein the lower floor of the ground structure is sandwiched between the inner reinforcement column and the outer reinforcement column. The outer peripheral wall connected to the portion of the existing outer peripheral column that is located is a seismic wall.

According to the quake-resistant reinforcement structure according to claim 3, on the lower floor of the ground structure, the outer peripheral wall connected to the portion of the existing outer pillar sandwiched between the inner reinforcing pillar and the outer reinforcing pillar is an earthquake-resistant wall. ing. In other words, earthquake-resistant walls are provided on the lower floors of the ground structure.

Here, the existing outer perimeter columns on the lower floors of the ground structure serve as a transmission path for transmitting the pull-out force generated by the overturning moment during an earthquake to the inner reinforcement columns. Therefore, if the existing perimeter columns on the lower floors of the ground structure bear the seismic force (horizontal force), for example, the required cross-sectional area of the outer reinforcement columns that reinforce the existing perimeter columns will be reduced to that of the upper floors of the ground structure. It may be larger than the required cross-sectional area of the outer reinforcing column.

As a countermeasure against this, in the present invention, as described above, earthquake-resistant walls are provided on the lower floors of the ground structure. This seismic wall bears the seismic force acting on the lower floors of the ground structure, thereby reducing the seismic force borne by the existing peripheral columns of the lower floors.

As a result, for example, without increasing the required cross-sectional area of the outer reinforcing column that reinforces the existing outer peripheral column on the lower floor of the ground structure, the pull-out force can be transmitted from the existing outer peripheral column to the inner reinforcing column during an earthquake. .

As described above, according to the present invention, in an existing structure having an aboveground structure and an underground structure, it is possible to improve the workability while improving the seismic performance of the existing structure.

1 is an elevational view showing one outer wall surface of an existing structure to which a seismic reinforcement structure according to this embodiment is applied; FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1; FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 1; FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 1; FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 1; FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 1; FIG. FIG. 7 is a cross-sectional view taken along line 7-7 of FIG. 1;

Hereinafter, an earthquake-resistant reinforcing structure according to one embodiment will be described with reference to the drawings.

(existing structure)
FIG. 1 shows one outer wall surface 10W of an existing structure 10 to which the earthquake-resistant reinforcement structure according to this embodiment is applied. The existing structure 10 includes an existing foundation 12 , a plurality of existing perimeter pillars 20 and a plurality of existing perimeter beams 30 .

Note that the arrow X shown in each figure indicates the width direction of one outer wall surface 10W of the plurality of outer wall surfaces of the existing structure 10 . An arrow Y indicates a direction (depth direction) orthogonal to one outer wall surface 10W of the existing structure 10 . Furthermore, an arrow Z indicates the height direction (vertical direction) of the existing structure 10 .

The existing foundation 12 is a foundation bottom slab (direct foundation) laid on the excavated bottom of the ground G. A plurality of existing perimeter pillars 20 are erected on the existing foundation 12 . The plurality of existing outer peripheral columns 20 are arranged along the outer wall surface 10W of the existing structure 10 and are arranged at intervals in the width direction of the outer wall surface 10W.

Note that the existing foundation 12 is not limited to a direct foundation, and may be a pile foundation or the like.

As shown in FIG. 2, the existing perimeter pillar 20 is made of steel-reinforced concrete. An internal steel frame 22 , a plurality of column main reinforcing bars 24 , and a plurality of shear reinforcing bars 26 are embedded inside the existing outer peripheral column 20 . The internal steel frame 22 is, for example, cross H-shaped steel. In addition, the existing outer peripheral column 20 is not limited to the steel frame reinforced concrete structure, and may be a reinforced concrete structure.

As shown in FIG. 1 , a plurality of existing peripheral beams 30 are installed between adjacent existing peripheral columns 20 . A plurality of existing peripheral beams 30 are arranged along the outer wall surface 10W. A plurality of existing peripheral beams 30 are installed on adjacent existing peripheral pillars 20 in a vertically spaced manner so as to correspond to each floor of the existing structure 10 . A frame (frame frame) 14 is configured by these existing peripheral beams 30 and existing peripheral columns 20 . The frame 14 has an opening 16 inside it.

As shown in FIG. 3, the existing perimeter beam 30 is made of steel-reinforced concrete. An internal steel frame 32 , a plurality of beam main reinforcing bars 34 , and a plurality of shear reinforcing bars 36 are embedded inside the existing outer peripheral beam 30 . The internal steel frame 32 is, for example, H-shaped steel. In addition, the existing outer peripheral beam 30 is not limited to the steel frame reinforced concrete structure, and may be a reinforced concrete structure.

As shown in FIG. 1, the existing structure 10 has an underground structure 10B and an aboveground structure 10A. The underground structure 10B is a part of the existing structure 10 that is located underground. This underground structure 10B is composed of a plurality of floors.

As shown in FIG. 4, the underground structure 10B has the existing foundation 12 and the existing underground outer wall 18 described above. The existing underground outer wall 18 is provided along the outer wall surface 10W of the existing structure 10 . This existing underground outer wall 18 bears earth pressure as a retaining wall.

Note that the underground structure 10B is not limited to a plurality of floors, and can be constructed with at least one floor.

The ground structure 10A is a part of the existing structure 10 that is placed on the ground. This ground structure 10A is composed of a plurality of floors. An outer wall surface 10W of the ground structure 10A is reinforced by an outer shell reinforcing frame.

(outer shell reinforcement frame)
As shown in FIG. 1 , the outer shell reinforcing frame has a plurality of outer reinforcing columns 40 and a plurality of outer reinforcing beams 50 that span adjacent outer reinforcing columns 40 . The plurality of outer reinforcing columns 40 are provided outside the existing outer peripheral columns 20 on the outer wall surface 10W of the ground structure 10A.

(outside reinforcing column)
Each outer reinforcing column 40 is provided from the first floor F1 to the top floor of the ground structure 10A. Further, as shown in FIG. 4, the column base portion 40L of each outer reinforcing column 40 is not buried in the ground G, and the column base portion 20L of the existing outer peripheral column 20 on the first floor F1 of the ground structure 10A is placed outside.

As shown in FIG. 2, the outer reinforcing column 40 is made of steel-reinforced concrete. An internal steel frame 42 , a plurality of column main bars 44 , and a plurality of shear reinforcing bars 46 are embedded inside the outer reinforcing column 40 . The internal steel frame 32 is, for example, H-shaped steel.

The outer reinforcing posts 40 are arranged along the existing outer peripheral posts 20 . Moreover, the lateral width (the width in the direction of the arrow X) of the outer reinforcing column 40 is made wider than the lateral width of the existing outer peripheral column 20 . The outer reinforcing column 40 is joined to the outer surface of the existing outer peripheral column 20 via a plurality of post-installed anchors 48 . Of the plurality of post-installed anchors 48 , some of the post-installed anchors 48 are welded to the flange of the internal steel frame 22 of the existing outer perimeter column 20 . The existing outer peripheral columns 20 are reinforced by the outer reinforcing columns 40 .

The lateral width of the outer reinforcing pillar 40 can be changed as appropriate, and may be the same as the lateral width of the existing peripheral pillar 20 or narrower than the lateral width of the existing peripheral pillar 20 . Also, the joint structure between the outer reinforcing column 40 and the existing outer peripheral column 20 is not limited to the post-installed anchor 48, and can be changed as appropriate. Furthermore, the outer reinforcing column 40 is not limited to the steel-framed reinforced concrete structure, and may be a reinforced concrete structure or a steel frame structure.

As shown in FIG. 3, the outer reinforcing beams 50 are made of steel-reinforced concrete. An internal steel frame 52 , a plurality of beam main bars 54 , and a plurality of shear reinforcing bars 56 are embedded inside the outer reinforcing beam 50 . The internal steel frame 32 is, for example, H-shaped steel.

(outside reinforcement beam)
The outer reinforcing beams 50 are arranged along the existing outer perimeter columns 20 . Further, the beam length and beam width of the outer reinforcing beams 50 are wider than those of the existing outer peripheral beams 30 . This outer reinforcing beam 50 is joined to the outer surface of the existing outer peripheral beam 30 via a plurality of post-installed anchors 58 and additional concrete 60 . The existing outer peripheral beams 30 are reinforced by the outer reinforcing beams 50 .

The beam length and beam width of the outer reinforcing beams 50 can be changed as appropriate, and may be the same as those of the existing peripheral beams 30, or shorter than those of the existing peripheral beams 30. Also good. Also, the joint structure between the outer reinforcing beams 50 and the existing outer peripheral beams 30 is not limited to the post-installed anchors 58 and the additional concrete 60, and can be changed as appropriate. Further, the additional concrete 60 can be omitted as appropriate. Furthermore, the outer reinforcing beam 50 is not limited to the steel-framed reinforced concrete structure, and may be a reinforced concrete structure or a steel frame structure.

(inner reinforcement beam)
Here, as shown in FIG. 1, at the time of an earthquake, the overturning moment M causes the existing outer perimeter columns 20 (hereinafter referred to as "existing perimeter pillars 20") located at both ends in the width direction of the outer wall surface 10W of the existing structure 10, that is, at the corners of the existing structure 10. , “existing corner post 20C”), a large pull-out force P acts.

As a countermeasure against this, in this embodiment, inner reinforcing columns 70 are provided. The inner reinforcing column 70 extends over the first floor F1 of the ground structure 10A and the first basement floor B1 of the underground structure 10B. As a result, during an earthquake, the pull-out force P acting on the existing corner post 20C is transmitted to the underground structure 10B via the inner reinforcing post 70. As shown in FIG.

Note that the first floor F1 of the ground structure 10A is an example of a lower floor of the ground structure 10A.

As shown in FIG. 4, the inner reinforcing post 70 is provided along the inner surface of the existing corner post 20C. The column head 70U of this inner reinforcing column 70 is positioned inside the column head 20U of the existing corner pillar 20C on the first floor F1 of the ground structure 10A. On the other hand, the column base portion 70L of the inner reinforcing column 70 is arranged inside the column base portion 20L of the existing corner pillar 20C on the first basement floor B1 of the underground structure 10B.

The inner reinforcing pillar 70 faces the outer reinforcing pillar 40 across the existing corner pillar 20C on the first floor F1 of the ground structure 10A. In other words, on the first floor F1 of the ground structure 10A, the existing corner post 20C is sandwiched between the outer reinforcing column 40 and the inner reinforcing column 70 from both sides in the out-of-plane direction (arrow Y direction) of the outer wall surface 10W.

As shown in FIG. 5, the inner reinforcing column 70 is made of reinforced concrete. A plurality of column main reinforcing bars 74 and a plurality of shear reinforcing bars 76 are embedded inside the inner reinforcing column 70 .

The lateral width (the width in the direction of the arrow X) of the inner reinforcing post 70 is substantially the same as the lateral width of the existing corner post 20C. Moreover, the vertical width (the width in the arrow Y direction) of the inner reinforcing post 70 is made wider than the vertical width of the existing corner post 20C. This inner reinforcing column 70 is joined to the inner surface of the existing corner column 20C via a plurality of post-construction anchors 78 on the first floor F1 of the ground structure 10A. Of the plurality of post-installed anchors 78, some post-installed anchors 78 are welded to the flange of the internal steel frame 22 of the existing corner post 20C.

Similarly, as shown in FIG. 6, the inner reinforcing pillars 70 are installed on the first basement floor B1 (see FIG. 1) of the underground structure 10B via a plurality of post-installed anchors 78 to the existing corner pillars 20C. Bonded to the inner surface. Of the plurality of post-installed anchors 78, some post-installed anchors 78 are welded to the flange of the internal steel frame 22 of the existing corner post 20C.

A plurality of post-installed anchors 78 are spaced apart in the axial direction of the inner reinforcing post 70 . A plurality of post-installed anchors 78 are provided over the entire length of the inner reinforcing column 70 in the axial direction. The inner reinforcing pillars 70 reinforce the existing corner pillars 20C of the first floor F1 of the ground structure 10A and the first basement floor B1 of the underground structure 10B.

As shown in FIG. 4, the inner reinforcing column 70 extends from the first floor F1 of the ground structure 10A through the slab 94 of the first floor F1 to the first basement floor B1 of the underground structure 10B. An end portion 90E of an existing outer perimeter orthogonal beam 90 that supports a slab 94 of the first floor F1 of the ground structure 10A is embedded in the inner reinforcing column 70. As shown in FIG. The existing perimeter perpendicular beam 90 is an existing perimeter beam orthogonal to the existing perimeter beam 30 .

As shown in FIG. 7, the existing outer perimeter orthogonal beam 90 is made of steel-reinforced concrete. An internal steel frame 92 and a plurality of beam main reinforcing bars and shear reinforcing bars (not shown) are embedded inside the existing outer peripheral orthogonal beams 90 .

The lateral width of the inner reinforcing column 70 is wider than the beam width of the existing outer perimeter perpendicular beam 90 . The column main reinforcements 74 of the inner reinforcing columns 70 are arranged on both sides of the existing outer peripheral perpendicular beams 90 in the beam width direction. Further, the existing outer peripheral orthogonal beam 90 and the inner reinforcing column 70 are connected by a hooked bar 80 as a shear reinforcing bar surrounding the column main bar 74 .

(earthquake-resistant wall)
As shown in FIG. 1, seismic walls 100 are provided on the frames 14 on both end sides of the outer wall surface 10W on the first floor F1 of the ground structure 10A. The earthquake-resistant wall 100 is made of, for example, reinforced concrete. This seismic wall 100 is connected to the existing corner pillars 20C, the existing peripheral pillars 20, and the existing upper and lower peripheral beams 30 that constitute the frame 14. As shown in FIG. This seismic wall 100 is connected to the portion of the existing corner post 20C sandwiched between the outer reinforcing column 40 and the inner reinforcing column 70. As shown in FIG.

The seismic wall 100 mainly bears the seismic force (horizontal force) in the width direction (arrow X direction) of the outer wall surface 10W of the existing structure 10 . This seismic wall 100 reduces the seismic force borne by the existing corner post 20C of the first floor F1 of the ground structure 10A.

The earthquake-resistant wall 100 is not limited to a reinforced concrete construction, and may be a steel earthquake-resistant wall or the like.

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

As shown in FIG. 1, according to the earthquake-resistant reinforcement structure according to this embodiment, the existing structure 10 has an underground structure 10B and an above-ground structure 10A composed of multiple floors. One outer wall surface 10W of the ground structure 10A is reinforced by an outer shell reinforcing frame.

Specifically, the outer shell reinforcing frame has a plurality of outer reinforcing columns 40 and a plurality of outer reinforcing beams 50 . The plurality of outer reinforcing columns 40 are provided outside the plurality of existing outer peripheral columns 20 arranged along one outer wall surface 10W of the ground structure 10A.

Also, the outer reinforcing beams 50 are provided outside the plurality of existing outer peripheral beams 30 arranged along one outer wall surface 10W of the ground structure 10A, and span the adjacent outer reinforcing columns 40 . By reinforcing the outer wall surface 10W of the ground structure 10A with these outer reinforcing columns 40 and outer reinforcing beams 50, the seismic performance of the existing structure 10 is enhanced while ensuring the opening ratio of the openings 16 of the outer wall surface 10W. be able to.

Here, as described above, during an earthquake, the overturning moment M acts on the existing corner posts 20C located at both ends of the outer wall surface 10W of the ground structure 10A with a large pull-out force P.

As a countermeasure, for example, it is conceivable to excavate the ground G outside the existing corner post 20C in the underground structure 10B and provide the outer reinforcing post 40 outside the existing corner post 20C. However, in this case, excavation of the ground G is troublesome.

On the other hand, in this embodiment, as shown in FIG. 4, an inner reinforcing post 70 is provided inside the existing corner post 20C. The inner reinforcing column 70 spans the first floor F1 of the ground structure 10A and the first basement floor B1 of the underground structure 10B, and faces the outer reinforcing column 40 across the existing outer peripheral column 20 on the first floor F1. there is

As a result, for example, during an earthquake, the pull-out force P acting on the ground structure 10A is transmitted from the outer reinforcing column 40 to the inner reinforcing column 70 via the existing corner pillar 20C on the first floor F1 of the ground structure 10A. . The pulling force P transmitted to the inner reinforcing column 70 is transmitted from the inner reinforcing column 70 to the existing foundation 12 via the existing corner post 20C and the existing underground outer wall 18 of the underground structure 10B.

Therefore, in this embodiment, the ground G outside the underground structure 10B is excavated, and the earthquake resistance performance of the existing structure 10 can be improved without providing the outer reinforcement pillars 40 outside the existing corner posts 20C. Therefore, workability can be improved.

In addition, since the existing underground outer wall 18 also functions as a retaining wall, it has high bearing strength. Therefore, the pull-out force P is transmitted to the existing foundation 12 through the existing corner post 20C and the existing underground outer wall 18 even if the inner reinforcing column 70 is not provided below the second basement floor of the underground structure 10B.

As described above, in this embodiment, it is possible to improve the workability while improving the seismic performance of the existing structure 10 .

A seismic wall 100 is provided on the outer wall surface 10W of the first floor F1 of the ground structure 10A. The earthquake-resistant walls 100 are provided, for example, on the frames 14 on both end sides of the outer wall surface 10W, and are connected to the existing corner pillars 20C of the first floor F1.

Here, the existing corner post 20C of the first floor F1 of the ground structure 10A serves as a transmission path for transmitting the pull-out force P generated by the overturning moment M during an earthquake to the inner reinforcing column 70. As shown in FIG. Therefore, if the existing corner post 20C of the first floor F1 of the ground structure 10A bears the seismic force (horizontal force in the direction of the arrow X), for example, the required cross-sectional area of the outer reinforcing post 40 that reinforces the existing corner post 20C may be larger than the required cross-sectional area of the outer reinforcement column 40 on the upper floor of the ground structure 10A.

As a countermeasure, in this embodiment, as described above, the earthquake-resistant wall 100 is provided on the first floor F1 of the ground structure 10A. By bearing the seismic force (horizontal force in the direction of the arrow X) acting on the first floor F1 of the ground structure 10A by the earthquake-resistant wall 100, the seismic force borne by the existing corner pillar 20C of the first floor F1 is reduced. be.

As a result, for example, without increasing the required cross-sectional area of the outer reinforcing column 40 of the first floor F1 of the ground structure 10A, the pull-out force P can be transmitted from the existing corner post 20C to the inner reinforcing column 70 during an earthquake. .

(Modification)
Next, a modification of the above embodiment will be described.

In the above-described embodiment, earthquake-resistant walls 100 are provided on the frames 14 on both end sides of the outer wall surface 10W of the first floor F1 (lower floor) of the ground structure 10A. However, the number and arrangement of earthquake-resistant walls 100 can be changed as appropriate. Therefore, for example, earthquake-resistant walls 100 may be provided on all the frames 14 on the outer wall surface 10W of the first floor F1, or the earthquake-resistant wall 100 may be provided only on the central frame 14 on the outer wall surface 10W of the first floor F1. good. Moreover, it is also possible to provide the earthquake-resistant wall 100 in the frame 14 in the outer wall surface 10W of the second floor or higher of the ground structure 10A. Furthermore, the seismic wall 100 may be provided as required, and can be omitted as appropriate.

Further, in the above-described embodiment, the inner reinforcing column 70 is provided over the first floor F1 of the aboveground structure 10A and the first basement floor B1 of the underground structure 10B. However, the inner reinforcing column 70 may be provided, for example, over the lower floors of the ground structure 10A and the second basement floor and below of the underground structure 10B.

Note that the lower floors of the ground structure 10A referred to here are, for example, the floors of ⅓ or less of the ground structure 10A. In this case, the seismic wall 100 can be appropriately provided on the frame 14 of the one outer wall surface 10W on the lower floor of the ground structure 10A provided with the inner reinforcing column 70 .

Further, in the above-described embodiment, the inner reinforcing pillars 70 are provided inside the existing corner pillars 20C on the outer wall surface 10W of the ground structure 10A. However, the number and arrangement of the inner reinforcing pillars 70 can be changed as appropriate. Also good. Also, the existing structure 10 may be provided with at least one inner reinforcing post 70 .

Further, in the above-described embodiment, a plurality of outer reinforcing beams 50 are provided on one outer wall surface 10W of the ground structure 10A. However, the number and arrangement of the outer reinforcing beams 50 can be changed as appropriate. Also, the outer reinforcing beams 50 may be provided as required, and can be omitted as appropriate.

Further, in the above-described embodiment, a plurality of outer reinforcing columns 40 are provided on one outer wall surface 10W of the ground structure 10A. However, the number and arrangement of the outer reinforcing columns 40 may be changed as appropriate. At least one outer reinforcing column 40 can be provided on one outer wall surface 10W of the ground structure 10A.

Further, the earthquake-resistant reinforcement structure according to the above embodiment is applied to one outer wall surface 10W of the ground structure 10A. However, the earthquake-resistant reinforcement structure according to the above-described embodiment can be applied to at least one outer wall surface among the plurality of outer wall surfaces of the ground structure 10A.

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 used in combination as appropriate. It goes without saying that various aspects can be implemented without departing from the scope.

10 Existing structure 10A Aboveground structure 10B Underground structure 10W Outer wall surface (one outer wall surface of aboveground structure)
20 Existing Perimeter Pillars 20C Existing Corner Pillars (Existing Perimeter Pillars Located at Both Ends of One Outer Wall of Ground Structure)
30 Existing Perimeter Beam 40 Outside Reinforcement Column 50 Outside Reinforcement Beam 70 Inside Reinforcement Column 100 Seismic Wall F1 1st Floor (Lower Floor of Ground Structure)

Claims (3)

an existing structure having an underground structure and an above-ground structure composed of multiple floors;
an outer reinforcing pillar provided outside the existing outer perimeter pillar of the ground structure;
an inner reinforcing column provided inside the existing outer peripheral column, extending between the underground structure and the lower floor of the above-ground structure, and facing the outer reinforcing column across the existing outer peripheral column in the lower floor;
Seismic reinforcement structure with a plurality of outer reinforcing pillars respectively provided outside the plurality of existing outer peripheral pillars arranged along one outer wall surface of the ground structure;
an outer reinforcing beam provided on the outer side of the existing outer peripheral beams arranged along the outer wall surface of the above-ground structure and bridged between the adjacent outer reinforcing columns;
with
The inner reinforcing columns are provided inside the existing outer peripheral columns located at both ends of the one outer wall surface,
The seismic reinforcement structure according to claim 1. In the lower floor of the ground structure, the outer peripheral wall connected to the portion of the existing outer peripheral column sandwiched between the inner reinforcing column and the outer reinforcing column is a seismic wall.
The seismic reinforcement structure according to claim 1 or 2.

Images