JP2020114977A - Reinforcing structure of building - Google Patents

Abstract

To provide a reinforcing structure of a building capable of securing rigidity of a building unit against horizontal load and vertical load acting on the building unit.SOLUTION: A building unit 14 includes a center pillar 68 and support parts 54. A center pillar 68 is disposed in the vicinity of a column 36 on the other side in one direction of a skeleton 30 when viewed from a building height direction, and connects a ceiling girder 26 of a skeleton 18 and a floor girder 28 of the skeleton 18 disposed facing the ceiling girder 26 in the building height direction. On the other hand, one of the support parts 54 is disposed in the vicinity of the center pillar 68 when viewed from the building height direction, and is interposed between the floor girder 28 of the skeleton 18 and a column form part 42B constituting a part of a foundation 12. Therefore, a vertical load acting on the ceiling girder 26 of the skeleton 18 is transmitted to the floor girder 28 of the skeleton 18 via the center column 68, and is transmitted to the foundation 12 via the floor girder 28 and the support parts 54 to be supported by the foundation 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to a reinforcing structure for a building.

Patent Document 1 below discloses an invention relating to a fixed structure of a building unit. In this fixed structure of a building unit, a floor girder is fixed to a rising portion of a foundation via a fixing portion including anchor bolts and spacers. Therefore, the horizontal load acting on the building unit can be supported by the fixing portion, and as a result, the rigidity of the building unit against the horizontal load can be secured.

JP, 2017-71902, A

However, in the prior art described in Patent Document 1, the fixed portion only supports the portion of the building unit on the lower side of the building, and against a vertical load such as its own weight acting on the portion of the building unit on the upper side of the building. There is room for improvement in terms of ensuring the rigidity of the building unit.

In consideration of the above facts, an object of the present invention is to obtain a building reinforcing structure capable of ensuring the rigidity of a building unit against horizontal load and vertical load acting on the building unit.

The building reinforcing structure according to the first aspect includes a first skeleton, a lower-floor-side building unit that is arranged with one direction as a longitudinal direction and constitutes a lower floor side of the building, and a second skeleton, The pillar on one side of the one direction of the second body is placed on the upper surface of the lower floor side building unit so as to overlap the pillar on the one side of the first body when viewed from the building height direction, and An upper floor building that constitutes the upper floor side of the building and is a setback unit in which the side surface on the other side of the one direction is offset to the one side of the other side surface of the lower floor building unit. A unit and a foundation for supporting the lower-floor-side building unit, the ceiling girder of the first skeleton, and the floor of the first skeleton arranged to face the ceiling girder in the building height direction. The girder is an intermediate pillar arranged near the pillar on the other side of the one direction of the second skeleton when viewed from the building height direction, and is connected in the building height direction with the floor girder and one of the foundations. The exposed part that constitutes a part and is located on the lower side of the building of the floor girder and exposed to the ground means that the part is located near the center pillar when viewed from the building height direction, and the floor girder and the exposed part. Pins are joined by a supporting portion interposed between the building and the building with the building height direction as the axial direction.

In the reinforcing structure for a building according to the first aspect, the lower-floor-side building unit including the first skeleton is arranged with one direction as the longitudinal direction to configure the lower floor side of the building. The upper floor building unit is placed on the upper surface of the lower floor building unit, and the upper floor building unit constitutes the upper floor side of the building. And the lower-floor building unit is supported by the foundation.

In addition, the upper-floor building unit includes a second skeleton, and the pillar on one side of the second skeleton in one direction is the pillar on the one side of the first skeleton when viewed from the building height direction. It is arranged to overlap. Therefore, on one side in one direction of the upper-floor building unit, the vertical load such as the self-weight of the upper-floor building unit transmitted from the pillar on one side in one direction of the second skeleton is applied in one direction in the first skeleton. It can be supported by side pillars.

By the way, the upper-floor building unit is a setback unit in which the side surface on the other side in one direction is offset to the one side in the one direction with respect to the side surface on the other side of the lower-floor building unit. Therefore, the vertical load such as the self-weight of the upper-floor building unit transmitted from the pillar on the other side in one direction of the second structure is supported by the ceiling girder of the first structure, and the load is applied to the ceiling girder. Can be concentrated. As a result, the rigidity of the lower floor building unit against vertical load may be insufficient.

Further, since the lower-floor building unit is affected by a horizontal load due to an earthquake or the like, it is preferable that the rigidity with respect to the horizontal load can be secured.

Here, in this aspect, the center pillar and the support portion are provided. The middle pillar is arranged near the pillar on the other side of the second structure in one direction when viewed from the building height direction, and the ceiling girder of the first structure and the ceiling girder in the building height direction. The floor girders of the first skeleton, which are arranged to face each other, are connected in the building height direction.

On the other hand, the supporting portion is arranged near the center pillar when viewed from the height direction of the building, and also constitutes the floor girder of the first frame and a part of the foundation, and is arranged on the lower side of the floor girder of the building. It also intervenes between the exposed part exposed on the ground. For this reason, in this aspect, the vertical load acting on the ceiling girder of the first frame is transmitted to the floor girder of the first frame via the center column, and is also applied to the foundation via the floor girder and the support portion. Transmitted and supported by the foundation. As a result, the rigidity of the lower-floor building unit against a vertical load can be secured.

Moreover, in this aspect, the floor girder of the first skeleton is pin-bonded to the exposed portion of the foundation by the support portion with the building height direction as the axial direction. Therefore, the load acting on the lower-floor building unit can be supported by the support portion without generating a bending moment due to the load on the floor girder of the first skeleton. As a result, the rigidity of the lower-floor building unit against horizontal load can be secured.

A reinforcing structure for a building according to a second aspect is the reinforcing structure for a building according to the first aspect, wherein the foundation constitutes a part of an outer peripheral foundation or a first rising portion continuous with the outer peripheral foundation, and 1. A second rising portion that is provided in parallel with the rising portion and constitutes a part of the outer peripheral foundation or is continuous with the outer peripheral foundation, and a connecting beam that connects the first rising portion and the second rising portion. The exposed portion is a pillar-shaped portion provided on the connecting beam.

In the building reinforcing structure according to the second aspect, the foundation includes a first rising portion, a second rising portion provided in parallel with the first rising portion, the first rising portion, and the second rising portion. It is equipped with a connecting beam that connects the two. The first rising portion and the second rising portion respectively constitute a part of the outer peripheral foundation or are continuous with the outer peripheral foundation, and the supporting portion is supported by the pillar-shaped portion provided on the connecting beam. Therefore, the load transmitted from the supporting portion to the pillar-shaped portion is dispersed to the outer peripheral foundation side via the connecting beam.

A reinforcing structure for a building according to a third aspect is the reinforcing structure for a building according to the first aspect or the second aspect, wherein the central pillar has a hollow rectangular cross-sectional shape viewed from the building height direction. It has a closed cross-section structure.

In the reinforcing structure for a building according to the third aspect, the central pillar has a closed cross-section structure in which the sectional shape viewed from the building height direction is a hollow rectangular shape, and a strong axis and a weak axis occur in the central pillar. Can be suppressed.

A reinforcing structure for a building according to a fourth aspect is the reinforcing structure for a building according to any one of the first aspect through the third aspect, wherein the center pillar is for each of the ceiling girder and the floor girder. Are pin-joined.

In the reinforcing structure for a building according to the fourth aspect, the middle pillar is pin-joined to each of the ceiling girder and floor girder of the first frame, and a load is applied from the ceiling girder and the floor girder to the center pillar. It is possible to suppress the generation of a bending moment in the center column by being transmitted.

As described above, the building reinforcing structure according to the first aspect has an excellent effect that the rigidity of the building unit against the horizontal load and the vertical load acting on the building unit can be secured.

The building reinforcing structure according to the second aspect has an excellent effect that the load acting on the building unit can be supported in a stable state.

The building reinforcing structure according to the third aspect has an excellent effect that loads in various directions acting on the central pillar of the building unit can be stably supported.

The building reinforcing structure according to the fourth aspect has an excellent effect that bending deformation of the center pillar of the building unit can be suppressed.

It is sectional drawing (sectional view which shows the state cut|disconnected along the 1-1 line of FIG. 7) which shows the structure of the principal part in the building unit to which the building reinforcement structure which concerns on this embodiment was applied. It is a side view (two-direction arrow view of Drawing 1) showing composition of a middle pillar in a building unit to which a building reinforcement structure concerning this embodiment was applied. FIG. 3 is a plan sectional view (a sectional view showing a state cut along line 3-3 in FIG. 1) showing a peripheral structure of a support portion in a building unit to which a building reinforcing structure according to the present embodiment is applied. It is an exploded perspective view showing composition of a reinforcement structure of a building concerning this embodiment. It is a side view (5 direction arrow view of Drawing 3) showing the composition of the foundation of the building to which the building reinforcement structure concerning this embodiment was applied. It is a top view which shows the relationship between the building unit to which the reinforcement structure of the building which concerns on this embodiment was applied, and a foundation. It is a side view which shows typically the structure of the building to which the building reinforcement structure which concerns on this embodiment was applied.

Hereinafter, the reinforcing structure for a building according to the embodiment of the present invention will be described with reference to FIGS. 1 to 7. First, the overall structure of the “building 10” to which the building reinforcing structure according to the present embodiment is applied will be described mainly using FIG. 7.

The building 10 includes a "foundation 12", a "building unit 14" as a lower-floor-side building unit that is arranged on the upper side of the building of the foundation 12 and constitutes the lower floor side of the building 10, and above the building unit 14 above the building. "Building unit 16" as an upper-floor-side building unit that is arranged on the side and constitutes the upper floor side of the building 10. Since the building unit 14 and the building unit 16 have basically the same structure, the structure of the building unit 14 will be mainly described below.

The building unit 14 is arranged with one direction as a longitudinal direction, and has a "frame 18" as a first frame, an outer wall panel forming a part of an outer wall (not shown) of the building 10, and an inner wall (not shown) of the building 10. And an inner wall panel forming a part of the.

As shown in FIG. 1, the frame 18 connects the ceiling frame 20, the floor frame 22 arranged so as to overlap with the ceiling frame 20 when viewed from the building height direction, and the ceiling frame 20 and the floor frame 22. It is configured to include four "pillars 24".

More specifically, the ceiling frame 20 includes two types of long and short ceiling girders, each of which is made of channel steel and arranged in a rectangular frame shape, and a plurality of ceilings (not shown) spanned between the longer ceiling girders 26. It is configured to include a beam.

The floor frame 22 includes two types of long and short floor girders, each of which is made of channel steel and arranged in a rectangular frame shape, and a plurality of floor girders (not shown) bridged between the longer floor girders 28. It is configured to include.

The pillar 24 has a closed cross section viewed from the building height direction and connects the corners of the ceiling frame 20 and the floor frame 22 in the building height direction.

On the other hand, the building unit 16 includes a “skeleton 30” as a second skeleton, an outer wall panel forming a part of an outer wall of the building 10 not shown, and an inner wall panel forming a part of an inner wall of the building 10 not shown. Equipped with.

Like the frame 18, the frame 30 includes a ceiling frame 32, a floor frame 34 arranged so as to overlap the ceiling frame 32 when viewed from the building height direction, and four frames connecting the ceiling frame 32 and the floor frame 34. It is configured to include a "pillar 36".

In addition, the building unit 16 is arranged with one direction as a longitudinal direction, and the pillar 36 on one side in one direction when viewed from the building height direction is overlapped with the pillar 24 on one side in one direction in the building unit 14. It is mounted on the upper surface of 14.

Further, the length L1 in one direction of the building unit 16 is set to be shorter than the length L2 in one direction of the building unit 14, and the “side surface 16A” on the other side of the building unit 16 in one direction is The building unit 14 is offset to one side in one direction with respect to the "side surface 14A" on the other side in one direction. That is, the building unit 16 is a setback unit.

On the other hand, the foundation 12 is made of reinforced concrete, and as shown in FIG. 6, an inner foundation 38 formed in a lattice shape when viewed from the building height direction and an inner foundation 38 viewed from the building height direction. It is provided with a "peripheral foundation 40" that is formed in a frame shape so as to surround it, and a "connecting beam 42" that connects the inner foundation 38 and the outer peripheral foundation 40.

Specifically, the inner foundation 38 includes a footing portion 38A embedded in the ground 44 (see FIG. 5), and a “rising portion 38B” vertically raised from the widthwise central portion of the footing portion 38A. The cross-sectional shape when viewed from the extending direction is formed in an inverted T shape.

The outer peripheral foundation 40 is also basically configured similarly to the inner foundation 38, and is configured to include a footing portion 40A and a "rising portion 40B".

More specifically, the inner foundation 38 includes a middle-passage foundation 38C that connects portions of the outer periphery foundation 40 that extend in one direction and extends in a direction orthogonal to the one direction when viewed from the building height direction. In the present embodiment, as an example, the rising portion 38C1 of the Nakadori foundation 38C and the portion of the rising portion 40B of the outer peripheral foundation 40 that extends parallel to the rising portion 38C1 when viewed from the building height direction are connected by the connecting beam 42. It is connected.

The connecting beam 42 is configured to include a main portion 42A that constitutes a main portion thereof and has a rectangular plate shape in a side view, and a "pillar-shaped portion 42B" as an exposed portion. Then, the main body portion 42A is integrated with a part of the rising portion 38C1 of the foundation 38C and the rising portion 40B of the outer peripheral foundation 40, and is in a state of being bridged between them.

As shown in FIG. 5, the pillar-shaped portion 42B is a quadrangular prism protruding from the upper surface of the main body portion 42A to the upper side of the building, and at least the portion on the upper side of the building is exposed from the ground 44. Has become.

More specifically, a main reinforcement 46 and a hoop reinforcement 48 are arranged inside the columnar portion 42B, and the main reinforcement 46 extends orthogonally to the main reinforcement 50 extending in the longitudinal direction of the main body 42A and extends to the upper side of the building. The hoop streak 48 has a ring shape surrounding the main streak 46 when viewed from the building height direction, and a plurality of hoop streaks 48 are arranged in the building height direction.

In addition, a cylindrical bottomed hole anchor 52 is embedded in the columnar portion 42B in a state where the building height direction is the longitudinal direction, and the hole anchor 52 is the above-described main bar 46 and hoop bar 48. It is surrounded by.

Here, in the present embodiment, as shown in FIG. 1, the floor girder 28 arranged on the connecting beam 42 and the pillar-shaped portion 42B are connected via the "support portion 54". There is a feature of. Further, the floor girder 28 arranged on the connecting beam 42 and the ceiling girder 26 arranged opposite to the floor girder 28 in the building height direction are connected in the building height direction by the "middle pillar 68". The second characteristic is that Hereinafter, the configurations of the support portion 54 and the center pillar 68, which form the main portion of the present embodiment, will be described in detail.

As shown in FIGS. 3 and 4, the support portion 54 includes the hole anchor 52, the clip nut 56, the anchor bolt 58, the nut 60, and the spacer 62 described above.

The clip nut 56 includes a clip 64, a washer plate 66, and a weld nut 67. The clip 64 is made of an elastically deformable metal plate material, and has an upper sandwiching piece portion 64A that constitutes an upper portion of the building and a lower sandwiching piece portion 64B that constitutes a lower portion of the building. , And a connecting piece 64C for connecting them.

More specifically, the upper clamping piece portion 64A and the lower clamping piece portion 64B are in a state where one end portions of the upper clamping piece portion 64A and the lower clamping piece portion 64B are in contact with each other, or a state in which a spacing smaller than the plate thickness of the floor girder 28 is provided, and the other ends. The parts are connected to each other via a connecting piece part 64C. Then, the clip 64 has a flange portion 28A on the lower side of the building of the floor girder 28 that is inserted between the upper holding piece portion 64A and the lower holding piece portion 64B from one end side thereof, so that by the restoring force thereof. The flange portion 28A can be held.

The washer plate 66 has a rectangular plate shape when viewed from the building height direction, and the plate thickness thereof is set to be larger than the plate thickness of the floor girder 28. The washer plate 66 is joined to the upper holding piece portion 64A at a joining portion (not shown) by welding or the like, with its lower surface being in surface contact with the upper surface of the upper holding piece portion 64A. A weld nut 67 is joined to the upper surface of the washer plate 66 at a joining portion (not shown) by welding or the like with its axial direction being the thickness direction of the washer plate 66.

The clip nut 56 configured as described above is attached to the flange portion 28A of the floor girder 28 on the lower side of the building with the weld nut 67 on the upper side of the building.

The anchor bolt 58 has a cylindrical shape, and a male screw portion 58A is provided at one end thereof. The anchor bolt 58 is arranged such that its longitudinal direction is the building height direction, and the nut 60 is screwed to the terminal end side of the male screw portion 58A.

The male screw portion 58A of the anchor bolt 58 is inserted from the lower side of the building into the not-shown inserted portions provided in the clip 64, the flange portion 28A, and the washer plate 66, and is screwed into the weld nut 67. Thus, the floor girder 28 is fixed. The flange portion 28A of the floor girder 28 is formed with insertion portions for inserting the anchor bolts 58 at predetermined intervals at a plurality of positions along the longitudinal direction thereof.

On the other hand, the other end of the anchor bolt 58 is inserted into the hole anchor 52. For this reason, in the present embodiment, the floor girder 28 and the pillar-shaped portion 42B are pin-joined by the support portion 54 with the building height direction as the axial direction. In other words, in the present embodiment, the peripheral portion of the pillar-shaped portion 42B in the floor girder 28 is rotatable around the building height direction with respect to the pillar-shaped portion 42B.

The spacer 62 has a rectangular plate shape in a plan view, and in a state where the plate thickness direction is the building height direction and the longitudinal direction is the direction orthogonal to the longitudinal direction of the main body portion 42A of the connecting beam 42. It is placed on the upper surface of the main body 42A. Two spacers 62 are provided as a set for one support portion 54 and are arranged on one side and the other side in the longitudinal direction of the main body portion 42A with respect to the anchor bolt 58, respectively. The plate thickness of the spacer 62 is set to be larger than the axial size of the nut 60.

On the other hand, the center pillar 68 is made of a steel material and, as shown in FIGS. 1 and 2, has a main body portion 69 that constitutes a main portion thereof, an upper mounting portion 70, and a lower mounting portion 72. It is configured to include. The main body 69 has a rectangular tubular shape extending in the building height direction, that is, a closed cross-sectional structure in which the cross-sectional shape viewed from the building height direction is a hollow rectangular shape. An upper mounting portion 70 is provided at the end of the main body 69 on the upper side of the building, and a lower mounting portion 72 is provided at the end of the main body 69 on the lower side of the building.

The upper mounting portion 70 is arranged along the side wall portion 70A arranged along the outdoor side surface of the web portion 26A of the ceiling girder 26 and the building lower side surface of the building lower side flange portion 26B of the ceiling girder 26. The lower wall portion 70</b>B is formed into an L-shape when viewed from the longitudinal direction of the ceiling girder 26.

The end of the main body 69 on the upper side of the building is joined to the surface of the lower wall 70B on the lower side of the building by a joining portion (not shown) such as welding.

On the other hand, on the side wall portion 70A, two inserted portions (not shown) are provided at predetermined intervals in the longitudinal direction of the ceiling girder 26, and the indoor side surface of the web portion 26A has the inserted portions. A corresponding weld nut (not shown) is provided. Then, the bolt 74 is screwed into the weld nut provided on the web portion 26A from the outdoor side of the side wall portion 70A, so that the middle pillar 68 is attached to the ceiling girder 26.

The lower mounting portion 72 is provided along the side wall portion 72A arranged along the outdoor surface of the web portion 28B of the floor girder 28 and the building upper side surface of the building upper side flange portion 28C of the floor girder 28. The upper wall portion 72</b>B to be arranged is formed into an L shape when viewed from the longitudinal direction of the floor girder 28.

The end of the main body 69 on the lower side of the building is joined to the surface of the upper wall 72B on the upper side of the building by a joining portion (not shown) such as welding.

On the other hand, the side wall 72A is provided with two not-shown inserted portions at predetermined intervals in the building height direction, and the indoor side surface of the web portion 28B corresponds to the inserted portions. A weld nut (not shown) is provided. Then, the bolts 76 are screwed into the weld nuts provided on the web portion 28B from the outdoor side of the side wall portion 72A, so that the middle pillar 68 is attached to the floor girder 28.

That is, the center pillar 68 is in a state of being pin-joined to each of the ceiling girder 26 and the floor girder 28.

Moreover, as shown in FIG. 3 and FIG. 7, the middle pillar 68 is arranged near the pillar 36 on the other side in one direction of the body 30 when viewed from the building height direction, and viewed from the building height direction. It is arranged near the support portion 54.

<Operations and effects of this embodiment>
Next, the operation and effect of this embodiment will be described.

In the present embodiment, as shown in FIG. 7, the building unit 14 including the skeleton 18 is arranged with one direction as the longitudinal direction to form the lower floor side of the building 10. A building unit 16 is placed on the upper surface of the building unit 14, and the building unit 16 constitutes the upper floor side of the building 10. The building unit 14 is supported by the foundation 12.

In addition, the building unit 16 includes a skeleton 30, and the pillar 36 on one side in one direction of the skeleton 30 is arranged so as to overlap the pillar 24 on the one side of the skeleton 18 when viewed from the building height direction. .. Therefore, on one side of the building unit 16 in one direction, a vertical load such as the dead weight of the building unit 16 transmitted from the column 36 on one side of the body 30 in one direction is supported by the column 24 on one side of the body 18 in one direction. be able to.

By the way, the building unit 16 is a setback unit in which the side surface 16A on the other side in one direction is offset to the side surface 14A on the other side in one direction in one direction. Therefore, a vertical load such as the own weight of the building unit 16 transmitted from the pillar 36 on the other side of the skeleton 30 in one direction is supported by the ceiling girder 26 of the skeleton 18, and the load is concentrated on the ceiling girder 26. Is possible. As a result, the rigidity of the building unit 14 against vertical load may be insufficient.

Further, since the building unit 14 is affected by a horizontal load due to an earthquake or the like, it is preferable that the rigidity against the horizontal load can be secured.

Here, in the present embodiment, as shown in FIG. 1, the center pillar 68 and the support portion 54 are provided. The middle pillar 68 is arranged near the pillar 36 on the other side of the skeleton 30 in one direction when viewed from the building height direction, and faces the ceiling girder 26 of the skeleton 18 and the ceiling girder 26 in the building height direction. The floor girders 28 of the skeleton 18 arranged in this manner are connected in the building height direction.

On the other hand, the support portion 54 is arranged near the center pillar 68 when viewed from the building height direction, and constitutes the floor girder 28 of the skeleton 18 and a part of the foundation 12 and on the lower side of the building of the floor girder 28. It is arranged and is interposed between the pillar-shaped portion 42B exposed on the ground. Therefore, in the present embodiment, the vertical load acting on the ceiling girder 26 of the skeleton 18 is transmitted to the floor girder 28 of the skeleton 18 via the center pillar 68, and the foundation girder via the floor girder 28 and the support portion 54. 12 and is supported by the foundation 12. As a result, the rigidity of the building unit 14 against a vertical load can be secured.

Further, in the present embodiment, the floor girder 28 of the skeleton 18 is pin-joined to the pillar-shaped portion 42B by the support portion 54 with the building height direction as the axial direction. Therefore, the load acting on the building unit 14 can be supported by the support portion 54 without generating a bending moment due to the load on the floor girder 28 of the frame 18. As a result, the rigidity of the building unit 14 against a horizontal load can be secured. Therefore, in this embodiment, the rigidity of the building unit 14 with respect to the horizontal load and the vertical load acting on the building unit 14 can be ensured.

Further, in the present embodiment, as shown in FIG. 6, the foundation 12 includes a connecting beam 42 that connects the rising portion 38B of the inner foundation 38 and the rising portion 40B of the outer peripheral foundation 40. The support portion 54 is supported by the pillar-shaped portion 42B provided on the connecting beam 42. Therefore, the load transmitted from the supporting portion 54 to the pillar-shaped portion 42B is dispersed to the outer peripheral foundation 40 side via the connecting beam 42. Therefore, in the present embodiment, the load acting on the building unit 14 can be supported in a stable state.

Returning to FIG. 1, in the present embodiment, the main body 69 of the middle pillar 68 has a closed cross-section structure in which the cross-sectional shape viewed from the building height direction is a hollow rectangular shape. It is possible to suppress the generation of the weak axis. Therefore, in the present embodiment, it is possible to stably support loads in various directions acting on the middle pillar 68 of the building unit 14.

In addition, in this embodiment, as shown in FIG. 2, the middle pillar 68 is pin-joined to each of the ceiling girder 26 and the floor girder 28 of the skeleton 18, so that It is possible to suppress the generation of a bending moment in the middle pillar 68 by transmitting the load to the pillar 68. Therefore, in the present embodiment, it is possible to suppress bending deformation of the middle pillar 68 of the building unit 14.

<Supplementary explanation of the above embodiment>
(1) In the above-described embodiment, the support portion 54 is configured to include the clip nut 56, but the configuration is not limited to this. For example, the weld nut 67 may be provided on the flange portion 28A of the floor girder 28 on the lower side of the building without using the clip nut 56.

(2) Further, in the above-described embodiment, the supporting portion of the supporting portion 54 is provided on the connecting beam 42, but the present invention is not limited to this. That is, the support portion of the support portion 54 may be provided on the independent foundation, or may be provided on the rising portion of the outer peripheral foundation 40 or the inner foundation 38.

(3) Further, in the above-described embodiment, the connecting beam 42 connects the rising portion 38B of the inner foundation 38 and the rising portion 40B of the outer peripheral foundation 40, but the connecting beam 42 connects a part of the rising portions 38B to each other. They may be connected, or a part of the rising portions 40B may be connected.

(4) In addition, the mounting position of the center pillar 68 to the ceiling girder 26 is such that the bending of the ceiling girder 26 is S/300 and 1 [cm] or less, where S is the length of the ceiling girder 26. Can be set arbitrarily. Further, the mounting position of the middle pillar 68 to the floor girder 28 can be arbitrarily set within a range in which the flexure of the floor girder 28 is 1 [cm] or less.

10 building 12 foundation 14 building unit (lower floor building unit)
14A Side surface 16 Building unit (upper floor side building unit)
16A side surface 18 body (first body)
24 pillars 30 skeleton (second skeleton)
36 pillars 38B rising part (first rising part, second rising part)
40 outer peripheral foundation 40B rising part (first rising part, second rising part)
42 Connecting beam 42B Column type part (exposed part)
54 Supporting part 68 Middle pillar

Claims (4)

A lower-floor building unit that includes a first skeleton, is arranged with one direction as a longitudinal direction, and constitutes a lower floor side of the building;
A second skeleton, and the pillar on the one side on one side of the second skeleton is overlapped with the pillar on the one side on the one side of the first skeleton when viewed from the building height direction. A setback unit that is placed on the upper surface and constitutes the upper floor side of the building, and the side surface of the one direction other side is offset to the one side with respect to the other side surface of the lower floor side building unit. And the building unit on the upper floor side,
A base supporting the lower floor building unit,
Equipped with
The ceiling girder of the first skeleton and the floor girder of the first skeleton, which is arranged to face the ceiling girder in the building height direction, are the second skeletons of the second skeleton when viewed from the building height direction. Connected in the building height direction with a middle pillar arranged near the pillar on the other side in one direction,
The floor girder and the exposed portion which is part of the foundation and is arranged on the lower side of the building of the floor girder and exposed on the ground are arranged in the vicinity of the middle pillar when viewed from the building height direction. It is pin-joined with the building height direction as the axial direction by the supporting portion interposed between the floor girder and the exposed portion.
Building reinforcement structure. The foundation is provided in parallel with the first rising portion that constitutes a part of the outer peripheral foundation or is continuous with the outer peripheral foundation, and is part of the outer peripheral foundation or is continuous with the outer peripheral foundation. A second rising portion, a connecting beam connecting the first rising portion and the second rising portion,
The exposed portion is a pillar-shaped portion provided on the connecting beam,
The reinforcing structure for a building according to claim 1. The middle pillar has a closed cross-section structure in which the cross-sectional shape viewed from the building height direction is a hollow rectangular shape,
The reinforcing structure for a building according to claim 1. The middle pillar is pin-bonded to each of the ceiling girder and the floor girder,
The reinforcing structure for a building according to any one of claims 1 to 3.