JP2023085078A - Structure - Google Patents

Abstract

To reduce a bending moment M borne by a core portion during an earthquake while increasing a ceiling height of a predetermined floor.SOLUTION: A structure 10 comprises: a beamless slab floor 30 having a pair of first outer walls 32A, 32B facing each other and having no internal beams and a slab 40 spanning the pair of first outer walls 32A, 32B; a bending transfer floor 60 provided above the beamless slab floor 30; and a core portion 50 including a core wall 52 and spanning the beamless slab floor 30 and the bending transfer floor 60. The bending transfer floor 60 includes: a lower stage slab 70 extending from the core portion 50 toward the first outer walls 32A, 32B side; a middle stage slab 72 and an upper stage slab 74 disposed above the lower slab 70 and extending from the core portion 50 toward the first outer walls 32A, 32B side; and a first inclined outer wall 64 connecting tip portions 70T, 72T, 74T in an extending direction of the lower stage slab 70, the middle stage slab 72, and the upper stage slab 74 and supported by the first outer walls 32A, 32B.SELECTED DRAWING: Figure 4

Description

The present invention relates to structures.

A structure is known that includes a core wall, a shaft wall, and a top girder (see Patent Document 1, for example).

Also known are structures having outer wall portions or wall panels that slope in accordance with the north oblique limit (see, for example, Patent Documents 2 and 3).

JP-A-7-18918 JP-A-11-29984 JP-A-2001-90199

For example, it is conceivable to omit the beams that support the slabs in order to increase the ceiling height on a given floor of a structure having a core.

However, if the beams on the predetermined floors are omitted, the bending moment acting on the core portion during an earthquake will not be transmitted to the outer frame such as the outer walls through the beams on the predetermined floors. Therefore, in the event of an earthquake, the bending moment borne by the core portion increases, and there is a possibility that the core portion will be damaged.

SUMMARY OF THE INVENTION In view of the above facts, it is an object of the present invention to increase the ceiling height of a given floor while reducing the bending moment that the core bears during an earthquake.

The structure according to claim 1 includes a beamless slab floor having a pair of outer frame structures facing each other and having no internal beams installed thereon, and a slab built over the pair of outer frame structures, and the beamless slab floor. and a seismic member comprising at least one of a core wall, a shaft wall, and a column, spanning said non-beam slab floor and said bending transfer floor, said bending transfer floor comprising: , a first slab extending from the earthquake-resistant member toward the outer frame, a second slab disposed above the first slab and extending from the earthquake-resistant member toward the outer frame, and the first slab and a bending transmission member that connects the ends of the second slab in the extending direction and is supported by the outer frame.

According to the structure of claim 1, it comprises a non-beam slab floor, a bending transmission floor, and an earthquake-resistant member. A beamless slab floor has a pair of outer frame and a slab. The pair of outer frame bodies are opposed to each other. In addition, no internal beams are installed on the pair of outer frame bodies. A slab is laid over the pair of outer frame bodies. In other words, the slab is a beamless slab that is not supported by internal beams.

As a result, in the present invention, the ceiling height of the non-beam slab floor can be increased compared to the case where the internal beams are installed between the pair of outer frame structures.

In addition, a bending transmission floor is provided above the non-beam slab floor. Seismic members are installed across the non-beam slab floor and the bending transfer floor. The seismic member includes at least one of a core wall, a shaft wall, and a column.

Here, the bending transfer floor has a first slab, a second slab and a bending transfer member. The first slab extends from the seismic member toward the outer frame. A second slab is placed above the first slab. The second slab extends from the seismic member toward the outer frame. The leading ends of the first slab and the second slab are connected to each other by a bending transmission member. This bending transmission member is supported by the outer frame.

As a result, the bending moment acting on the seismic member during an earthquake is transmitted from the seismic member to the outer frame of the non-beam slab floor via the first slab, the second slab, and the bending transfer member on the bending transfer floor. In other words, when a bending moment acts on the seismic members during an earthquake, a bending force is applied to the bending transmission members from the outer frame of the non-beam slab floor.

Therefore, in the present invention, it is possible to increase the ceiling height of the non-beam slab floor and reduce the bending moment borne by the earthquake-resistant members during an earthquake.

The structure according to claim 2 is the structure according to claim 1, wherein the tip of the second slab is arranged closer to the earthquake-resistant member than the tip of the first slab, The transmission member has an inclined concrete outer wall connecting the tip of the second slab and the tip of the first slab.

According to the structure of claim 2, the tip of the second slab is arranged closer to the earthquake-resistant member than the tip of the first slab. The bending transmission member also has an inclined concrete outer wall. The sloped concrete outer wall connects the tip of the second slab and the tip of the first slab.

Thereby, the first slab, the second slab, and the sloped concrete outer wall increase the rigidity of the seismic member. Therefore, the bending moment acting on the seismic member during an earthquake is efficiently transmitted to the outer frame of the non-beam slab floor via the first slab, second slab, and sloped concrete outer wall.

Therefore, the bending moment borne by the seismic member during an earthquake is further reduced.

The structure according to claim 3 is the structure according to claim 2, wherein the bending transfer floor is formed in a pyramid shape or a truncated pyramid shape, and the side surface of the bending transfer floor on the outer frame side is Formed by a first sloped concrete outer wall as a sloped concrete wall, the other side of said bending transfer floor adjacent to said first sloped concrete wall is formed by a second sloped concrete wall.

According to the structure according to claim 3, the bending transfer floor is formed in the shape of a pyramid or a truncated pyramid. The side surface of the bending transfer floor on the side of the outer frame is formed by the first sloped concrete outer wall as the sloped concrete outer wall. In addition, the other side of the transfer floor adjacent to the first sloped concrete outer wall is formed by the second sloped concrete outer wall.

Thereby, the rigidity of the earthquake-resistant member is further enhanced by the first sloped concrete outer wall and the second sloped concrete outer wall. Therefore, the bending moment acting on the seismic members during an earthquake is efficiently transmitted to the outer frame of the non-beam slab floor via the first slab, second slab, first sloped concrete outer wall, and second sloped concrete outer wall. be done.

Therefore, the bending moment borne by the seismic member during an earthquake is further reduced.

As described above, according to the present invention, it is possible to reduce the bending moment borne by the core portion during an earthquake.

It is a perspective view which shows the structure which concerns on one Embodiment. It is a perspective view which shows the structure which concerns on one Embodiment. Figure 3 is a closed section view of the beamless slab floor shown in Figures 1 and 2; 1 is a vertical cross-sectional view of a structure according to one embodiment; FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4; FIG.

Hereinafter, a structure according to one embodiment will be described with reference to the drawings.

(Structure)
1 and 2 show a structure 10 according to this embodiment. The structure 10 is, for example, a multi-story middle-rise building built on a narrow site.

As shown in FIG. 3, the structure 10 is formed in a rectangular shape in plan view. The structure 10 is, for example, a wall structure and an eccentric core structure.

As shown in FIG. 4, the structure 10 includes a foundation 20, a beamless slab floor 30 provided on the foundation 20, a bending transfer floor 60 provided on the beamless slab floor 30, and the foundation 20 , and includes a core portion 50 that spans the non-beam slab floor 30 and the bending transfer floor 60.

(foundation)
The foundation 20 is, for example, a direct foundation. Further, the foundation 20 is configured with a foundation slab and the like. The floor of the first floor of the structure 10 is formed by the upper surface 20U of the foundation 20 . Note that the foundation 20 of the structure 10 is not limited to a direct foundation, and may be, for example, a pile foundation.

(non-beam slab floor)
The non-beam slab floor 30 constitutes, for example, the lower floors of the structure 10 (second to third floors in this embodiment). As shown in FIG. 3, the non-beam slab floor 30 is formed in a rectangular shape in plan view. This beamless slab floor 30 has a pair of first outer walls 32A, 32B, a second outer wall 34, and a slab 40. As shown in FIG. The pair of first outer walls 32A and 32B is an example of a pair of outer peripheral skeletons.

A pair of first outer walls (first concrete outer walls) 32A and 32B are made of reinforced concrete and face each other in a predetermined direction (direction of arrow X). The pair of first outer walls 32A and 32B also function as earthquake-resistant walls that bear the seismic force (horizontal force) in the width direction (the arrow Y direction).

A slab 40 is laid over the pair of first outer walls 32A and 32B. The slab 40 is made of reinforced concrete and has a rectangular shape in plan view. A pair of first outer walls 32A and 32B are provided along both ends of the slab 40, respectively.

Here, the internal beams that support the slab 40 are not installed on the pair of first outer walls 32A and 32B. Therefore, the slab 40 is a beamless slab that is not supported by internal beams. As a countermeasure against this, the slab 40 is a prestressed slab as shown in FIG.

Specifically, inside the slab 40, a plurality of PC steel members 42 are embedded that extend in the facing direction of the pair of first outer walls 32A and 32B (see FIG. 3) and that are given tension. These PC steel materials 42 reduce the deflection amount of the slab 40 .

In addition, the "internal beam" here means a beam other than the outer peripheral beam arranged along the outer periphery of the non-beam slab floor 30. As shown in FIG. Also, the slab 40 is not limited to a prestressed slab, and may be, for example, a void slab.

As shown in FIG. 3, the pair of first outer walls 32A and 32B are connected to each other by a second outer wall 34 at one end in the width direction (the direction of the arrow X). The second outer wall (second concrete outer wall) 34 is made of reinforced concrete. In addition, the second outer wall 34 is arranged along the facing direction (arrow X direction) of the pair of first outer walls 32A and 32B. The second outer wall 34 also functions as a seismic wall that bears the seismic force (horizontal force) in the opposing direction of the pair of first outer walls 32A and 32B.

An opening 36 is formed between the other ends in the width direction of the pair of first outer walls 32A and 32B. The opening 36 is formed between the other ends of the first outer walls 32A, 32B. A glass window 38 is provided in the opening 36 . That is, one side of the non-beam slab floor 30 is glazed.

Thus, the non-beam slab floor 30 is provided with outer walls (first outer walls 32A, 32B and second outer wall 34) on three sides, and the remaining one side is open.

Note that the size and shape of the opening 36 can be changed as appropriate. Also, on one side of the beamless slab floor 30, instead of the opening 36, an outer wall may be provided.

(core part)
As shown in FIG. 3, the structure 10 is provided with a core portion 50 . The core portion 50 is arranged between the pair of first outer walls 32A and 32B and is located closer to one of the first outer walls 32A. That is, the core portion 50 is an eccentric core. Note that the core portion 50 is an example of an earthquake-resistant member.

The core portion 50 is formed in a rectangular tubular shape (frame shape) in plan cross-sectional view, and is used as an elevator shaft or an equipment shaft, for example. The core portion 50 has four core walls 52 made of reinforced concrete, and mainly bears the seismic force (horizontal force) in the opposing direction of the pair of first outer walls 32A and 32B.

The shape of the core portion 50 is not limited to the cylindrical closed cross-sectional shape, and may be an open cross-sectional shape.

As shown in FIG. 4 , the core portion 50 extends upward from the foundation 20 along one of the first outer walls 32A and vertically penetrates the beamless slab floor 30 . Further, the core portion 50 vertically penetrates the lower slab 70 and the middle slab 72 along the outer wall 62 of the bending transfer floor 60 to be described later, and its upper end reaches the upper slab 74 of the bending transfer floor 60 to be described later. there is

(bending transmission floor)
As shown in FIGS. 1 and 2, the bending transfer floor 60 is formed in a pyramidal shape in accordance with the north slope limit or the road slope limit. More specifically, the bending transfer floor 60 is formed in the shape of a quadrangular pyramid. This bending transfer floor 60 constitutes the top floor of the structure 10 and also constitutes the roof of the structure 10 .

The bending transfer floor 60 has an outer wall 62 , a first sloped outer wall 64 and two second sloped outer walls 66 . The outer wall 62, the first inclined outer wall 64, and the two second inclined outer walls 66 are made of reinforced concrete and form each side of the bending transfer floor 60 in the shape of a quadrangular pyramid. Each of the outer wall 62, the first inclined outer wall 64, and the second inclined outer wall 66 is formed in a triangular shape with a width that narrows upward as viewed in the thickness direction.

The first inclined outer wall 64 is an example of a first inclined concrete outer wall, and the second inclined outer wall 66 is an example of a second inclined concrete outer wall.

As shown in FIG. 4 , the outer wall (concrete outer wall) 62 extends upward from the upper end of one of the first outer walls 32A of the non-beam slab floor 30 . A core portion 50 is provided along the inner wall surface of the outer wall 62 . A first inclined outer wall 64 is arranged on the side opposite to the outer wall 62 .

The first slanted outer wall (first slanted concrete outer wall) 64 forms a side surface (slanted side surface) on the other first outer wall 32B side of the bending transfer floor 60 . This first inclined outer wall 64 extends upward and inward (first outer wall 32A side) from the upper end of the other first outer wall 32B of the non-beam slab floor 30 . In other words, the first slanted outer wall 64 is slanted upwards toward the inside of the bending transfer floor 60 .

As shown in FIGS. 1 and 2, two second slanted outer walls (second slanted concrete outer walls) 66 are disposed on either side of the first slanted outer wall 64 and are adjacent to the first slanted outer wall 64 for bending transmission. It forms the other side (inclined side) of the floor 60 . One second inclined outer wall 66 extends upward and inward (opening 36 side) from the upper end of the second outer wall 34 of the non-beam slab floor 30 . In other words, one second slanted outer wall 66 is slanted upwards toward the inside of the bending transfer floor 60 .

The other second inclined outer wall 66 extends upward and inward (toward the second outer wall 34) from the end of the lower slab 70, which will be described later. In other words, the other second slanted outer wall 66 is slanted upwards toward the inside of the bending transfer floor 60 .

Windows (openings) may be formed in the outer wall 62 , the first inclined outer wall 64 , and the second inclined outer wall 66 .

As shown in FIG. 4, the bending transfer floor 60 is composed of a plurality of floors (fourth to fifth floors in this embodiment). This bending transfer floor 60 has a plurality of slabs 70, 72, 74 made of reinforced concrete. The plurality of slabs 70, 72, 74 are arranged at intervals in the vertical direction.

For convenience of explanation, the plurality of slabs 70 , 72 , 74 are hereinafter referred to as a lower slab 70 , a middle slab 72 , and an upper slab 74 in order from the bottom. Also, the lower slab 70 is an example of a first slab, and the middle slab 72 and upper slab 74 are examples of a second slab.

The lower slab 70 is a boundary slab arranged on the boundary between the non-beam slab floor 30 and the bending transfer floor 60 . That is, the lower slab 70 forms the ceiling slab of the top floor of the non-beam slab floor 30 and forms the floor slab of the bottom floor of the bending transfer floor 60 .

The lower slab 70, like the slab 40 of the non-beam slab floor 30, spans the pair of first outer walls 32A and 32B. The lower slab 70 extends from the core portion 50 to the other first outer wall 32B side, and the leading end portion 70T in the extending direction is the upper end portion of the other first outer wall 32B and the lower end portion of the first inclined outer wall 64 . It is connected to the.

Similarly to the slab 40, the lower slab 70 is a beamless slab that is not supported by internal beams and is a prestressed slab (or void slab). As a result, the ceiling height of the top floor of the non-beam slab floor 30 is high.

The middle slab 72 is the uppermost floor slab of the bending transfer floor 60 . The intermediate slab 72 is laid over the outer wall 62 of the bending transfer floor 60 and the first inclined outer wall 64 . Further, the middle slab 72 extends from the core portion 50 toward the other first outer wall 32B side (the first inclined outer wall 64 side). A leading end portion 72T of the intermediate slab 72 in the extending direction is arranged closer to the core portion 50 than the leading end portion 70T of the lower slab 70 and is connected to an intermediate portion of the first inclined outer wall 64 .

The upper slab 74 is the ceiling slab on the top floor of the bending transfer floor 60 . The upper slab 74 is laid over the outer wall 62 of the bending transfer floor 60 and the first inclined outer wall 64 . Further, the upper slab 74 extends from the core portion 50 toward the other first outer wall 32B side (the first inclined outer wall 64 side). A leading end portion 74T of the upper slab 74 in the extending direction is arranged closer to the core portion 50 than a leading end portion 72T of the intermediate slab 72 and is connected to an intermediate portion of the first inclined outer wall 64 .

In this embodiment, the middle slab 72 and the upper slab 74 are supported by internal beams 76 that extend between the outer wall 62 and the first inclined outer wall 64 . Therefore, the middle slab 72 and the upper slab 74 are not prestressed slabs (or void slabs) but normal slabs. However, it is also possible to omit the internal beams 76 and use the middle slab 72 and the upper slab 74 as prestressed slabs (or void slabs).

Here, the first inclined outer wall 64 connects the tip portions 70T, 72T, 74T of the lower slab 70, the middle slab 72, and the upper slab 74. As shown in FIG. The first inclined outer wall 64 , the lower slab 70 , the middle slab 72 , and the upper slab 74 increase the rigidity of the core portion 50 in the bending transfer floor 60 .

Also, the lower end of the first inclined outer wall 64 is supported by the other first outer wall 32B of the non-beam slab floor 30 . As a result, the bending moment M acting on the core portion 50 during an earthquake is transmitted to the other first outer wall 32B of the non-beam slab floor 30 via the first inclined outer wall 64 .

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

As shown in FIG. 4 , the structure 10 according to this embodiment includes a non-beam slab floor 30 , a bending transfer floor 60 and a core portion 50 . The beamless slab floor 30 has a pair of first outer walls 32A, 32B and a slab 40. - 特許庁

The pair of first outer walls 32A, 32B face each other. A slab 40 is laid over the pair of first outer walls 32A and 32B without building an internal beam. That is, the slab 40 is a beamless slab that is not supported by internal beams.

Thereby, in this embodiment, the ceiling height of the non-beam slab floor 30 can be increased compared with the case where the internal beams are constructed between the pair of first outer walls 32A and 32B.

A bending transfer floor 60 is provided above the non-beam slab floor 30 . A core portion 50 is provided across the non-beam slab floor 30 and the bending transfer floor 60 .

Here, the bending transfer floor 60 has a lower slab 70 , a middle slab 72 and an upper slab 74 . The lower slab 70, the middle slab 72, and the upper slab 74 are vertically spaced apart and extend from the core portion 50 toward the other first outer wall 32B.

Tip portions 70T, 72T, and 74T of the lower slab 70, the middle slab 72, and the upper slab 74 are connected by the first inclined outer wall 64. As shown in FIG. The lower slab 70 , the middle slab 72 , the upper slab 74 , and the first inclined outer wall 64 increase the rigidity of the core portion 50 in the bending transfer floor 60 .

In addition, the lower end of the first inclined outer wall 64 is supported by the upper end of the other first outer wall 32B of the beamless slab floor 30 . As a result, the bending moment M acting on the core portion 50 during an earthquake is transmitted through the lower slab 70, the middle slab 72, the upper slab 74, and the first inclined outer wall 64 to the other first outer wall of the non-beam slab floor 30. 32B. In other words, when a bending moment M acts on the core portion 50 during an earthquake, a bending return force F is applied from the other first outer wall 32B of the non-beam slab floor 30 to the lower end of the first inclined outer wall 64 of the bending transfer floor 60. works.

In this way, the lower slab 70, the middle slab 72, the upper slab 74, and the first inclined outer wall 64 transfer the bending moment M acting on the core portion 50 to the other first outer wall 32B of the non-beam slab floor 30 during an earthquake. It functions as a transmitting outrigger.

Therefore, in this embodiment, it is possible to increase the ceiling height of the non-beam slab floor 30 and reduce the bending moment M borne by the core portion 50 during an earthquake. Furthermore, in this embodiment, a large opening 36 can be formed on one side of the non-beam slab floor 30 .

Also, the first inclined outer wall 64 of the bending transfer floor 60 is inclined inwardly of the bending transfer floor 60 from the upper end of the first outer wall 32B. Accordingly, in this embodiment, the transmission path of the bending moment M from the core portion 50 to the upper end portion of the first outer wall 32B is shortened compared to the case where the first inclined outer wall 64 is not inclined.

Therefore, in the present embodiment, the first slanted outer wall 64 is used to efficiently transfer the bending moment M acting on the core portion 50 to the upper end portion of the first outer wall 32B during an earthquake while coping with the oblique line restriction on the north side and the slanted line restriction on the road. can be transmitted.

Furthermore, the bending transfer floor 60 is formed in the shape of a pyramid. The other side of the bending transfer floor 60 on the side of the first outer wall 32B is formed by a first inclined outer wall 64 . The other two sides of the bending transfer floor 60 adjacent to the first slanted outer wall 64 are formed by a second slanted outer wall 66 .

Thereby, the rigidity of the core portion 50 is further enhanced by the first inclined outer wall 64 and the second inclined outer wall 66 . Therefore, while the first inclined outer wall 64 and the second inclined outer wall 66 correspond to the north side oblique limit and the road oblique limit, the bending moment M acting on the core portion 50 during an earthquake is further transferred to the upper end portion of the first outer wall 32B. It can be transmitted efficiently.

Further, the core portion 50 is arranged closer to one of the pair of first outer walls 32A and 32B on the side of the first outer wall 32A. That is, the core portion 50 is an eccentric core. Thereby, in this embodiment, the effective space of the structure 10 can be expanded compared with the case where the core part 50 is a center core.

Furthermore, the structure 10 is a wall structure. Thereby, in the present embodiment, the rigidity of the structure 10 can be increased as compared with the case where the structure 10 has a frame structure (a rigid-frame frame structure).

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

In the above embodiment, the lower slab 70 of the bending transfer floor 60 is the first slab, and the middle slab 72 and upper slab 74 are the second slabs. However, for example, the lower slab 70 may be the first slab and one of the middle slab 72 and the upper slab 74 may be the second slab, or the middle slab 72 may be the first slab and the upper slab 74 may be the second slab. It may be considered a slab. Also, the bending transfer floor 60 should have at least one first slab and at least one second slab.

Moreover, in the above-described embodiment, the bending transfer floor 60 is composed of a plurality of floors. However, the bending transfer floor may also consist of one floor. Similarly, in the above-described embodiment, the non-beam slab floor 30 is composed of a plurality of floors. However, the non-beam slab floor may consist of one floor.

Further, in the above embodiment, the bending transmission member is the first inclined outer wall 64 . However, the bending transmission member is not limited to the first inclined outer wall 64 . For example, if the bending transfer floor is not a wall structure but a frame structure, the bending transfer members may be braces or steel frames arranged along the side surface of the bending transfer floor 60 on the side of the first outer wall 32B.

Moreover, in the above-described embodiment, the bending transfer floor 60 is formed in a pyramid shape. However, the bending transfer floor 60 is not limited to a pyramid shape, and may be formed in a truncated pyramid shape or a rectangular parallelepiped shape, for example. When the bending transfer floor 60 is rectangular parallelepiped, for example, the outer wall (concrete outer wall) provided on the other first outer wall 32B of the non-beam slab floor 30 corresponds to the bending transfer member.

Further, in the above embodiment, the pair of outer frame structures of the non-beam slab floor 30 are the pair of first outer walls 32A, 32B. However, the pair of outer peripheral skeletons is not limited to the pair of first outer walls 32A, 32B. For example, if the non-beam slab floor is not a wall structure but a frame structure, the pair of outer frames may be, for example, a beam-column structure facing each other.

Moreover, let the core part 50 of the said embodiment be an eccentric core. However, the core portion is not limited to the eccentric core, and may be, for example, a center core. In this case, the bending moment acting on the core during an earthquake is transmitted from the core through the first slab, the second slab, and the bending transmission members to the pair of outer frame structures of the non-beam slab floor. .

Further, in the above-described embodiment, the earthquake-resistant member is the core portion 50 . However, the earthquake-resistant member is not limited to the core portion 50, and can be formed including at least one of a core wall, a shaft wall, and a pillar.

Moreover, the above embodiment is applicable not only to a medium-rise building built on a narrow site, but also to a low-rise building or a high-rise building. Moreover, the above embodiment can be applied to various structures such as reinforced concrete construction and steel construction.

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 Structure 30 Non-beam slab floor 32A First outer wall (a pair of outer frame)
32B first outer wall (a pair of outer frame)
40 Slab 50 Core part (earthquake-resistant member)
52 Core wall 60 Bending transmission floor 64 First inclined outer wall (first inclined concrete outer wall, bending transmission member)
66 second sloped outer wall (second sloped concrete outer wall)
70 lower slab (first slab)
70T tip (tip in extension direction of first slab)
72 middle slab (second slab)
72T tip (tip in extension direction of second slab)
74 upper slab (second slab)
74T tip (tip in extension direction of second slab)

Claims (3)

a beamless slab floor having a pair of outer frame structures facing each other and having no internal beams installed thereon, and a slab built over the pair of outer frame structures;
a bending transmission floor provided on the non-beam slab floor;
a seismic member comprising at least one of a core wall, a shaft wall, and a column and spanning the non-beam slab floor and the bending transfer floor;
with
The bending transfer floor is
a first slab extending from the earthquake-resistant member toward the outer frame;
a second slab disposed above the first slab and extending from the earthquake-resistant member toward the outer frame;
a bending transmission member that connects ends of the first slab and the second slab in the extending direction and is supported by the outer frame;
A structure with the tip portion of the second slab is arranged closer to the earthquake-resistant member than the tip portion of the first slab;
The bending transmission member has an inclined concrete outer wall connecting the tip of the second slab and the tip of the first slab,
A structure according to claim 1. The bending transfer floor is formed in a pyramid shape or a truncated pyramid shape,
The side surface on the outer frame side of the bending transfer floor is formed by a first sloped concrete outer wall as the sloped concrete outer wall,
the other side of the bending transfer floor adjacent to the first sloped concrete outer wall is formed by a second sloped concrete outer wall;
3. A structure according to claim 2.

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