Apartment building

Abstract

To provide apartment buildings with enhanced openness of housing units in corner sections.SOLUTION: An apartment building 1 comprises: a corner slab 5 having a first inner peripheral portion 6 with an inner end portion 9 and a first outer end portion 10, a second inner peripheral portion 7 with the inner end portion 9 and a second outer end portion 11, and an outer peripheral portion 8 connecting the first outer end portion 10 and the second outer end portion 11; a tension member 31 extending within the corner slab 5 and subjected to tensile force; a first anchorage portion 19 of the tension member 31 located near the first outer end portion 10 of the corner slab 5; and a second anchorage portion 20 of the tension member 31 located near the second outer end portion 11 of the corner slab 5. The outer peripheral portion 8 is located outside a straight line L connecting the first anchorage portion 19 and the second anchorage portion 20. An area S between the straight line L and the outer peripheral portion 8 of the corner slab 5 is not supported by a column 101, and the tension member 31 extends through the area S.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to apartment buildings. [Background technology]

[0002] In apartment buildings, especially tower-shaped apartment buildings, corner units facing two directions are considered to be of high value. Patent Document 1 describes a tower-shaped apartment building in which the corners are cut off and pillars are installed at positions away from the corners. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-82868 Summary of the Invention [Problem to be solved by the invention]

[0004] Corner units face two directions, offering good views and a sense of openness. However, because pillars are usually installed at the corners, the advantages of corners are not fully utilized. The apartment complex described in Patent Document 1 has rounded corners, so there are no pillars at the corners, but because pillars are installed nearby, it still cannot be said that the advantages of corners are utilized.

[0005] The present invention aims to provide an apartment building with improved openness in corner units. [Means for solving the problem]

[0006] The apartment building of the present invention includes a corner slab having a first inner periphery having an inner end and a first outer end, a second inner periphery having an inner end and a second outer end, and an outer periphery connecting the first outer end and the second outer end, tendons extending inside the slab and under tension, a first anchorage of the tendon located near the first outer end of the slab, and a second anchorage of the tendon located near the second outer end of the slab. The outer periphery is located outside a straight line connecting the first anchorage and the second anchorage, and the region between the straight line and the outer periphery of the slab is not supported by columns, and the tendons extend through this region. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide an apartment building in which the openness of the dwelling units in the corner areas is improved. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a plan view of a representative floor of an apartment building according to a first embodiment of the present invention. [Figure 2] 2 is a partial enlarged view and a cross-sectional view of FIG. 1. FIG. [Figure 3] FIG. 10 is a conceptual diagram showing a modified example of the slab at the corner. [Figure 4] 10A and 10B are a partial enlarged view and a cross-sectional view of an apartment building according to a second embodiment of the present invention. [Figure 5] FIG. 10 is a partially enlarged view of an apartment building according to a third embodiment of the present invention. [Figure 6] FIG. 10 is a schematic perspective view of a slab at a corner of an apartment building according to a fourth embodiment of the present invention. [Figure 7] FIG. 10 is a partially enlarged view of an apartment building according to a fifth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Several embodiments of the apartment building of the present invention will be described with reference to the drawings. The embodiments are directed to tower-shaped apartment buildings, but the present invention is also applicable to slab-shaped apartment buildings. In the following description and drawings, the X and Y directions are horizontal directions that are perpendicular to each other and parallel to the arrangement direction of the columns and the extension direction of the beams. The Z direction is the vertical or up-down direction and is perpendicular to the X and Y directions. "Outside" and "inside" refer to the directions away from and toward the center of the apartment building, respectively, when viewed from the Z direction. The apartment building has a generally rectangular planar shape with four rounded corners. However, as will be described later, the shape of the corners is not limited.

[0010] (First embodiment) FIG. 1 is a plan view of a representative floor of an apartment building 1, FIG. 2(a) is an enlarged view of section A in FIG. 1, FIG. 2(b) is a cross-sectional view taken along line BB in FIG. 1, and FIG. 2(c) is a cross-sectional view taken along line CC in FIG. 1. FIG. 1 shows only the columns 2, beams 3, and slab 4 of the apartment building 1. The basic structure of the apartment building 1 is a rigid frame structure made of reinforced concrete, with columns 2 arranged in the X and Y directions and beams 3 extending between the columns 2 in the X and Y directions. Dwelling units (not shown) are provided along the exterior walls of the apartment building 1, and shared facilities (not shown), such as elevators and stairs, are located in the center of the apartment building 1. The four corners have an overhanging structure supported by the surrounding columns 2 and beams 3. Since all four corners have the same structure, the following describes the configuration of corner A in FIG. 1.

[0011] The corner slab 4 of the apartment building 1 (hereinafter referred to as the corner slab 5) has a first inner peripheral edge 6, a second inner peripheral edge 7, and an outer peripheral edge 8 in plan view from the Z direction. The first inner peripheral edge 6 extends between an inner end 9 and a first outer end 10, and the second inner peripheral edge 7 extends between the inner end 9 and a second outer end 11. The first inner peripheral edge 6 and the second inner peripheral edge 7 are partially bent at the positions of the columns 12 to 14, but the first inner peripheral edge 6 extends overall in the X direction, and the second inner peripheral edge 7 extends overall in the Y direction. The outer peripheral edge 8 connects the first outer end 10 and the second outer end 11. The outer peripheral edge 8 has a straight portion 8A connected to the first outer end 10, a straight portion 8B connected to the second outer end 11, and a curved portion 8C whose both ends are connected to the straight portions 8A and 8B. The curved portion 8C is an arc of a quadrant.

[0012] A first column 12 and a third column 14 are provided along the first inner periphery 6, and a second column 13 and a third column 14 are provided along the second inner periphery 7. The first column 12 is provided near the first outer end 10, the second column 13 is provided near the second outer end 11, and the third column 14 is provided near the inner end 9. A first beam 15 is provided between the first column 12 and the third column 14, and a second beam 16 is provided between the second column 13 and the third column 14. Therefore, the weight of the corner slab 5 is mainly supported by the first and second beams 15 and 16 and the first to third columns 12 to 14. A first exterior wall 17 and a second exterior wall 18 are provided adjacent to the corner slab 5. The first outer wall 17 is provided laterally on the first inner periphery 6 and the second outer wall 18 is provided laterally on the second inner periphery 7 .

[0013] The corner slab 5 contains tendons 31 made of prestressing steel wires or stranded prestressing steel wires. As shown in Figure 2(c), the tendons 31 extend inside the corner slab 5 and are tensioned. The tensioning method is not limited; either post-tensioning or pre-tensioning can be used. One example of a post-tensioning method is the SM Unbond method developed by Sumitomo Electric Industries, Ltd. The tendons 31, covered with a polyethylene sheath, are installed in a designated position, reinforcement is arranged, and concrete is poured. Then, post-tensioning is performed using fixing devices. The sheath is greased, eliminating the need for grout injection. With the pre-tensioning method, after the tendons 31 are installed and reinforcement is arranged, pre-tensioning is performed on the tendons 31, and then concrete is poured.

[0014] First and second anchorages 19, 20 are provided to apply tension to the tendons 31. The first and second anchorages 19, 20 are preferably provided near the outer peripheral edge 8 of the corner slab 5, thereby allowing compression to be applied over a wide area of ​​the corner slab 5. In this embodiment, the first anchorage 19 is provided near the first outer end 10 of the corner slab 5, specifically, on the outside of the first exterior wall 17 and inside the first outer end 10, and the second anchorage 20 is provided near the second outer end 11 of the corner slab 5, specifically, on the outside of the second exterior wall 18 and inside the second outer end 11. The first anchorage 19 is closest to the first column 12 of the first to third columns 12-14 supporting the corner slab 5, and the second anchorage 20 is closest to the third column 14 of the first to third columns 12-14 supporting the corner slab 5. A fixing device (not shown) is provided in the first fixing section 19 and the second fixing section 20. As the fixing device, a general device using a wedge, a screw, or the like can be used.

[0015] The slab 1 includes a first support 21 to which a first anchoring portion 19 is attached, and a second support 22 to which a second anchoring portion 20 is attached. The first support 21 is a cantilever beam that protrudes outward from the first column 12 in a direction parallel to the first beam 15 (X direction), and the second support 22 is a cantilever beam that protrudes outward from the second column 13 in a direction parallel to the second beam 16 (Y direction). The first anchoring portion 19 is provided on the surface of the first support 21 opposite the corner slab 5, and the second anchoring portion 20 is provided on the surface of the second support 22 opposite the corner slab 5. The first and second anchoring portions 21, 22 and the first and second anchoring portions 19, 20 are provided on the outside of the exterior wall 23 of the corner slab 5. The first support 21 and the second support 22 are provided with through holes (not shown) through which the tendons 31 pass.

[0016] The tendon 31 is located at an intermediate position 31D between the first anchorage 19 and the second anchorage 20, lower in the Z direction than the first anchorage 19 and the second anchorage 20. That is, the tendon 31 gradually descends from the first anchorage 19 toward the intermediate position 31D and then gradually ascends from the intermediate position 31D toward the second anchorage 20. The intermediate position 31D is preferably equidistant from the first anchorage 19 and the second anchorage 20, but may be slightly offset from the equidistant position. By arranging the tendon 31 in this manner, the corner slab 5 receives an upward force from the tendon 31, thereby suppressing deformation due to the corner slab's own weight. The corner slab 5 has a thickness sufficient to accommodate the height difference of the tendon 31 in the Z direction. In this embodiment, the corner slab 5 is a flat slab with a constant thickness and no sub-beams.

[0017] The outer peripheral edge 8 is located outside the straight line L connecting the first anchorage 19 and the second anchorage 20. The tendon 31 is inside the corner slab 5 and extends in the region S between the line L and the outer peripheral edge 8. Since the region S includes the line L, the tendon 31 may extend linearly along the line L between the first anchorage 19 and the second anchorage 20, but it is preferable that the tendon 31 have an outward convex shape as shown in the figure in order to apply an inward force to the corner slab 5. Although the outer peripheral edge 8 is included in the region S, it is not inside the corner slab 5 and is therefore not included in the laying route of the tendon 31. In this embodiment, the tendon 31 comprises a first portion 31A extending from the first anchoring portion 19 in a direction perpendicular to the first inner peripheral edge portion 6, a second portion 31B extending from the second anchoring portion 20 in a direction perpendicular to the second inner peripheral edge portion 7, and an arc-shaped portion 31C connecting the first portion 31A and the second portion 31B. The arc-shaped portion 31C is, for example, a quadrant arc.

[0018] Because the corner slab 5 configured in this manner is supported by the tendons 31, there is no need for the columns 101 that are normally provided at the outer corners of the corner slab 5. That is, in this embodiment, the area S between the straight line L of the corner slab 5 and the outer peripheral edge 8 is not supported by the columns 101. As a result, the two faces facing the exterior wall 23 of the dwelling unit are continuous without the need for the columns 101, improving the view and openness. When columns 101 are present, the floor plan is usually designed to avoid the columns 101, but in this embodiment, there is no such restriction, which also increases the freedom of the floor plan.

[0019] The shape of the outer peripheral edge 8, i.e., the shape of the corner slab 5, is not limited. Figure 3 shows modified shapes of the corner slab 5. In the example shown in Figure 3(a), the corner slab 5 is rectangular. In the example shown in Figure 3(b), the corner slab 5 has a rectangular shape with the corners cut off in a straight L shape. In the example shown in Figure 3(c), the corner slab 5 has a shape with a rectangular extension on the outside. As can be seen from these figures, the laying route of the tendons 31 can be determined appropriately depending on the shape of the corner slab 5.

[0020] (Second embodiment) A second embodiment of the present invention will be described with reference to Figure 4. Figure 4(a) is an enlarged view of the vicinity of the corner slab 5, and corresponds to Figure 2(a). Figure 4(b) is a cross-sectional view of the vicinity of the corner slab 5, and corresponds to Figure 2(b). Configurations and effects that are not described are the same as those of the first embodiment. In this embodiment, the first column 12 located near the first anchoring portion 19 supports the first anchoring portion 19, and the second column 13 located near the second anchoring portion 20 supports the second anchoring portion 20. In other words, compared to the first embodiment, the first support portion 21 and the second support portion 22 have been deleted, and the first column 12 and the second column 13 have been expanded. In order to attach the first fixing portion 19 and the second fixing portion 20, the horizontal cross section (XY plane) of the first pillar 12 has an elongated shape in a direction parallel to the first inner peripheral portion 6 (X direction), and the horizontal cross section of the second pillar 13 has an elongated shape in a direction parallel to the second inner peripheral portion 7 (Y direction).

[0021] In this embodiment, the first anchoring portion 19 and the second anchoring portion 20 are attached directly to the first column 12 and the second column 13, respectively, simplifying the support structure for the first anchoring portion 19 and the second anchoring portion 20. Compared to the first embodiment, it is easier to increase the cross-sectional area of ​​the first column 12 and the second column 13, so the load-bearing force of the omitted corner column 101 can be substituted, and the strength of the building can be easily ensured. In addition, the first support portion 21 and the second support portion 22 are no longer necessary, and the workability of the columns does not change significantly depending on the cross-sectional area, improving the workability of the building.

[0022] (Third embodiment) A third embodiment of the present invention will be described with reference to Figure 5. Figure 5 is an enlarged view of the vicinity of the corner slab 5, corresponding to Figure 2(a). The configuration and effects omitted are the same as those of the first embodiment. The corner slab 5 in this embodiment is precast. Because the corner slab 5 can be fabricated in a factory, on-site work is reduced. While the corner slab 5 can be a single slab, a separate type is preferable for transportation and lifting equipment performance. Referring to Figure 5(a), the corner slab 5 is divided into one inner precast section 51 and three outer precast sections 52. The outer precast sections 52 are arranged along the outer periphery 8. Sheaths containing the tendons 31 are pre-installed in each of the three outer precast sections 52. During construction, the inner precast section 51 is first installed in its designated position, followed by the outer precast section 52. Next, the tendons 31 are inserted into the sheaths of the three outer precast sections 52, and tension is applied. The three outer precast sections 52 are pressed against the inner precast section 51 by the tendons 31, so that the inner precast section 51 and the three outer precast sections 52 are crimped together and integrated.

[0023] Referring to Figure 5(b), the corner slab 5 is divided into three inner precast sections 51 and one outer precast section 52. The outer precast section 52 is arranged along the outer periphery 8. The three inner precast sections 51 are arranged circumferentially around the third column 14. The construction procedure is similar to that of Figure 5(a), but the tendons 31 can be attached to the outer precast section 52 in advance at the factory, reducing the amount of on-site work.

[0024] Grout may be provided on the joint surface between the inner precast section 51 and the outer precast section 52, or a concave-convex shape such as a key may be provided so that the concave-convex shapes interlock with each other. The number and shape of the divisions of the corner slab 5 are not limited to those shown in the figure, and can be determined taking into consideration the shape of the corner slab 5 and the performance of the lifting machine. The corner slab 5 is preferably divided into at least one inner precast section 51 and at least one outer precast section 52 that is located at least outside the inner precast section 51 and along the outer peripheral edge 8.

[0025] (Fourth embodiment) A fourth embodiment of the present invention will be described with reference to FIG. 6. FIG. 6 is a schematic perspective view of a corner slab 5 viewed from below, with columns and beams omitted. The omitted configuration and effects are similar to those of the first embodiment. The corner slab 5 has a beam-shaped portion 24 extending along the underside of the corner slab 5 along the path of the tendons 31. The tendons 31 are housed in the beam-shaped portion 24. The area where the tendons 31 are not located can be the same thickness as the other slabs, thereby minimizing the weight increase of the corner slab 5 and the burden on the tendons 31. Furthermore, while the floor height directly below the beam-shaped portion 24 is reduced, the remaining area can maintain the same floor height as the other dwelling units. In FIG. 6, the beam-shaped portion 24 extends from the first inner peripheral portion 6 to the second inner peripheral portion 7. However, it may be provided only in the area necessary to house the tendons 31 (e.g., area B indicated by the arrow). Alternatively, the height of the beam-shaped portion 24 may be continuously changed depending on the Z-direction position of the tendons 31. That is, the height of the beam-shaped portion 24 at the bottom of the tendon 31 in the Z direction may be set to the maximum, and the height may be gradually reduced on both sides thereof.

[0026] (Fifth embodiment) A fifth embodiment of the present invention will be described with reference to FIG. 7. FIG. 7(a) is an enlarged view of the vicinity of the corner slab 5, corresponding to FIG. 4(a). The configuration and effects omitted are similar to those of the second embodiment. The corner slab 5 of this embodiment has a diagonal beam 25 connecting the first column 12 and the second column 13. The diagonal beam 25 is linear, and the center line of the diagonal beam 25 is parallel to or coincides with the line L. The corner slab 5 is divided into a triangular inner slab 53 formed by the diagonal beam 25 and the first and second beams 15, 16, and an outer slab 54 located outside the inner slab 53 and equipped with tendons 31. In other words, unlike the beam-shaped portion 24 of the fourth embodiment, the diagonal beam 25 is located inside the tendons 31. The inner slab 53 is surrounded by the diagonal beam 25 and the first and second beams 15, 16, and its weight is supported by the first column 12, the second column 13, and the third column 14. Therefore, the inner slab 53 is supported in the same way as other rectangular slabs. The tendons 31 only need to support the weight of the outer slab 54, which makes it possible to reduce the number and thickness of the tendons 31. In addition, the diagonal beams 25 form a self-balance because they receive compressive force from the tendons 31, and the force flowing from the corner slab 5 to the surrounding columns and beams is also limited, which simplifies the structural design of the columns and beams.

[0027] FIG. 7(b) is an enlarged view of the vicinity of the corner slab 5 in a modified version of the fifth embodiment. The corner slab 5 in this embodiment is precast, as in the third embodiment. The diagonal beams 25 are configured similarly to those in the fifth embodiment. The corner slab 5 is divided into two inner precast sections 51 and three outer precast sections 52. The number and shape of the sections of the corner slab 5 are not limited to those shown in the figure and can be determined taking into account the shape of the corner slab 5 and the performance of the lifting machine. It is preferable that the corner slab 5 be divided into at least one inner precast section 51 and at least one outer precast section 52 located outside the inner precast section 51 and along the outer peripheral edge 8. The corner slab 5 can be fabricated in a factory, reducing the amount of on-site work.

[0028] In this embodiment, the diagonal beam 25 is supported by the first pillar 12 and the second pillar 13 with a rectangular cross section, but it may also be supported by the first pillar 12 and the second pillar 13 of the first embodiment, and the shapes of the first pillar 12 and the second pillar 13 are not limited. Also, in this embodiment, multiple tendons 31 are arranged, but the number of tendons 31 is not limited, and the multiple tendons 31 of this embodiment may be applied to the first to fourth embodiments. [Explanation of symbols]

[0029] 1 Apartment complex 5 Corner slab 6 First inner periphery 7 Second inner periphery 8 Outer periphery 9 Inner end 10 first outer end 11 second outer end 12 First Pillar 13 Second Pillar 17 First outer wall 18 Second Outer Wall 19 First fixing part 20 Second fixing part 21 First support part 22 Second support 24 Beam section 25 Diagonal beam 31 Tensile material 31A First Part 31B Second Part 31C Arc part 51 Inner precast section 52 Exterior precast section L straight line S area

Claims

1. a corner slab having a first inner periphery having an inner edge and a first outer edge, a second inner periphery having the inner edge and a second outer edge, and an outer periphery connecting the first outer edge and the second outer edge; Tendons extending inside the slab and to which tension is applied; a first anchorage for the tendon located near the first outer end of the slab; a second anchorage for the tendon located near the second outer end of the slab; and the outer peripheral edge is located outside a straight line connecting the first fixing portion and the second fixing portion, The area of ​​the slab between the straight line and the outer periphery is not supported by columns; The tendons extend through the area.

2. The apartment building according to claim 1 , wherein the tendons have an outwardly convex shape.

3. a first outer wall adjacent to the slab and disposed laterally of the first inner periphery; a second outer wall adjacent to the slab and disposed laterally of the second inner periphery; and The apartment building according to claim 1 , wherein the first fixing portion is located on the outside of the first exterior wall, and the second fixing portion is located on the outside of the second exterior wall.

4. a first pillar located near the first anchoring portion; a second pillar located near the second anchoring portion; a first support portion that protrudes outward from the first pillar and to which the first anchoring portion is attached; a second support portion that protrudes outward from the second pillar and to which the second anchor portion is attached; The apartment building of claim 1 .

5. a first pillar located near the first anchoring portion and to which the first anchoring portion is attached; a second post located near the second anchoring portion and to which the second anchoring portion is attached; The apartment building of claim 1 .

6. a horizontal cross section of the first pillar has an elongated shape in a direction parallel to the first inner periphery; The horizontal cross section of the second pillar has an elongated shape in a direction parallel to the second inner periphery. The apartment building according to claim 5.

7. 2. The apartment building described in claim 1, wherein the tension member comprises a first portion extending from the first fixing portion in a direction perpendicular to the first inner peripheral portion, a second portion extending from the second fixing portion in a direction perpendicular to the second inner peripheral portion, and an arc-shaped portion connecting the first portion and the second portion.

8. the tendon is located at an intermediate position between the first anchorage and the second anchorage and at a position lower than the first anchorage and the second anchorage; The dwelling unit according to claim 1 , wherein the slab is a flat slab that houses the tendons.

9. the tendon is located at an intermediate position between the first anchorage and the second anchorage and at a position lower than the first anchorage and the second anchorage; The apartment building according to claim 1 , wherein the slab has a beam-shaped portion extending on its underside along the path of the tendons and accommodating the tendons.

10. 2. The apartment building of claim 1, wherein the slab is divided into at least one inner precast section and at least one outer precast section located outside the at least one inner precast section and along the outer periphery.

11. a first pillar located near the first fixing portion and a second pillar located near the second fixing portion; The apartment building of claim 1 , wherein the slab has a beam connecting the first column and the second column.

12. 12. The apartment building of claim 11, wherein the slab is divided into at least one inner precast section and at least one outer precast section located outside the at least one inner precast section and along the outer periphery.

13. The apartment building according to any one of claims 1 to 12, wherein the apartment building is a tower apartment building.

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