collective residential buildings

Abstract

To provide an apartment building capable of increasing an aspect ratio while suppressing increase in construction costs.SOLUTION: An apartment building 1 having multiple levels includes: a pair of ramen frames 10 that is constructed across a column direction and arranged to face each other at both ends of a beam direction; and at least one shear wall 20 that extends in the beam direction in each level to resist horizontal force in the beam direction. The number of shear walls 20 placed at each level is less than or equal to the number of shear walls 20 in a level to which each level is adjacent and which is at a lower side of each level. The number of shear walls 20 placed on a top floor is smaller than the number of shear walls 20 placed at a bottom level.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a multi-storey apartment building. [Background technology]

[0002] BACKGROUND ART A known conventional apartment building is a so-called slab-type house, which has a plurality of floors and a plurality of dwelling units formed in the girder direction on each floor (see, for example, Patent Document 1).

[0003] A conventional slab-type house comprises a pair of rigid frame structures arranged opposite each other on either side of the beam direction, each extending across the entire length of the girder, and an earthquake-resistant wall extending between the pair of opposing rigid frame structures in the beam direction and separating adjacent dwelling units on each floor.

[0004] In conventional slab-type houses, the foundation is constructed by forming footings that are installed at both ends in the span direction and placed below a pair of rigid frame structures, foundation beams that connect adjacent footings in the span direction and the longitudinal direction, and piles that extend downward from the underside of the footings.

[0005] In conventional slab-type houses, when a horizontal earthquake force acts in the beam direction, a compressive force acts on one pile in the beam direction, and a pull-out force acts on the other pile. In conventional slab-type houses, all of the partition walls separating adjacent units on each floor are earthquake-resistant walls, so the pull-out force acting on the piles is large. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-59297 Summary of the Invention [Problem to be solved by the invention]

[0007] In conventional slab-type houses, if the aspect ratio, which is the ratio of the height to the span, exceeds a certain value, the pull-out force acting on the piles when the horizontal force of an earthquake acts in the span direction becomes excessive, so the height is usually limited to a value at which the aspect ratio is equal to or less than a certain value. Also, in conventional slab-type houses, it is possible to increase the aspect ratio beyond the certain value by adjusting the length of the piles to allow for the pull-out force acting, but this would increase construction costs.

[0008] An object of the present invention is to provide an apartment building that can suppress increases in construction costs and can have a large aspect ratio. [Means for solving the problem]

[0009] The apartment building of the present invention is an apartment building having multiple floors, and comprises a pair of rigid frame structures arranged facing each other at both ends in the beam direction, each structure extending along the entire length of the girder, and at least one beam-direction strength-bearing section extending in the beam direction on each floor to resist horizontal forces in the beam direction, wherein the number of beam-direction strength-bearing sections arranged on each floor is less than or equal to the number of beam-direction strength-bearing sections arranged on the adjacent floor below, and the number of beam-direction strength-bearing sections arranged on the top floor is less than the number of beam-direction strength-bearing sections arranged on the bottom floor.

[0010] In addition, in the apartment building of the present invention, preferably, on a floor where the number of beam-direction strength-bearing sections is less than the number of beam-direction strength-bearing sections on the adjacent floor below, at least some of the beam-direction strength-bearing sections are positioned in a position that is not vertically continuous with the beam-direction strength-bearing sections positioned on the adjacent floor below.

[0011] In addition, in the apartment building according to the present invention, the beam-to-beam strength-bearing sections on each floor are preferably arranged in positions in the girder direction that are symmetrical with respect to the center of the girder direction.

[0012] In the apartment building according to the present invention, the beam-to-beam load-bearing portion is preferably a seismic wall or a beam. [Effects of the Invention]

[0013] According to the present invention, it is possible to suppress the pull-out force acting on the piles when a horizontal earthquake force acts in the span direction, thereby suppressing increases in construction costs and making it possible to increase the aspect ratio, which is the ratio of the height direction size to the span direction size, beyond a predetermined value. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic side view showing the structure of an apartment building according to a first embodiment of the present invention. [Figure 2] 1 is a schematic front view showing the arrangement of earthquake-resistant walls of an apartment building according to a first embodiment of the present invention. FIG. [Figure 3] 1 is a schematic plan view showing the arrangement of earthquake-resistant walls of an apartment building according to a first embodiment of the present invention. [Figure 4] FIG. 10 is a schematic plan view showing the arrangement of earthquake-resistant walls of an apartment building according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] First Embodiment Figures 1 to 3 show a first embodiment of the present invention. Figure 1 is a schematic side view showing the structure of an apartment building, Figure 2 is a schematic front view showing the arrangement of earthquake-resistant walls in the apartment building, and Figure 3 is a schematic plan view showing the arrangement of earthquake-resistant walls in the apartment building.

[0016] The apartment building 1 of this embodiment is, for example, a so-called slab-type house made of steel-framed reinforced concrete (SRC) or reinforced concrete (RC).

[0017] The apartment building 1 has multiple floors, and multiple dwelling units are arranged in the girder direction (longitudinal direction) on each floor.

[0018] As shown in Figure 1, the apartment building 1 comprises a pair of rigid frame structures 10 arranged opposite each other at both ends in the span direction and each extending across the entire length of the girder, a plurality of earthquake-resistant walls 20 on each floor that extend in the span direction between the pair of rigid frame structures 10 to act as span direction strength-bearing sections that resist horizontal forces in the span direction, and a foundation 30 formed underground.

[0019] The rigid frame structure 10 is formed by rigidly joining a plurality of columns, each extending in the vertical direction and spaced apart in the longitudinal direction, at both ends in the span direction, and a plurality of beams, each spaced apart in the vertical direction and connecting adjacent columns in the longitudinal direction.

[0020] The earthquake-resistant wall 20 is a reinforced concrete wall that extends between the columns of a pair of opposing rigid frame structures 10 in the beam direction and improves the resistance to horizontal forces acting on the apartment building 1. The earthquake-resistant wall 20 is used as a partition wall separating adjacent dwelling units or as an exterior wall.

[0021] As shown in Figures 2 and 3, the number of earthquake-resistant walls 20 installed on each story is equal to or less than the number of earthquake-resistant walls 20 installed on the adjacent story below, and the number of earthquake-resistant walls 20 installed on the top story is less than the number of earthquake-resistant walls 20 installed on the bottom story. On stories where the number of earthquake-resistant walls 20 is fewer than the number of earthquake-resistant walls 20 on the adjacent story below, at least some of the earthquake-resistant walls 20 are installed in positions that are not vertically continuous with the earthquake-resistant walls 20 installed on the adjacent story below. Here, partition walls on which earthquake-resistant walls 20 are not formed are constructed of drywall 40 made of gypsum board, glass wool, etc.

[0022] Specifically, on the upper floors (13th to 15th floors in FIG. 2) of the apartment building 1 shown in FIG. 3(a), there are four earthquake-resistant walls 20 and three drywalls 40. On the middle floors (7th to 12th floors in FIG. 2) of the apartment building 1 shown in FIG. 3(b), there are five earthquake-resistant walls 20 and two drywalls 40. On the lower floors (1st to 6th floors in FIG. 2) of the apartment building 1 shown in FIG. 3(c), there are six earthquake-resistant walls 20 and one drywall 40.

[0023] Furthermore, the plurality of earthquake-resistant walls 20 on each story are arranged in positions in the girder direction that are symmetrical with respect to the center of the girder direction.

[0024] The foundation 30 has footings 31 connected to the lower ends of each column of a pair of rigid frame structures 10, piles 32 formed to extend downward from the underside of each footing 31, and foundation beams 33 connecting adjacent footings 31 in the longitudinal direction and the span direction.

[0025] The footing 31 is formed so that its dimensions in the longitudinal direction and the span direction are larger than the width dimensions of the foundation beams 33, and most of the load of the apartment building 1 acts on it.

[0026] The pile 32 is a cylindrical member, the upper end of which is connected to the underside of the footing 31, and the lower end of which reaches the supporting layer with high ground strength, thereby supporting the apartment building 1 on the supporting layer.

[0027] The foundation beam 33 is formed in a rectangular column shape and extends in the longitudinal direction or the span direction.

[0028] The apartment building 1 constructed as described above is supported by piles 32 that are placed on both ends in the beam direction and driven into the supporting layer. Furthermore, in the apartment building 1, the number of earthquake-resistant walls 20 placed on each floor is equal to or less than the number of earthquake-resistant walls 20 placed on the adjacent floor below, and the number of earthquake-resistant walls 20 placed on the top floor is less than the number of earthquake-resistant walls 20 placed on the bottom floor, so when a horizontal earthquake force acts in the beam direction, the pull-out force acting on each rigid frame frame 10 is small.

[0029] Thus, according to the apartment building of this embodiment, the apartment building 1 has multiple floors and is equipped with a pair of rigid frame structures 10 arranged facing each other at both ends in the beam direction and each constructed over the entire length of the girder direction, and at least one earthquake-resistant wall 20 on each floor that extends in the beam direction to resist horizontal forces in the beam direction, and the number of earthquake-resistant walls 20 arranged on each floor is less than or equal to the number of earthquake-resistant walls 20 arranged on the adjacent floor below, and the number of earthquake-resistant walls 20 arranged on the top floor is less than the number of earthquake-resistant walls 20 arranged on the bottom floor.

[0030] This makes it possible to suppress the pull-out force acting on pile 32 when a horizontal earthquake force acts in the span direction, thereby suppressing increases in construction costs and making it possible to increase the aspect ratio, which is the ratio of the height direction size to the span direction size, beyond a specified value.

[0031] Furthermore, it is preferable that at least some of the earthquake-resistant walls 20 on a floor where the number of earthquake-resistant walls 20 is less than the number of earthquake-resistant walls 20 on the adjacent floor below be positioned in a position that is not vertically continuous with the earthquake-resistant walls 20 positioned on the adjacent floor below.

[0032] This makes it possible to distribute the pull-out force acting on each of the pair of rigid frame structures 10 to each of the multiple columns that make up the rigid frame structure 10, thereby making it possible to suppress the concentration of pull-out force on a specific pile.

[0033] Furthermore, it is preferable that the earthquake-resistant walls 20 on each story are arranged in positions in the girder direction that are symmetrical with respect to the center of the girder direction.

[0034] This allows the pull-out force acting on each of the pair of rigid frame structures 10 to be applied uniformly over the entire length of the girder.

[0035] Second Embodiment 4 is a schematic plan view showing the arrangement of earthquake-resistant walls of an apartment building, illustrating a second embodiment of the present invention. Components similar to those in the previous embodiment are designated by the same reference numerals.

[0036] As shown in FIG. 4, the apartment building 1 of this embodiment has, between a pair of rigid frame structures 10, a seismic wall 20 extending in the span direction and a seismic wall 21 extending in the girder direction.

[0037] As in the first embodiment, the number of earthquake-resistant walls 20 arranged on each story is equal to or less than the number of earthquake-resistant walls 20 arranged on the adjacent story below, and the number of earthquake-resistant walls 20 arranged on the top story is less than the number of earthquake-resistant walls 20 arranged on the bottom story. When the number of earthquake-resistant walls 20 arranged on each story is smaller than the number of earthquake-resistant walls 20 arranged on the adjacent story below, at least some of the earthquake-resistant walls 20 are arranged in positions different from the earthquake-resistant walls 20 arranged on the adjacent story below.

[0038] Specifically, the upper floors of the apartment building 1 shown in Figure 4(a) have four earthquake-resistant walls 20 that connect each of a pair of rigid frame structures 10 to an earthquake-resistant wall 21 extending in the girder direction at both ends in the girder direction, and one earthquake-resistant wall 20 at the center in the girder direction, one end of which is connected to one of the rigid frame structures 10 and the other end of which is connected to the earthquake-resistant wall 21. Also, the middle floors of the apartment building 1 shown in Figure 4(b) have four earthquake-resistant walls 20 that connect each of the pair of rigid frame structures 10 to the earthquake-resistant wall 21 extending in the girder direction at both ends in the girder direction, and five earthquake-resistant walls 20 that have one end of which is connected to one of the rigid frame structures 10 and the other end of which is connected to the earthquake-resistant wall 21 at the center in the girder direction. Furthermore, the lower floors of the apartment building 1 shown in Figure 4(c) have four earthquake-resistant walls 20 that connect each of the pair of rigid frame structures 10 to an earthquake-resistant wall 21 extending in the longitudinal direction at both ends of the girder direction, and five earthquake-resistant walls 20 that are connected at one end to one of the rigid frame structures 10 and at the other end to an earthquake-resistant wall 21 at the center of the longitudinal direction.

[0039] The apartment building 1 configured as described above is supported by piles 32 that are arranged on both ends in the beam direction and driven into the supporting layer, similar to the first embodiment. Furthermore, in the apartment building 1, the number of earthquake-resistant walls 20 arranged on each floor is equal to or less than the number of earthquake-resistant walls 20 arranged on the adjacent floor below, and the number of earthquake-resistant walls 20 arranged on the top floor is less than the number of earthquake-resistant walls 20 arranged on the bottom floor, so that when a horizontal earthquake force acts in the beam direction, the pull-out force acting on each rigid frame frame 10 is small.

[0040] Thus, according to the apartment building of this embodiment, as with the first embodiment, it is possible to suppress the pull-out force acting on the piles when the horizontal force of an earthquake acts in the beam direction, thereby suppressing increases in construction costs and making it possible to increase the aspect ratio, which is the ratio of the height direction size to the beam direction size, beyond a specified value.

[0041] Furthermore, it is preferable that at least some of the earthquake-resistant walls 20 on a floor where the number of earthquake-resistant walls 20 is less than the number of earthquake-resistant walls 20 on the adjacent floor below be positioned in a position that is not vertically continuous with the earthquake-resistant walls 20 positioned on the adjacent floor below.

[0042] This makes it possible to distribute the pull-out force acting on each of the pair of rigid frame structures 10 to each of the multiple columns that make up the rigid frame structure 10, thereby making it possible to suppress the concentration of pull-out force on a specific pile.

[0043] In the above embodiment, the shear wall 20 is shown as the span-direction strength-bearing part that resists horizontal forces in the span direction, but it is not limited to the shear wall 20. The span-direction strength-bearing part may be a beam that extends in the span direction between the pair of rigid frame frames 10, as long as it is a structure that resists horizontal forces in the span direction. In other words, it is preferable that the span-direction strength-bearing part is a shear wall 20 or a beam. [Explanation of symbols]

[0044] 1 Apartment building 10. Rahmen frame 20,21 Earthquake-resistant walls

Claims

1. A multi-storey apartment building, A pair of rigid frame structures arranged to face each other at both ends in the span direction, each structure extending over the entire girder direction; and at least one beam-direction strength-bearing section extending in the beam direction on each floor to resist horizontal forces in the beam direction; the number of the beam-direction strength-bearing sections arranged on each story is equal to or less than the number of the beam-direction strength-bearing sections arranged on the adjacent story below, the number of the beam-direction strength-bearing sections arranged on the top floor is less than the number of the beam-direction strength-bearing sections arranged on the bottom floor, At least some of the beam-direction strength-bearing sections of a story where the number of beam-direction strength-bearing sections is less than the number of beam-direction strength-bearing sections of the story adjacent below are arranged in positions that are not vertically continuous with the beam-direction strength-bearing sections arranged in the story adjacent below. Apartment building.

2. The beam-to-beam strength-bearing sections on each floor are arranged in positions in the longitudinal direction that are symmetrical with respect to the center of the longitudinal direction. The apartment building of claim 1.

3. The beam-to-beam strength-bearing portion is a shear wall or a beam. The apartment building of claim 1.

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