Apartment building

Abstract

To provide an apartment building capable of reducing construction costs by suppressing increase in the number of columns even when a dimension in a beam direction increases.SOLUTION: An apartment building includes; an intermediate column 20 placed intermediate between a pair of ramen frames 10 in a beam direction; a shear wall 30 that extends between each of the pair of ramen frames 10 and the intermediate column 20 in the beam direction at least at the lowest level; a foundation beam 43 that connects bottoms of the pair of ramen frames 10 and the intermediate column 20 aligned in the beam direction being installed underground to extend in the beam direction; and a plurality of piles 42 extending downward from both ends of the foundation beam 43. The foundation beam 43 is provided at a center part side of the beam direction including below the intermediate column 20, and the foundation beam has an enlarged part 43a in which a beam depth T1 is formed larger than a beam depth T2 at both ends.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a multi-story apartment building having a plurality of floors.

Background Art

[0002] As a conventional apartment building, there is known a so-called slab-shaped house having a plurality of floors and a plurality of dwelling units formed in the girder row direction on each floor (see, for example, Patent Document 1).

[0003] In a conventional slab-shaped house, a pair of ramen frameworks are arranged to face each other on both sides in the direction between girders, and each is configured over the entire girder row direction, and a seismic wall extending in the direction between girders between the pair of ramen frameworks facing each other is provided.

[0004] A conventional slab-shaped house forms a foundation by providing footings at both ends in the direction between girders and arranging them below a pair of ramen frameworks, a foundation beam connecting the footings adjacent to each other in the direction between girders and in the girder row direction, and piles extending downward from the lower surface side of the footings.

[0005] In addition, when the slab-shaped house is formed with a large dimension in the direction between girders (for example, 10 m or more), an intermediate column is arranged on the central portion side in the direction between girders, and a ramen framework is configured along the direction between girders.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] In a plate-shaped housing where an intermediate column is arranged on the central portion side in the direction between beams, an intermediate footing is formed below the intermediate column, and an intermediate pile extending downward from the lower surface side of the intermediate footing is arranged. Therefore, in a plate-shaped housing where an intermediate column is arranged on the central portion side in the direction between beams, the number of piles increases, resulting in an increase in construction costs. Further, in a plate-shaped housing where an intermediate column is arranged on the central portion side in the direction between beams, since an intermediate pile is arranged between the piles arranged on both sides in the direction between beams, the axial force acting on the piles located on both end sides in the direction between beams becomes small, and a pulling force is likely to act on the piles. Therefore, it is necessary to increase the length of the piles, resulting in an increase in construction costs.

[0008] An object of the present invention is to provide a collective housing building capable of suppressing an increase in the number of piles and reducing construction costs even when the dimension in the direction between beams becomes large.

Means for Solving the Problems

[0009] The collective housing building according to the present invention is a collective housing building having a plurality of floors, and includes a pair of ramen frameworks arranged to face each other on both end sides in the direction between beams and each configured over the entire girder row direction, an intermediate column arranged on the intermediate portion side in the direction between beams between the pair of ramen frameworks, a seismic wall extending in the direction between beams between each of the pair of ramen frameworks and the intermediate column at least in the lowermost floor portion, a foundation beam provided to extend in the direction between beams underground and connecting the lower portions of each of the pair of ramen frameworks and the intermediate column arranged side by side in the direction between beams, and piles extending downward from both end sides of the foundation beam. The foundation beam is provided on the central portion side in the direction between beams including below the intermediate column, and has an enlarged portion formed with a larger beam deflection than the beam deflections on both end sides.

[0010] Further, in the collective housing building according to the present invention, preferably, the enlarged portion extends to both sides in the direction between beams with the central portion in the direction between beams of the foundation beam as the center, and the size in the direction between beams is one-half of the size in the direction between beams of the foundation beam.

[0011] In addition, the apartment building according to the present invention is preferably located on the lowest floor, and the seismic wall is disposed between the ramen structure and the intermediate column on the floor adjacent to the upper side of the seismic wall having the opening formed therein.

[0012] In addition, the apartment building according to the present invention is preferably disposed such that the opening is located at a position that is one-fourth of the size in the beam space direction from the end in the beam space direction of the foundation beam.

[0013] In addition, the apartment building according to the present invention is preferably provided, on the central portion side in the beam space direction between a pair of the ramen structures, with the intermediate columns that are paired in the beam space direction at a plurality of locations in the bay direction. Below one of the intermediate columns that are paired in the beam space direction, an intermediate pile that extends downward is provided, and the intermediate piles are alternately disposed below the intermediate column on one side in the beam space direction and below the intermediate column on the other side in the beam space direction toward the bay direction.

Advantages of the Invention

[0014] According to the present invention, the central portion in the beam space direction where the acting stress is the largest is supported by the enlarged portion where the beam deflection is largely formed, and the axial force acting on the intermediate column can be branched in the foundation beam having the enlarged portion and supported by the piles disposed on both sides in the beam space direction. Therefore, it is not necessary to dispose a pile below the intermediate column, and it is possible to reduce the construction cost.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0016] <First Embodiment> FIG. 1 shows the first embodiment of the present invention and is a schematic side view showing the structure of a condominium building.

[0017] The condominium building 1 of the present embodiment is a so-called slab house made of, for example, steel-reinforced concrete (SRC) or reinforced concrete (RC).

[0018] The condominium building 1 has a plurality of floors, and a plurality of housing units are arranged in the girder row direction (longitudinal direction) on each floor.

[0019] As shown in FIG. 1, the condominium building 1 is arranged so as to face each other on both ends in the direction between girders, and includes a pair of ramen frameworks 10 configured over the entire girder row direction, an intermediate column 20 arranged on the central part side in the direction between girders, a seismic wall 30 formed between each of the pair of ramen frameworks 10 in the first floor part and the intermediate column 20, and a foundation 40 formed in the ground part.

[0020] The ramen framework 10 is formed by rigidly joining a plurality of columns arranged at intervals in the girder row direction on both ends in the direction between girders and extending in the vertical direction, and a plurality of beams arranged at intervals in the vertical direction and connecting adjacent columns in the girder row direction.

[0021] The intermediate column 20 is arranged between the columns constituting each of the pair of ramen frameworks 10 arranged side by side in the direction between girders.

[0022] The seismic wall 30 is for improving the bearing capacity against the horizontal force acting on the apartment building 1, and is a reinforced concrete wall extending in the direction between the beams between each column of a pair of ramen frameworks 10 facing each other and the intermediate column 20. The seismic wall 30 is used as a partition wall separating adjacent housing units or as an outer wall. In this embodiment, the partition wall extending in the direction between the beams on the first floor is used as the seismic wall 30, and the partition wall extending in the direction between the beams on the floors above the second floor is composed of a dry wall made of gypsum board, glass wool, etc.

[0023] The foundation 40 has a footing 41 connected to the lower end of each column of a pair of ramen frameworks 10, a pile 42 formed to extend downward from the lower surface side of each footing 41, and a foundation beam 43 connecting the footings 41 adjacent to each other in the girder direction and the direction between the beams.

[0024] The footing 41 is formed to have dimensions in the girder direction and the direction between the beams larger than the width dimension of the foundation beam 43, and most of the load of the apartment building 1 acts thereon.

[0025] The pile 42 is a columnar member, the upper end thereof is connected to the lower surface of the footing 14, and by reaching the support layer with high ground strength on the lower end side, the apartment building 1 is supported by the support layer.

[0026] The foundation beam 43 is formed in a prismatic shape and extends in the girder direction or the direction between the beams. The foundation beam 43 extending in the direction between the beams has the lower end of the intermediate column 20 connected to the upper surface on the central portion side in the direction between the beams as shown in FIG. 1, and supports the intermediate column 20. The foundation beam 43 extending in the direction between the beams is provided on the central portion side in the direction between the beams including the lower part of the intermediate column 20, and has an enlarged portion 43a formed such that the beam bending moment T1 is larger than the beam bending moments T2 on both end sides.

[0027] The enlarged portion 43a has a pair of enlarged columns 43a1 that are arranged at intervals in the direction between the beams and extend vertically, and an enlarged beam 43a2 that connects between the pair of enlarged columns 43a1. The enlarged portion 43a extends on both sides in the direction between the beams with the central portion in the direction between the beams of the foundation beam 43 as the center, and has a size that is half of the size in the direction between the beams. The beam cross-section T1 of the enlarged portion 43a is formed to have a size that is 1.5 times or more and 2.0 times or less that of the beam cross-sections T2 on both end sides in the direction between the beams.

[0028] The apartment building 1 configured as described above is arranged on both end sides in the direction between the beams and is supported by the piles 42 driven into the support layer. Further, in the apartment building 1, the wall on the first floor part is used as the seismic wall 30, and by forming the enlarged portion 43a on the central portion side in the direction between the beams of the foundation beam 43, the axial force acting on the intermediate column 20 is dispersed in the foundation beam 43 and supported by the piles 42 on both end sides in the direction between the beams.

[0029] Thus, according to the apartment building of the present embodiment, there is provided an apartment building 1 having a plurality of floors, in which a pair of ramen frameworks 10 are arranged so as to face each other on both end sides in the direction between the beams, and are each configured over the entire direction of the bays, an intermediate column 20 is arranged on the intermediate portion side in the direction between the beams between the pair of ramen frameworks 10, a seismic wall 30 extending in the direction between the beams is provided between each of the pair of ramen frameworks 10 and the intermediate column 20 at least in the lowermost floor portion, a foundation beam 43 is provided so as to extend in the ground in the direction between the beams and connects the lower portions of each of the pair of ramen frameworks 10 and the intermediate column 20 arranged side by side in the direction between the beams, piles 42 extending downward from both end sides of the foundation beam 43, and the foundation beam 43 is provided on the central portion side in the direction between the beams including the lower part of the intermediate column 20 and has an enlarged portion 43a in which the beam cross-section T1 is formed larger than the beam cross-sections T2 on both end sides.

[0030] As a result, the central portion in the direction between the beams where the acting stress becomes the largest is supported by the enlarged portion 43a with a large beam cross-section, and the axial force acting on the intermediate column 20 can be branched in the foundation beam 43 having the enlarged portion 43a and supported by the piles 42 arranged on both sides in the direction between the beams. Therefore, it is not necessary to arrange piles below the intermediate column 20, and it becomes possible to reduce the construction cost. Further, compared with the case where the beam cross-section is increased over the entire length of the foundation beam, it is possible to reduce the amount of concrete used and reduce the man-hours required for construction work such as bracing, thereby reducing the construction cost.

[0031] Further, it is preferable that the enlarged portion 43a extends on both sides in the direction between the beams with the central portion in the direction between the beams of the foundation beam 43 as the center, and the size in the direction between the beams is half of the size in the direction between the beams of the foundation beam 43.

[0032] As a result, the portion where the beam cross-section changes can be positioned at the portion where the acting stress becomes the smallest, so that a large stress hardly acts on the portion where the beam cross-section changes, and it becomes possible to suppress breakage of the beam due to stress concentration.

[0033] <Second Embodiment> FIG. 2 shows a second embodiment of the present invention and is a schematic side view showing the structure of a condominium building. The same components as those in the above embodiment are denoted by the same reference numerals.

[0034] In the condominium building 1 of the present embodiment, an opening 31 such as an entrance is formed in the seismic wall 30 arranged on the first floor.

[0035] The opening 31 is formed between a pair of columns 31a arranged at intervals in the direction between the beams extending from the foundation beam 43 to the beam supporting the slab on the second floor. Further, the opening 31 is arranged at a position that is one-fourth of the size in the direction between the beams from the end in the direction between the beams of the foundation beam 43.

[0036] Further, a seismic wall 30 is formed between the ramen structure 10 on the second floor adjacent to the upper part of the seismic wall 30 in which the opening 31 is formed and the intermediate column 20.

[0037] The apartment building 1 configured as described above is supported by the piles 42, similarly to the first embodiment.

[0038] Thus, according to the apartment building of the present embodiment, similarly to the first embodiment, the axial force acting on the intermediate column 20 can be branched in the foundation beam 43 having the enlarged portion 43a and supported by the piles 42 arranged on both sides in the beam-to-beam direction. Therefore, it is not necessary to arrange piles below the intermediate column 20, and it is possible to reduce the construction cost.

[0039] Also, it is preferable that a seismic wall 30 is arranged between the ramen structure 10 on the second floor adjacent to the upper part of the seismic wall 30 in which the opening 31 is formed and located on the first floor and the intermediate column 20.

[0040] Thereby, the seismic wall 30 on the first floor in which the opening 31 is formed can be reinforced by the seismic wall 30 on the second floor adjacent thereto above, so that it is also possible to form the opening 31 in the wall where the seismic wall 30 on the first floor is arranged.

[0041] Also, it is preferable that the opening 31 is arranged at a position that is one-fourth of the longitudinal size from the end in the beam-to-beam direction of the foundation beam 43.

[0042] Thereby, the opening 31 is arranged at a position where the moment in the longitudinal direction of the foundation beam 43 is minimized, and it is possible to minimize the influence of the opening 31 on stress transmission.

[0043] <Third Embodiment> Figs. 3 to 5 show a third embodiment of the present invention. Fig. 3 is a schematic plan view showing the structure of an apartment building, Fig. 4 is a schematic plan view showing the arrangement of piles of the apartment building, and Fig. 5 is a schematic side view of the apartment building. In addition, the same components as those in the above embodiment are denoted by the same reference numerals.

[0044] As shown in Fig. 3, in the apartment building 1 of this embodiment, a plurality of dwelling units D are arranged in the bay direction on both end sides in the direction between beams, and a common corridor C extending in the bay direction is arranged on the central part side in the direction between beams.

[0045] As shown in Figs. 4 and 5, in the apartment building 1, intermediate columns 20 forming a pair in the direction between beams are arranged at a plurality of locations in the bay direction on the central part side in the direction between beams of a pair of ramen frameworks 10.

[0046] Further, in the apartment building 1, an intermediate pile 42a extending downward is provided below one of the intermediate columns 20 forming a pair in the direction between beams.

[0047] As shown in Figs. 5(a) and 5(b), the intermediate piles 42a are alternately arranged in order in the bay direction on one intermediate column 20 on one side in the direction between beams and the other intermediate column 20 on the other side in the direction between beams.

[0048] Seismic walls 30 are formed on each floor between each of the pair of ramen frameworks 10 and the intermediate column 20. Further, intermediate beams 21 are spanned between the intermediate columns 20 forming a pair arranged in the direction between beams on each floor.

[0049] Here, at least a part of the seismic wall 30 is arranged to overlap vertically with at least a part of an enlarged portion 43a of a foundation beam 43 extending in the direction between beams.

[0050] In the apartment building 1 configured as described above, since the intermediate piles 42a are alternately arranged in order in the girder row direction on one intermediate column 20 on one side in the bay direction and the other intermediate column 20 on the other side in the bay direction, when an intermediate pile 42a is not arranged below one intermediate column 20 on which a compressive force acts under a horizontal force of an earthquake, stress is transmitted to the intermediate piles 42a arranged below the other intermediate columns 20 adjacent in the bay direction and the girder row direction via the foundation beam. Thereby, it becomes possible to evenly apply a load over the entire foundation 40 without arranging piles on both sides of the intermediate columns 20 that form a pair in the bay direction.

[0051] Further, since at least a part of the seismic wall 30 overlaps at least a part of the enlarged portion 43a of the foundation beam 43 extending in the bay direction in the vertical direction, stress transmission becomes smooth when receiving a horizontal force of an earthquake.

[0052] Thus, according to the apartment building 1 of the present embodiment, similarly to the above-described embodiment, it is possible to branch the axial force acting on the intermediate column 20 and support it by the piles 42 arranged on both sides in the bay direction in the foundation beam 43 having the enlarged portion 43a. Therefore, it is not necessary to arrange a pile below the intermediate column 20, and it is possible to reduce the construction cost.

[0053] Also, in the central part side in the bay direction between the pair of ramen structures 10, intermediate columns 20 that form a pair in the bay direction are arranged at a plurality of locations in the girder row direction. Below one of the intermediate columns 20 that form a pair, an intermediate pile 42a extending downward is provided, and the intermediate piles 42a are alternately arranged in order in the girder row direction below the intermediate column 20 on one side in the bay direction and below the intermediate column 20 on the other side in the bay direction.

[0054] Thereby, when an intermediate pile 42a is not arranged below one intermediate column 20 on which a compressive force acts under a horizontal force of an earthquake, stress is transmitted to the intermediate piles 42a arranged below the other intermediate columns 20 adjacent in the bay direction and the girder row direction via the foundation beam, and it becomes possible to evenly apply a load over the entire foundation 40.

Explanation of Symbols

[0055] 1 Apartment building 10 Ramen structure 20 Intermediate column 30 Seismic wall 31 Opening 42 Pile 42a Intermediate pile 43 Foundation beam

Claims

1. An apartment building having a plurality of floors, comprising: A pair of ramen frameworks arranged to face each other at both ends in the beam interval direction and configured over the entire span direction; An intermediate column arranged on the intermediate part side in the beam interval direction between the pair of ramen frameworks; A seismic wall extending in the beam interval direction between each of the pair of ramen frameworks and the intermediate column, at least in the lowermost floor part; A foundation beam provided to extend in the ground in the beam interval direction and connecting the lower parts of each of the pair of ramen frameworks and the intermediate column arranged side by side in the beam interval direction; Piles extending downward from both ends of the foundation beam; and The foundation beam is provided on the central part side in the beam interval direction including the lower part of the intermediate column, and has an enlarged part formed with a larger beam deflection than the beam deflections at both ends. An apartment building.

2. The enlarged part: extends to both sides in the beam interval direction centering on the central part in the beam interval direction of the foundation beam; has a size in the beam interval direction that is one-half of the size of the foundation beam in the beam interval direction. The apartment building according to Claim 1.

3. A seismic wall is arranged between the ramen framework and the intermediate column of the floor adjacent above the seismic wall where an opening is formed and which is located on the lowermost floor. The apartment building according to Claim 1.

4. The opening is arranged at a position that is one-fourth of the size in the beam interval direction from the end in the beam interval direction of the foundation beam. The apartment building according to Claim 3.

5. A plurality of pairs of intermediate columns are arranged at multiple locations in the span direction on the central part side in the beam interval direction between the pair of ramen frameworks; An intermediate pile extending downward is provided below one of the pairs of intermediate columns; The intermediate piles are alternately arranged below the intermediate columns on one side in the beam interval direction and below the intermediate columns on the other side in the beam interval direction in the span direction. The apartment building according to Claim 1.

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