JP3803951B2 - Flat slab structure building - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is made of reinforced concrete or steel-framed reinforced concrete, and is composed of flat slabs and columns without large beams (beam type), and an unbonded steel brace is placed on a floor that requires rigidity and strength against horizontal forces such as earthquakes. Belongs to the technical field of flat slab structure building.
[0002]
[Prior art]
With regard to recent apartment houses, there is a demand for a dwelling unit type that can design a free floor plan or can change the floor plan in the future in response to changes accompanying family growth. By the way, in the conventional housing complex where pillars, beams and walls are arranged in the same cross-sectional shape from the lower floor to the upper floor in the same cross-sectional shape, the design of the floor plan of the dwelling units is restricted, and free floor plans are available at each floor and each dwelling unit. There was a problem in designing. In addition, the presence of the beams causes interference with the interior, and the interior member or the furniture must take measures such as “notch” where the interior members and furniture interfere with the beam, resulting in inconvenience in production efficiency and design design.
[0003]
Therefore, conventionally, by separating the structural frame (skeleton) from the interior and equipment (infill), the degree of freedom in planning the building (for example, one-floor free space design freedom) and future renewability and compatibility are obtained. For this purpose, research and development of a flat slab structure without beams is underway. Since the flat slab structure building is a simple frame type without a beam type, it is easy to simplify the formwork, industrialize and standardize the structural members, and to shorten the construction period and cost.
[0004]
As such prior art, for example, in (1) No. 3-3722 (utility model registration No. 1879477) gazette, it is a non-beam plate structure composed of columns and floor slabs. A seismic isolation structure is disclosed in which a wall is installed and a seismic isolation device is installed directly below the floor slab on the lowest floor.
[0005]
(2) Japanese Patent Publication No. 7-103639 (Patent No. 2063043) discloses a reinforcing bar arrangement structure and a reinforcing bar arrangement method for a reinforced concrete thick-walled concrete slab having a beam function that constitutes a flat slab structure building. Has been.
[0006]
Further, (3) Japanese Patent Laid-Open No. 64-107059 (Patent No. 2532482) discloses a structure in which a flat slab is joined to the column by supporting the column directly with a seismic isolation device, and the flat slab is prestressed concrete. A building structure configured as a product is disclosed.
[0007]
Furthermore, the present applicant also disclosed in (4) Japanese Patent Application Laid-Open No. 10-306614, a seismic isolation device is installed immediately below the megastructure column, and a flat slab is provided between the megastructure columns or horizontally with the flat slab. It discloses a seismic isolation structure for buildings, which is composed of a megastructure girder on a floor that requires rigidity and proof against force.
[0008]
[Problems to be solved by the present invention]
The conventional technologies (1) and (3) above have no foundation beam and are simply a structure in which a flat slab is joined to a column. Therefore, it cannot be applied to a high-rise building, and a low-rise building of about 2 to 3 floors at most. It is considered as a feasible range.
[0009]
In the prior art (2), the bar arrangement structure of the thick-walled concrete slab is clear, but it is unclear what type of flat slab structure is constructed using the slab.
[0010]
Since the prior art (4) has a structure in which multi-story shear walls are arranged in the span direction, it is not possible to expect a free floor plan design and renewability at each floor and each dwelling unit.
[0011]
It is an object of the present invention to design a free-floor layout or to change the floor plan in the future according to the growth of the family, in particular, columns, beams and walls on the lower floor, the upper floor and the plane of each floor. However, a different cross-section column is adopted, the design of the floor plan of the dwelling unit is free, and it is possible to design a free floor plan at each floor and each dwelling unit, and it is a beam that interferes with interior members and furniture (beam type ) And a flat slab structure building that is advantageous in terms of production efficiency and design design.
[0012]
The next object of the present invention is to provide a new flat slab structure building capable of expanding the application area from a low-rise building to a high-rise building.
[0013]
A further object of the present invention is to achieve the separation of the structural frame (skeleton) from the interior and equipment (infill), the degree of freedom in planning the floor plan of the building (for example, one-floor free space design freedom) and future updates. It is a flat slab structure without a beam type that can be obtained, and because it is a simple frame type without a beam type, it is easy to simplify the formwork, industrialize and standardize the structural members, The aim is to provide a flat slab structure building that can achieve a short construction period and cost reduction.
[0014]
An ultimate object of the present invention is to provide a flat slab structure building in which the position of a structural wall, which is a structure on each floor of the building, can be freely set within a certain range.
[0015]
[Means for Solving the Problems]
As a means for solving the above-described problems, a flat slab structure building according to the invention of claim 1 is:
In a flat slab structure building consisting of a flat slab 1 and a pillar 2 without a large beam,
The pillar 2 constructed on the foundation beam 3 includes a pillar 2A having a cross-section with a part 5 of the structural wall, a pillar 2B having a simple cross-section not provided, or a wall pillar 5A composed of only a part of the structural wall. Each of them is configured as a variable section column that is continuous on the upper and lower floors, flat columns 2A and 2B are arranged in the direction of the construction , and the door walls 5 and 5A are not continuous, and the walls 5 and 5A in the door direction are arranged. The floor of each floor is configured as a flat slab 1 that does not have a beam shape, and an unbonded steel brace 7 is provided on the floor that requires rigidity and strength against horizontal forces such as earthquakes. The flat slab 1 is arranged to include a virtual beam region 8 having the same thickness as the slab around the column .
[0016]
The flat slab structure building according to the invention of claim 2
In a flat slab structure building consisting of a flat slab 1 and a pillar 2 without a large beam,
The foundation beam 3 is supported by the seismic isolation device 4, and the pillar 2 constructed on the foundation beam 3 includes a pillar 2A having a cross section with a part 5 of the structural wall and a pillar 2B having a simple section without attachment, or The wall pillar 5A consisting only of a part of the structural wall is configured as a variable section pillar connected on the upper and lower floors, flat pillars 2A, 2B are arranged in the direction of the construction, and the door walls 5 and 5A are continuous. In addition, the arrangement of the walls 5 and 5A in the door-to-door direction can be freely configured on the upper and lower floors, and the floor on each floor is configured as a flat flat slab 1 having no beam shape, and is rigid against horizontal forces such as earthquakes. An unbonded steel brace is arranged on the floor requiring proof stress, and the flat slab 1 includes a virtual beam region 8 having the same thickness as the slab around the column 2 .
[0018]
Embodiments and Examples of the Invention
Embodiment of the flat slab structure building which concerns on invention of Claims 1-3 was shown notionally in FIG.
[0019]
The flat slab structure building according to the first and second aspects of the present invention is implemented by being constituted by a multi-layer flat slab 1 having a plate shape without a large beam (beam type) and a pillar 2 supporting these.
[0020]
In the case of FIG. 1, the foundation beam 3 is supported by a seismic isolation device 4. However, seismic isolation devices are not necessary for low-rise buildings of about 3 to 6 stories.
[0021]
The column 2 constructed on the foundation beam 3 includes a column 2A having a cross-section with a part 5 of the structural wall, a column 2B having a simple cross-section not provided, or a wall column 5A composed of only a part of the structural wall. As illustrated in FIGS. 2 to 4, each is configured as a variable cross-sectional column that is continuous on the upper and lower floors. The types of the changed cross-section columns are also implemented in the forms as shown in FIGS.
[0022]
The floor of each floor is basically constructed as a flat slab 1 that does not have a beam shape and can withstand long-term load and weight, and it is an unbonded steel brace only on floors that require rigidity and strength against horizontal forces such as earthquakes. 7 is arranged. Specifically, the cross-sectional structure of the unbonded steel brace 7 has a configuration in which the flat steel 11 is stiffened through the unbond layer 12 by the concrete coating 10 as illustrated in FIG. 6A, or the concrete coating 10 as illustrated in FIG. 6B. Thus, the steel rod 13 is stiffened via the unbonded layer 12 or a configuration in which a plurality of steel rods 13 are arranged in parallel as illustrated in FIG. 6C. The steel bar 13 includes a reinforcing bar or a PC steel bar. Therefore, as illustrated in FIGS. 8A to 8C, the steel bar 13 has a configuration in which two or three steel bars 14 are bundled, and a plurality of bundles of the steel bars 14 are arranged in parallel. A structure stiffened by the coating 10 is also implemented.
[0023]
The flat slab structure building according to the present invention includes a pillar 2A having a cross section provided with a part 5 of the structural wall, a pillar 2B having a simple cross section not provided, or a wall pillar 5A including only a part of a structural wall, The unbonded steel brace 7 forms a kind of ramen frame to withstand horizontal force.
[0024]
The boundary walls are not continuous, and the layout of the walls in the boundary direction is free on the upper and lower floors. Therefore, the degree of freedom of the floor plan is high. Because there are no beams in the construction surface and the direction of the doorway wall, the height of the interior members can be made uniform, and it is unnecessary to take measures such as cutting out parts where interior members, joinery, sash, furniture, etc. interfere with the beams. It is preferable for improvement of production efficiency and design design.
[0025]
The flat slab 1 is an unbonded slab or a void slab, and may be a simple reinforced concrete structure or a prestressed concrete structure. The introduction of the prestress may be an unbonded structure, a bonded structure, or an afterbonded structure.
[0026]
Each flat slab 1 in the flat slab structure building according to the present invention includes a virtual beam region 8 in which only the reinforcing bars are increased in the range of the same thickness as the slab (250 to 350 mm) around the column 2 (FIG. 7). it is also not good to be carried out in).
[0027]
Other features of the present invention are as follows.
(1) The structural wall does not need to be continuous in the doorway direction. The positions of the walls may be different on the upper and lower floors and on the same floor.
(2) The length of the structural wall can be designed freely.
(3) It is possible to dispose the core of the wall on the upper and lower floors, and the length of the wall can be set freely.
[0028]
[Effects of the present invention]
Since the flat slab structure building according to the first and second aspects of the invention can freely set the arrangement of the walls and the cross-sectional shape of the columns, the degree of freedom of space utilization can be maximized. That is, the position and length of the wall can be planned in accordance with the floor plan, and the position of the window (opening) can be set freely. For this reason, not only the degree of freedom of the floor plan at the time of new construction, but also flexibility in responding to future changes in usage and housing allocation, and the long-term utility value of the building is improved.
[0029]
Moreover, it can be applied not only to low-rise buildings but also to high-rise buildings.
[Brief description of the drawings]
FIG. 1 is an elevation view conceptually showing an embodiment of a flat slab structure building according to the present invention.
FIG. 2 is a bird's-eye view showing features of a flat slab structure building according to the present invention.
FIG. 3 is a plan view of the (n + 1) th floor in FIG.
4 is a plan view of the nth floor in FIG. 2;
5A to 5C are cross-sectional views showing types of variable cross-section columns.
6A and 6B are cross-sectional views showing the structure of an unbonded steel brace.
FIG. 7 is an explanatory view showing a connecting portion between a flat slab and a pillar.
8A to 8C are cross-sectional views showing different configurations of unbonded steel braces.
[Explanation of symbols]
1 Flat slab 2 Column 5 Part of structural wall 5A Wall column 7 Unbonded steel brace 4 Seismic isolation device 8 Virtual beam area

Claims (2)

In a flat slab structure building composed of flat slabs (1) and columns (2) without large beams,
The column (2) constructed on the foundation beam (3) has a cross-sectional column (2A) with a part of the structural wall (5) and a simple cross-sectional column (2B) with no structural wall or a structural wall The wall pillar (5A) consisting of only a part is configured as a variable section pillar connected on the upper and lower floors respectively, and flat pillars (2A) and (2B) are arranged in the direction of the construction , and the door wall (5) and (5A) is not continuous, and the arrangement of the walls (5) and (5A) in the border direction is free on the upper and lower floors, and the floors on each floor are flat flat slabs with no beam type ( 1), an unbonded steel brace (7) is placed on the floor that requires rigidity and proof against horizontal forces such as earthquakes, and the flat slab (1) is a virtual beam of the same thickness as the slab around the column. Flat slab structure building, characterized in that it includes region (8) . In a flat slab structure building composed of flat slabs (1) and columns (2) without large beams,
The foundation beam (3) is supported by the seismic isolation device (4), and the column (2) constructed on the foundation beam (3) is a column with a section (2A) with a part (5) of the structural wall. ) and pillars simple cross section which is not attached (2B), or a structural portion pilasters composed only of the wall (5A) and is configured as a variable cross-section pillars continuous with floors of the upper and lower, respectively, in the Plane direction flat pillar ( 2A) and (2B) are arranged, the border walls (5) and (5A) are not continuous, and the arrangement of the walls (5) and (5A) in the border direction is free on the upper and lower floors. The floor of each floor is configured as a flat flat slab (1) that does not have a beam shape, and an unbonded steel brace is placed on the floor that requires rigidity and proof against horizontal forces such as earthquakes , and the flat slab (1) It is characterized in that it comprises a region of virtual beams having the same thickness and the slab around the column, flat slab structure Thing.

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