Wall-type reinforced concrete structure

Abstract

To provide a wall type reinforced concrete structure suppressed in deformation of a wall or a wall pillar and a slab.SOLUTION: A public facility 10 as a wall type reinforced concrete structure is constituted by including: reinforced concrete RC walls 12 having a pair of curved parts 34 curved in a curve shape in plan view and arranged so as to face each other; and a reinforced concrete slab 14 supported by the pair of curved parts.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wall-type reinforced concrete structure. [Background technology]

[0002] Patent Document 1 discloses a wall-type reinforced concrete structure that is composed of wall panels and slabs, and in which the wall panels and floor panels are integrally joined by pouring high-strength concrete into the joints between the wall panels and the slabs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-220517 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the wall-type reinforced concrete structure disclosed in Patent Document 1, the wall panels are formed as flat plates extending in the vertical direction of the structure. Therefore, if the slab span is long, the wall panels may collapse toward the inside of the structure, and the slab may bend downward. Furthermore, bending stress may increase at the joints between the wall panels and the slab. For these reasons, there is room for improvement in suppressing deformation of the wall or wall columns and the slab.

[0005] In consideration of the above, the present invention aims to provide a wall-type reinforced concrete structure that can suppress deformation of the wall or wall columns and the slab. [Means for solving the problem]

[0006] The first embodiment of a wall-type reinforced concrete structure is composed of a reinforced concrete wall or wall column that is curved in a curved shape when viewed in plan and has a pair of curved portions arranged opposite each other, and a reinforced concrete slab supported on the pair of curved portions.

[0007] In the first aspect of the wall-type reinforced concrete structure, the wall or wall column is curved in a curved shape in plan view and has a pair of curved sections arranged opposite each other. This improves the bending rigidity compared to a wall or wall column that is straight in plan view. This makes it possible to prevent the wall or wall column from collapsing inward of the structure and the slab from deflecting downward.

[0008] The second embodiment of the wall-type reinforced concrete structure is the wall-type reinforced concrete structure of the first embodiment, in which one of the pair of curved portions forms an inside corner portion curved toward the inside of the structure, and the other forms an outside corner portion curved toward the outside of the structure.

[0009] In the second embodiment of the wall-type reinforced concrete structure, one end of the slab, which is installed across a pair of opposing curved sections, is joined to the inside corner and the other end to the outside corner, which prevents the wall or wall columns from collapsing inward and the slab from bending downward.

[0010] The third embodiment of the wall-type reinforced concrete structure is a wall-type reinforced concrete structure of the first or second embodiment, in which the curved portion is formed with a different curvature on the inside of the structure than on the outside of the structure, thereby making the wall thicker than other parts of the wall or wall column.

[0011] In the third aspect of the wall-type reinforced concrete structure, the curved section is formed with a thick wall by forming the curvature on the inside of the structure and the curvature on the outside of the structure to be different. This makes it possible to suppress the deflection of the slab and improve the bending rigidity of the wall or wall column compared to a curved section formed with the same wall thickness as the rest of the wall or wall column. As a result, for example, even if the slab has a long span, it is possible to suppress the collapse of the wall or wall column toward the inside of the structure and the deflection of the slab toward the bottom of the structure. [Effects of the Invention]

[0012] As described above, the wall-type reinforced concrete structure according to the present invention has the excellent effect of suppressing deformation of the wall or wall columns and the slab. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a plan view of a wall-type reinforced concrete structure according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional elevation view of a curved portion according to the first embodiment. [Figure 3A] FIG. 2 is an iso-deformation diagram of the wall-type reinforced concrete structure according to the first embodiment. [Figure 3B] FIG. [Figure 4] FIG. 10 is a plan view of a wall-type reinforced concrete structure according to a second embodiment. [Figure 5] FIG. 10 is a cross-sectional elevation view of a curved portion according to a modified example. [Figure 6] FIG. 10 is a cross-sectional elevation view of a structure according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0014] (First embodiment) The wall-type reinforced concrete structure according to the first embodiment will be described below with reference to the drawings. Note that arrow L shown in Fig. 1 indicates the length direction of the structure, arrow W indicates the width direction of the structure, and arrow H indicates the up-down direction of the structure.

[0015] Fig. 1 shows a public facility 10 as a wall-type reinforced concrete structure according to the first embodiment. The public facility 10 is a facility where, for example, technical materials, cultural and artistic materials, etc. are exhibited. The public facility 10 is a wall-type structure that combines RC walls 12 as reinforced concrete walls with a reinforced concrete slab 14.

[0016] In the following, the wall-type reinforced concrete structure will be described as a public facility 10, but this is not limited to this. The wall-type reinforced concrete structure of this embodiment may also be constructed for other purposes, such as a structure in an industrial facility such as a factory, or a structure in an educational facility.

[0017] The public facility 10 is equipped with an exhibition room 16, and one end of the structure in the width direction is constructed facing the outside (OT) of the site of the public facility 10. The other end of the structure in the width direction of the public facility 10 is the inside (IN) side of the site of the public facility 10.

[0018] The RC wall 12A on the IN side of the site has an inside corner 36 that curves toward the interior of the exhibition room 16 (inside the structure). Additionally, the RC wall 12B on the OT side of the site has an outside corner 38 that curves toward the exterior of the exhibition room 16 (outside the structure). Therefore, the inside corner 36 and outside corner 38 of the RC wall 12 form a curved portion 34, which can improve bending rigidity compared to a wall that is formed straight in plan view.

[0019] A slab 14 is installed above the structure (ceiling side) of the exhibition room 16, spanning the RC wall 12A on the IN side of the site and the RC wall 12B on the OT side of the site, and extends along the length of the structure. The slab 14 is a flat slab and is supported by the RC wall 12, which has improved bending rigidity compared to a wall formed linearly in plan view, and therefore can suppress deflection DF (see Figure 2) of the slab 14 toward the downward side of the structure. Furthermore, the bending rigidity of the RC wall 12 is improved by providing a curved section 34, which prevents the exhibition room 16 from collapsing toward the interior (inside the structure) or exterior (outside the structure) of the structure due to the load acting from the slab 14 on the RC wall 12.

[0020] The slab 14 is provided with cables 42 that introduce prestress across the fixed portion between the end 36A of the inside corner 36 in the length direction of the structure and the fixed portion between the end 38A of the opposite outside corner 38 in the length direction of the structure. The cables 42 are provided along a direction DR2 that is inclined in plan view with respect to the direction DR1 in which the inside corner 36 and the outside corner 38 face each other. This improves the bending rigidity of the slab 14, and further suppresses deflection DF (see FIG. 2) of the slab 14 downward in the structure.

[0021] In the slab 14 provided with cables 42 for introducing prestress, a substantially elliptical opening 44 is formed in the area sandwiched between the cables 42 provided on both ends 36A, 38A of the inside corner 36 and the outside corner 38 in the length direction of the structure. By providing the cables 42 for introducing prestress, the bending rigidity of the slab 14 can be ensured even when the openings 44 are provided. This allows the weight of the slab 14 to be reduced and also makes it possible to prevent the slab 14 from bending downward in the structure.

[0022] A skylight 46 is provided in the opening 44. This allows external light, such as sunlight, to be directly introduced into the exhibition room 16. This improves the lighting inside the exhibition room 16 and also reduces the increase in power consumption related to lighting within the exhibition room 16. Note that while the description has been given assuming that only one opening 44 is provided, this is not limiting, and for example, multiple openings may be provided in the slab at a certain distance so as not to interfere with the cables 42.

[0023] (Action and effect) Next, the operation and effects of this embodiment will be described.

[0024] According to the public facility 10 as a wall-type reinforced concrete structure of this embodiment, the RC wall 12 is provided with a pair of opposing curved sections 34. Specifically, the RC wall 12 on the IN side of the site has an inside corner 36 that curves toward the interior of the exhibition room 16 (inside the structure). Furthermore, the RC wall 12B on the OT side of the site has an outside corner 38 that curves toward the exterior of the exhibition room 16 (outside the structure).

[0025] FIG. 2 shows an elevational cross-section of a curved section 34 with a long-span slab 14 as an example. Also in FIG. 2, the deformation (collapse) of the RC wall 12 toward the inside of the structure and the deflection DF of the slab 14 toward the bottom of the structure due to the slab 14 being fixed to the RC wall 12 are shown by dashed lines. Also, FIG. 6 shows, as a comparison, an elevational cross-section of a structure 50 in which a long-span slab 14 is fixed to a wall 52 without a curved section 34. Similarly to FIG. 2, FIG. 6 also shows the deformation of the wall 52 toward the inside of the structure and the deflection DF of the slab 14 toward the bottom of the structure by dashed lines. As can be seen from a comparison of FIGS. 2 and 6, the inside corners 36 and outside corners 38 of the RC wall 12 can improve bending rigidity compared to a wall that is linear in plan view. This can suppress the collapse of the RC wall 12 toward the interior of the exhibition room 16 (inside the structure) and the deflection DF of the slab 14 toward the bottom of the structure.

[0026] 3A and 3B show the results of calculations performed by structural analysis on the deformation of the slab 14 in a structure 56 having curved sections 34 in the RC walls 12 and in a structure 50 having flat-plate-shaped walls 52. In the structure 56 having curved sections 34 in the RC walls 12, the central portion of the slab 14 in the width direction of the structure is significantly deflected (the color of the iso-deformation curves is darker) in the structure 50 having flat-plate-shaped walls 52, whereas the deflection DF in the central portion of the slab 14 in the width direction of the structure is suppressed (the color of the iso-deformation curves is lighter). From the above, by improving the bending rigidity of the inside corners 36 and outside corners 38, it is possible to suppress the deflection DF of the slab 14 downward in the structure, even when the span of the slab 14 is long.

[0027] Furthermore, in the public facility 10 according to this embodiment, the slab 14 is provided with cables 42 that apply prestress across the fixing portion between the end 36A of the inside corner 36 in the longitudinal direction of the structure and the fixing portion between the end 38A of the outside corner 38 in the longitudinal direction of the structure, which faces the inside corner 36. This improves the bending rigidity of the slab 14. As a result, for example, even if the span of the slab 14 is long, it is possible to suppress the deflection DF of the slab 14 downward.

[0028] Furthermore, in the public facility 10 according to this embodiment, the cables 42 for introducing prestress, which are provided in the slab 14 across the fixed portion with the inside corner 36 and the fixed portion with the outside corner 38, are provided along a direction DR2 that is inclined in plan view with respect to the direction DR1 in which the inside corner 36 and the outside corner 38 face each other. This improves the bending rigidity of the curved portion 34 of the slab 14 on the ends 36A, 38A side in the length direction of the structure, and further suppresses deflection DF downward of the structure.

[0029] As described above, the public facility 10 according to this embodiment can suppress deformation of the RC walls 12 and the slabs 14.

[0030] Furthermore, in the public facility 10 according to this embodiment, the slab 14, on which the cables 42 that introduce prestress are provided, has an opening 44 in the area sandwiched between the cables 42. This ensures the bending rigidity of the slab 14, suppresses downward deflection DF of the structure, and reduces the weight of the slab 14. Furthermore, a skylight 46 can be formed in the opening 44, allowing external light, such as sunlight, to enter through the skylight 46, improving the lighting inside the exhibition room 16.

[0031] Furthermore, with the public facility 10 according to this embodiment, it is possible to extend the span of the slab 14 in a wall-type structure, which satisfies structural performance and contributes greatly to design. Furthermore, by adjusting the position and number of curved sections 34 depending on the purpose inside the structure, the degree of freedom in space utilization and design can be increased. Furthermore, by providing curved sections 34 in the public facility 10, it is possible to construct a building with a beautiful design and an aesthetically pleasing appearance.

[0032] (Second embodiment) Next, a public facility 60 as a wall-type reinforced concrete structure according to a second embodiment will be described with reference to Fig. 4. Note that the same components as those in the first embodiment described above will be assigned the same numbers and their description will be omitted.

[0033] In the public facility 60 according to this embodiment, the inside corner 64 and outside corner 66 that make up the curved portion 62 are formed with different curvatures on the inside and outside of the exhibition room 16, so that the wall thickness is thicker than the wall thickness of other portions of the RC wall 12. Specifically, the inside corner 64 has a greater curvature on the exhibition room 16 side (inside the structure) than the curvature on the IN side of the premises (outside the structure), so that the wall thickness is thicker than the wall thickness of other portions of the RC wall 12A. Furthermore, the outside corner 66 has a greater curvature on the OT side of the premises (outside the structure) than the curvature on the exhibition room 16 side (inside the structure), so that the wall thickness is thicker than the wall thickness of other portions of the RC wall 12B.

[0034] In the public facility 60 according to this embodiment, the curved portion 62 is formed with different curvatures on the inside and outside of the exhibition room 16, so that the wall thickness is thicker than the wall thickness of other portions of the RC wall 12. This improves the bending rigidity compared to a curved portion (not shown) in which the RC wall 12 has a uniform wall thickness, and makes it possible to suppress the deflection DF of the slab 14 downward in the structure. As a result, even if the span of the slab 14 is long or the slab 14 is thick, it is possible to suppress the collapse of the RC wall 12 toward the exhibition room 16 and the deflection DF of the slab 14 downward in the structure.

[0035] (Variation) Next, a modified example of the wall-type reinforced concrete structure 70 according to this embodiment will be described with reference to Figure 5. Note that the same components as those in the first embodiment described above will be assigned the same numbers and their description will be omitted.

[0036] In the wall-type reinforced concrete structure 70 according to this modification, a haunch 74 is provided at the portion where the slab 72 is fixed to the RC wall 12A. The haunch 74 extends downwards of the structure and has a cross section cut along the vertical direction of the structure that is larger than the cross section of the other portions of the slab 72. This improves the bending rigidity of the portion where the slab 72 is fixed to the RC wall 12A. Note that, in the following, the haunch 74 is described as extending downwards of the slab 72, but this is not limiting, and the haunch may be formed in another form, such as extending upwards of the slab.

[0037] As an example, Figure 5 shows an elevational cross-sectional view of a curved section 76 equipped with a long-span slab 72, and also shows a diagram of the bending moment MS acting on the slab 72. A bending moment MS is generated at each part of the slab 72 due to its own weight, and the magnitude of this bending moment MS reaches a maximum MX at the fixed part of the slab 72 to the RC wall 12A, where the haunch part 74 is provided. In the wall-type reinforced concrete structure 70 according to this modification, the haunch part 74 is provided at the fixed part of the slab 72 to the RC wall 12A. This allows the bending rigidity of the haunch part 74 of the slab 14 to be improved, and the slab 72 can withstand a large bending moment MS.

[0038] In this embodiment, the slab 14 of the public facility 10, which is a wall-type reinforced concrete structure, is described as being supported by the RC wall 12, but this is not limited to this, and for example, the slab may be supported by wall columns arranged continuously.

[0039] Furthermore, although it has been described here that only one pair of curved sections 34 (inner corner section 36 and outer corner section 38) are arranged opposite each other in the public facility 10, this is not limiting, and the curved sections may be arranged, for example, such that an inner corner section and an outer corner section are arranged opposite each other on each opposing wall or wall column in a wall-type reinforced concrete structure whose overall shape is formed into an approximately polygonal shape in a plan view. [Explanation of symbols]

[0040] 10 Public facilities (wall-type reinforced concrete structures) 12 RC wall (reinforced concrete wall) 12A RC wall (reinforced concrete wall) 12B RC wall (reinforced concrete wall) 14 Slabs 34 Curved section 36 Inside corner 38 Corner 60 Public facilities (reinforced concrete wall structures) 62 Curved section 64 Inside corner 66 Corner 70 Wall-type reinforced concrete structures 72 Slabs 76 Curved section

Claims

1. A pair of reinforced concrete walls or wall columns arranged continuously opposite each other, the upper and lower edges of which are curved in a curved shape in plan view and have curved portions; A reinforced concrete slab having an end fixed to the top side surface of the curved portion arranged opposite to the slab; The invention comprises: A wall-type reinforced concrete structure in which both ends of the pair of reinforced concrete walls or wall columns arranged continuously are not joined to each other.

2. One of the pair of curved portions has an inside corner portion curved toward the inside of the structure, and the other has an outside corner portion curved toward the outside of the structure, The slab is provided with a cable for introducing prestress across a first fixing portion between the end of the inside corner portion in the length direction of the structure and a second fixing portion between the end of the outside corner portion in the length direction of the structure opposite to the first fixing portion. The wall-type reinforced concrete structure according to claim 1.

3. In the slab, openings are formed in the inside corner portion, the outside corner portion, and the area surrounded by the cable.

3. The wall-type reinforced concrete structure according to claim 2.

4. A wall-type reinforced concrete structure as described in any one of claims 1 to 3, wherein the curved portion is formed with a curvature that is different on the inside of the structure from the curvature on the outside of the structure, thereby forming a wall thickness that is thicker than other parts of the wall or wall column.

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