Building structure

Abstract

To provide a building structure capable of holding a prescribed compression strength, exhibiting high earthquake performance, and reducing a construction cost.SOLUTION: A building structure 1 having an outer wall 5 composed of a plurality of layers in a thickness direction is configured such that an outermost layer 10 has a center region 11 and a peripheral region 12, an innermost layer 30 has an end region 31 and the other region 32, the design reference strength of concrete of the center region 11 is higher than that of concrete of the peripheral region 12, and the design reference strength of concrete of the end region 31 is higher than that of concrete of the other region 32.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to architectural structures made of reinforced concrete or steel-reinforced concrete, and in particular to architectural structures that need to be shielded from radiation in radiation utilization facilities. [Background technology]

[0002] Architectural structures related to radiation facilities must be designed so that even if a flying object such as an aircraft (hereinafter collectively referred to as "airborne object") strikes them, the equipment installed inside will not be affected by the flying object penetrating through them. As a countermeasure in such cases, it is necessary to make the structure stronger by thickening the exterior walls (earthquake-resistant walls) of the target architectural structure. However, the wall thickness of the large span section will be about 3m, which will increase the overall weight of the building structure and raise the center of gravity, increasing the overturning moment and reducing earthquake resistance.On the other hand, if the wall thickness is reduced by increasing the strength of the concrete used, not only will construction costs be high, but there is also the risk of thermal cracks occurring, which will affect the shielding performance.

[0003] In consideration of similar issues, a protective hill is installed around the entire perimeter of the building structure to be protected (nuclear power plant building), and this protective hill is set higher than the building structure itself, and a protective structure is installed that is strong enough to withstand collisions with flying objects, etc. (Patent Document 1).

[0004] The applicant has also proposed an extremely thick wall structure in which the average shear stress against horizontal forces during an earthquake is equal to or less than the short-term allowable shear stress of the concrete to be poured, a crack dispersion zone is provided in the surface layer of the extremely thick wall made of a material with a larger Young's modulus than concrete, and the internal region sandwiched between the surface layers is made of unreinforced concrete (Patent Document 2). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2010-95884 A [Patent Document 2] JP 2007-192010 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, conventional protective structures require the construction of protective hills in addition to the building structure, which increases the cost of construction. Also, since it is difficult to predict the complete behavior of flying objects, there has been a demand for the construction of high-strength building structures with excellent earthquake resistance.

[0007] Incidentally, conventional extra-thick wall structures are characterized by the fact that, under certain conditions, the necessary structural strength can be ensured even if the cross-sectional area ratio of wall reinforcement is less than 0.25%, and that when the concrete is extremely thick, the effect of wall reinforcement on structural performance such as rigidity and inherent shear strength is small, so that the necessary strength can be obtained without reinforcement. With this in mind, a major feature of these structures is that they have crack dispersion zones in the surface layer and the internal area is constructed from unreinforced concrete; however, they do not address technology related to the impact load of flying objects.

[0008] The present invention has been made to solve the above problems, and has an objective of providing an architectural structure made of reinforced concrete or steel-reinforced concrete (hereinafter sometimes referred to as "RC, etc. structure") that retains a specified compressive strength, has excellent earthquake resistance performance, and enables reduction in construction costs. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides an architectural structure made of reinforced concrete or steel-reinforced concrete, wherein at least one exterior wall has multiple layers that are cast in the thickness direction, and the outermost layer has, in an elevational view, a central region which is a predetermined range around the center of gravity, and a peripheral region other than the central region, and the innermost layer has, in an elevational view, end region which includes at least one of a predetermined range from the upper and lower ends and a predetermined range from the left and right ends, and other region other than the end region, wherein the design standard strength of the concrete in the central region is higher than the design standard strength of the concrete in the peripheral region, and the design standard strength of the concrete in the end region is higher than the design standard strength of the concrete in the other region.

[0010] The present invention also relates to an architectural structure made of reinforced concrete or steel-reinforced concrete, in which at least one exterior wall has a plurality of layers in the thickness direction, and the outermost layer has, in an elevational view, a central region that is a region within a predetermined range from the periphery of the center of gravity, and a peripheral region other than the central region, and the innermost layer has, in an elevational view, a corner region that is a region within a predetermined range from at least one corner (or multiple corners), and other regions other than the corner region, and the design standard strength of the concrete in the central region is greater than or equal to the peripheral region. Ko The present invention provides an architectural structure characterized in that the design standard strength of the concrete in the corner area is higher than the design standard strength of the concrete in the other areas.

[0011] In addition, in the above-mentioned architectural structure, the exterior wall has a rectangular shape when viewed from the elevation, and the central region is a core region formed between a section having a width dimension of 1 / 4 based on the left end of the exterior wall and a section having a width dimension of 1 / 4 based on the right end of the exterior wall (particularly, preferably, a region formed between a section having a height dimension of 1 / 4 based on the upper end of the exterior wall and a section having a height dimension of 1 / 4 based on the lower end of the exterior wall and a region where the core region overlaps), which is preferable in terms of rational design to achieve a specified strength and reduce construction costs (the peripheral region in this case is a square ring shape or a rectangle excluding the left and right end regions).

[0012] In addition, in the above-mentioned architectural structure, when the exterior wall is rectangular in the elevational view and includes a specified range of areas from the top and bottom ends, the core region includes the region formed between the top end of the exterior wall and a portion that is 1 / 8 of the height from the top end, as well as the region formed between the bottom end of the exterior wall and a portion that is 1 / 8 of the height from the bottom end, and when the exterior wall includes a specified range of areas from the left and right ends, the core region includes the region formed between the left end of the exterior wall and a portion that is 1 / 8 of the width from the left end, as well as the region formed between the right end of the exterior wall and a portion that is 1 / 8 of the width from the right end, which is preferable in terms of rational design.

[0013] In addition, in the above-mentioned architectural structure, the exterior wall has a rectangular shape when viewed from the elevation, and the corner area is preferably a core area consisting of the four corner areas where the area formed between the upper end of the exterior wall and a portion that is 1 / 8 of the height from the upper end, the area formed between the lower end of the exterior wall and a portion that is 1 / 8 of the height from the lower end (upper and lower end areas), the area formed between the left end of the exterior wall and a portion that is 1 / 8 of the width from the left end, and the area formed between the right end of the exterior wall and a portion that is 1 / 8 of the width from the right end (left and right end areas).

[0014] The central region, the end region and the corner region preferably include at least the core region, and may be a wide range including the above-mentioned regions.

[0015] In addition, the upper end of the exterior wall refers to the boundary between the exterior wall and the roof, and the lower end refers to the bottom surface of the exterior wall. In addition, it is preferable for a rational design that the thicknesses of the outermost layer and the innermost layer are each 1 / 3 or more of the outer wall thickness.

[0016] In addition, in the above-mentioned building structure, the central region, the end regions, and the corner regions have a design standard strength of 48 (N / mm 2 It is preferable to use high strength concrete of at least 100%.

[0017] The above-mentioned architectural structures are assumed to be reinforced concrete structures or similar, but the basic structure can be appropriately determined depending on the structure to which it is applied. The architectural structure can be used in various types of structures that have exterior walls, and the shape, dimensions, etc. of each exterior wall can be appropriately determined depending on the structure to which it is applied. However, the architectural structure is particularly suitable for use in extremely thick walls with an exterior wall total thickness (total thickness of each layer) of 3 m or more.

[0018] Furthermore, in cases where the target architectural structure has multiple exterior walls, it is sufficient that the method be applied to at least one of the exterior walls, but it is of course also possible to apply the method to multiple exterior walls (which may include all exterior walls).

[0019] Furthermore, the outer wall may be formed to have at least two layers in the thickness direction, and the layer thickness etc. can be appropriately determined depending on the structure to which it is applied. Here, the outermost layer of an exterior wall having multiple layers is the layer located closest to the outside of the structure, and the innermost layer is the layer located closest to the interior side (inner wall side). Moreover, each region is formed by pouring concrete of a different design standard strength (which may be the same for regions of different stories) in each story of the exterior wall.

[0020] In addition, the outermost layer of the exterior wall must have at least a central region and a peripheral region other than the central region, but there are no other conditions regarding the central region and the peripheral region other than the relationship between the design standard strength of the concrete. In addition, the innermost layer must have each end region or corner region and other regions other than the end region, but there are no other conditions regarding the end region or corner region and the other regions other than the magnitude relationship of the design standard strength of the concrete.

[0021] The relative relationship in the design standard strength of concrete in each region of an exterior wall is an issue within the same story, and there are no restrictions on the relative relationship in the design standard strength of concrete between different stories. Furthermore, there are no other requirements for the concrete used other than the design standard strength. Furthermore, the above-mentioned building structure may have exterior walls constructed by pouring concrete on-site, or may have exterior walls constructed using wall bodies manufactured in a factory by a precast construction method.

[0022] Generally, when designing reinforced concrete structures, it is assumed that a flying object will collide with the center of an exterior wall. In that case, a large amount of compressive force will be generated at the corners or edges of the innermost surface of the exterior wall, and a large amount of compressive force will be generated in the center of the outermost surface of the exterior wall. Research (using FEM analysis [analysis using the finite element method]) has revealed that the concrete in the areas where these compressive forces act will collapse.

[0023] Based on the above findings, in the above-mentioned architectural structure, the exterior walls are made to have a multi-layer structure in the thickness direction, and concrete with a higher design standard strength (hereinafter, the design standard strength of concrete may be simply referred to as "concrete strength") is used in areas of the exterior walls which will be subjected to great compressive forces in the event of a flying object collision, compared to other areas. By appropriately determining the concrete strength in the vertical and thickness directions in specified areas of the exterior walls, it is possible to ensure a specified compressive strength and prevent the concrete from collapsing, while also ensuring seismic resistance and reducing construction costs. Effect of the Invention

[0024] According to the present invention, it is possible to provide a structure such as a reinforced concrete structure that maintains a predetermined compressive strength, has excellent earthquake resistance performance, and enables reduction in construction costs. [Brief description of the drawings]

[0025] [Figure 1] FIG. 11 is an explanatory diagram relating to an FEM analysis when an impact load is applied to the exterior wall of a hypothetical architectural structure, where (a) is an explanatory diagram showing the preconditions for the assumed architectural structure, (b) is a contour diagram of the compressive strain at the innermost surface of the exterior wall upon impact, and (c) is a contour diagram of the compressive strain at the outermost surface of the exterior wall upon impact. [Diagram 2] FIG. 1 is a perspective view of an architectural structure of the present invention. [Diagram 3] XX cross-sectional view of FIG. 2. [Figure 4] 4A is a view taken in the direction of an arrow Y in FIG. 3, and FIG. 4B is a view taken in the direction of an arrow Z in FIG. [Diagram 5] 5A and 5B are diagrams showing another embodiment of the architectural structure of the present invention, in which (a) is a horizontal cross-sectional view corresponding to FIG. 3, and (b) is a view seen in the direction of the arrow W in FIG. 5A. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, with reference to the drawings, an embodiment of the architectural structure 1 of the present invention (hereinafter referred to as the "architectural structure") will be described in detail, taking as an example a building for housing a fuel handling facility of a nuclear power plant. In order to clarify the basic concept of the present invention, the architectural structure 1 has a rectangular parallelepiped shape, which is the simplest shape, and its structure and dimensions are merely illustrative (the drawings are different from the actual scale because the thickness of the exterior wall 5 is exaggerated for the sake of explanation). In addition, in the explanation based on the drawings, the same elements are given the same symbols, and duplicate explanations will be omitted.

[0027] (The concept behind this building structure) The inventors have studied buildings having shielding walls or shielding slabs for shielding radiation in radiation utilization facilities such as nuclear power plant fuel handling buildings and main steam pipe rooms, nuclear power generation facilities, PET (positron emission tomography) facilities, RI (radioisotope) facilities, nuclear fuel fabrication facilities, and nuclear fuel reprocessing facilities. As a result, it has become clear that for walls in which the average shear stress required for seismic design is equal to or less than the short-term allowable shear stress of the members, the effect of wall reinforcement on the rigidity and shear strength is small, and the required structural performance can be obtained. Therefore, the strain distribution against the impact load when a flying object collides with the outer wall of such a building structure was obtained by FEM analysis.

[0028] The FEM analysis targeted a rectangular parallelepiped building structure 90 with a length of 34 m, a height of 31 m, a depth of 26 m, and a wall thickness of 3 m. It was assumed that a flying object 95 (a large commercial aircraft) collided horizontally with one of the large exterior walls 91, and the compressive strain of each part of the exterior wall 91 was calculated through simulation (Figure 1(a)).

[0029] The flying object 95 was set to collide with the center of the exterior wall 91 in the width direction, at a point 18 m above the lower end in the height direction. Other analytical conditions were the assumed compressive strength of the concrete, which was the design standard strength of 48 (N / mm 2) and took into consideration an appropriate dynamic increase rate, the specific gravity of reinforced concrete was set at 2.6, and the cross-sectional area ratio of the wall reinforcement was set at 1.0%. The impact load used in the simulation was a load-time history assumed based on the maximum takeoff weight and flight speed of the flying object.

[0030] As a result of the FEM analysis, it became clear that a large compressive force acts on the outermost surface 91a of the exterior wall 91 near the center of gravity (near the area formed between the areas that are 1 / 4 of the width from the left and right ends of the exterior wall 91), resulting in compressive strain (Figure 1(c)).

[0031] In addition, it was revealed that a large compressive force acts on the innermost side surface 91b in the areas near the left and right ends (the areas formed between the left and right ends of the outer wall 91 and the parts that are 1 / 8 of the width from the left and right ends, respectively) and in the areas near the upper and lower edges (the areas formed between the upper and lower ends of the outer wall 91 and the parts that are 1 / 8 of the height from the upper and lower ends, respectively), causing compressive strain (Figure 1(b)) (the above areas include the areas near the four upper and lower corners on the left and right sides of the outer wall 91 (the areas formed between the upper and lower ends of the outer wall 91 and 1 / 8 of the height from the upper and lower ends, respectively, and the areas including the areas near the right and left ends of the outer wall 91 and the parts that are 1 / 8 of the length from the right and left ends, respectively), and it was found that a particularly large compressive strain was generated in those areas).

[0032] FIG. 1(b) and FIG. 1(c) are schematic diagrams of compressive strain, with the fine dots indicating areas where compressive strain of 0.20% or more and less than 0.46% has occurred, and the shaded areas indicating areas where compressive strain of 0.46% or more has occurred (however, since the figures have been simplified for the sake of explanation, without being precise, in the event of any doubt, the above explanation shall take precedence).

[0033] In addition, regarding the above FEM analysis, the assumed compressive strength of concrete is 48 (N / mm2 ), however, it was confirmed that similar analysis results were obtained even when the design standard strength was equal to or greater than the above.

[0034] Based on the above findings, in this building structure, the exterior walls are made of a multi-layered structure in the thickness direction, and high-strength concrete is used in the areas of the exterior walls that will be subjected to great compressive forces in the event of a flying object collision, compared to other areas, so that the concrete strength is differentiated in the vertical and thickness directions on the target surfaces of the exterior walls.

[0035] It is known that the measured value of the compressive strength of concrete in RC and other structures varies depending on the quality of the concrete itself, the curing conditions after construction, the test conditions, the age of the concrete, as well as the dimensions of the components and the casting location. RC and other structures are also unique in that they are large-scale, one-off products constructed under different design conditions and on-site conditions (region, location, season, weather, etc.). For this reason, various strength test methods, including non-destructive testing methods, have been developed, but it is extremely difficult to determine the actual strength of the concrete used in a constructed building structure, and this is considered common technical knowledge among those skilled in the art.

[0036] In view of the above circumstances, in constructing a concrete structure, in order to specify the compressive strength of concrete, the design standard strength of concrete determined by the designer according to the required performance and quality of the architectural structure is used, and the construction is carried out so that the specified design standard strength is realized by strictly carrying out the specified quality control and construction management. In this way, the design standard strength is consistent with the compressive strength, and is commonly used in practice as the most important standard value for specifying the strength of concrete used in RC and other structures, so the design standard strength is also used when specifying the strength of the concrete in this invention.

[0037] In addition, this building structure is based on a design concept based on the design standards under the current Building Standards Act, and does not guarantee that damage to the target building structure will always be prevented when excessive bearing pressure is applied, which may occur in the event of an unexpected external force such as an aircraft collision.

[0038] (Configuration of this building structure) Next, the building structure 1 will be described. This building structure 1 is constructed on a foundation (not shown) with a certain level of earthquake resistance ensured, and inside it is provided a spent fuel pit 2 for storing the spent nuclear fuel used in the reactor core (Fig. 2). The spent fuel pit 2 (the part below the ground line GL in the figure) is buried underground.

[0039] The building structure 1 has exterior walls 5-8 erected on all four sides and a roof portion 9 (flat roof) above them. The exterior walls 5-8 include large-area exterior walls 5, 6 of the same structure facing each other, and small-area exterior walls 7, 8 of the same structure facing each other.

[0040] In the following, in this embodiment, it is assumed that only the large-area exterior walls 5, 6 adopt the configuration of the present invention, and an explanation will be given of only one of the exterior walls, 5 (hereinafter, the exterior wall adopting the configuration of the present invention may be referred to as the "present exterior wall"). Although this building structure 1 is a reinforced concrete structure, it is characterized by differences in the design standard strength of concrete in each part of the exterior walls 5 and 6, and the various reinforcing bars arranged in each part are not significantly different from those in general building structures. Therefore, only matters related to the characteristic parts will be explained below.

[0041] The exterior wall 5 is composed of an outermost layer 10 facing the external space, an innermost layer 30 facing the internal space of the architectural structure 1, and an intermediate layer 20 between the outermost layer 10 and the innermost layer 30, and has a three-layer structure characterized by a design standard strength in the thickness direction (FIG. 3). In this embodiment, the layer thicknesses of the outermost layer 10, the intermediate layer 20, and the innermost layer 30 are each 1 / 3 of the total thickness of the exterior wall 5. However, depending on the case, the layer thickness of the intermediate layer 20 may be shorter than the layer thickness of the outermost layer 10 or the innermost layer 30.

[0042] As shown in Figure 4(a), the outermost layer 10 has, when viewed from above, a central region 11 which is a rectangular region around the center of gravity, and a peripheral region 12 which is a quadrangular ring shape other than the central region 11 (for ease of explanation, the central region 11 is shown as a shaded area (similar to Figure 5(b))). The central region 11 is formed by an overlapping region of a region formed between a section having a width dimension that is 1 / 4 of the left end of the exterior wall 5 and a section having a width dimension that is 1 / 4 of the right end, and a section having a height dimension that is 1 / 4 of the top end of the exterior wall 5 (the boundary with the roof part 9) and a section having a height dimension that is 1 / 4 of the bottom end (note that in Figure 4 (and also in Figure 5 below), the width dimension of the exterior wall 5 is shown as D and the height dimension is shown as H).

[0043] As shown in Fig. 4(b), the innermost layer 30 has end regions 31, which are regions near the top, bottom, left and right edges in an elevational view, and other regions 32 (inner layer central region) other than the end regions 31 (for convenience of explanation, the end regions 31 are shown as shaded regions). The end regions 31 include regions formed between the upper and lower ends of the main outer wall 5 and parts that are 1 / 8 the height from the upper and lower ends, and regions formed between the right and left ends of the main outer wall 5 and parts that are 1 / 8 the length from the right and left ends, and are formed in a quadrangular ring shape. The other regions 32 are formed in a rectangular shape.

[0044] In addition, the end region portion 31 includes four corner region portions 31a at the upper and lower left and right corners in the innermost layer 30 (the upper end portion and the lower end portion, regions formed between the upper end portion and the lower end portion and having a height dimension of 1 / 8 of the height dimension of each of the upper end portion and the lower end portion, and the right end portion and the left end portion, four rectangular regions where regions formed from portions having a length dimension of 1 / 8 of the length dimension of each of the right end portion and the left end portion overlap).

[0045] And for the concrete in the central region portion 11 of the outermost layer 10, concrete having a higher design standard strength is used compared to the concrete in the peripheral region portion 12. In this embodiment, it is assumed that the design standard strength of the concrete in the central region portion 11 is 48 (N / mm 2 ), and the design standard strength of the concrete in the peripheral region portion 12 is 27 (N / mm 2 ).

[0046] Also, in the innermost layer 30, for the concrete in the end region portion 31, concrete having a higher design standard strength is used compared to the concrete in the other region portion 32. In this embodiment, it is assumed that the design standard strength of the concrete in the end region portion 31 is 48 (N / mm 2 ), and the design standard strength of the concrete in the other region portion 32 is 27 (N / mm 2 ). Note that for the entire intermediate layer 20, concrete having the same design standard strength as that of the peripheral region portion 12 of the outermost layer 10 and the other region portion 32 of the innermost layer 30 is used.

[0047] (Construction method of the main outer wall in this building structure) The construction method of the main outer wall 5 in this building structure 1 will be briefly described. This building structure 1, which is a fuel handling facility of a nuclear power plant, is a large-scale structure. When constructing the main outer wall 5, concrete placement is repeated a plurality of times in the height direction at predetermined heights.

[0048] The method of pouring concrete in the thickness direction of the exterior wall 5 at each height takes into consideration the effects of thermal expansion caused by the generation of heat of hydration of concrete, etc., and first pours the concrete in the central region 11 of the outermost layer 10 and the end region 31 of the innermost layer 30, where the concrete has high strength (it does not matter which direction the concrete is poured in for the central region 11 of the outermost layer 10 and the end region 31 of the innermost layer 30).

[0049] After a prescribed curing period, concrete is poured into the peripheral area 12 of the outermost layer 10 and the other area 32 of the innermost layer 30, which have low concrete strength (it does not matter whether the concrete is poured in the peripheral area 12 of the outermost layer 10 or in the other area 32 of the innermost layer 30). Furthermore, after a predetermined curing period, the concrete for the intermediate layer 20 is poured.

[0050] (Effects of this architectural structure) According to the building structure 1, the exterior walls 5, 6 have a multi-layer structure (a three-layer structure in this embodiment) in the thickness direction, and are configured so that the design standard strength of the concrete in the areas of the exterior walls where a great compressive force acts upon collision with a flying object (the central area 11 of the outermost layer 10 and the end area 31 of the innermost layer 30) is higher than the design standard strength of the concrete in the peripheral area 12 of the outermost layer 10 and the other areas 32 of the innermost layer 30. In this way, by appropriately determining the concrete strength in the vertical and thickness directions in specified areas of the exterior walls 5, 6, it is possible to ensure a specified compressive strength and prevent the concrete from collapsing, while also ensuring earthquake resistance and reducing construction costs.

[0051] While one example of a preferred embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and appropriate design changes can be made to each element without departing from the spirit of the present invention. There are no limitations on the type or form of the architectural structure, and the most suitable components can be adopted for each component of the present invention. In addition, the above invention-specific matters specify the minimum necessary components, and other components may be added as long as they do not impede the effects of the invention.

[0052] In addition, in this embodiment, the main exterior wall 5 of the architectural structure 1 has been described as having three layers. However, the main exterior wall 5' may have a structure of an architectural structure 1' (FIG. 5(a)) having two layers, an outermost layer 10' and an innermost layer 30 (the structure of the innermost layer 30 is the same as in the above embodiment), without providing an intermediate layer. Moreover, the structure may be one in which two or more intermediate layers (not shown) having different concrete strengths are provided between the outermost layer and the innermost layer.

[0053] Furthermore, as shown in FIG. 5(b), the outermost layer 10' may have a structure in which the central region 11' is formed over the entire height direction, rather than being a core region having a certain distance in the left-right and up-down directions (symbol 12' indicates a peripheral region). Also, the innermost layer may reinforce only the corner areas.

[0054] Furthermore, if the joint (connection) between the main exterior wall formed in multiple layers as described above and another exterior wall joined to the main exterior wall (hereinafter, the main exterior wall 5' and exterior wall 7 in Figure 5(a) will be described as an example), the joint can be effectively reinforced against compressive forces that may occur at the joint. In other words, the end of the other exterior wall 7 can be effectively reinforced by forming a high-strength area by pouring concrete with the same high design standard strength as the end area 31 in a portion of a specified layer thickness and length so that it is joined to the edge of the end area 31 in the innermost layer 30 of the main exterior wall 5'. [Explanation of symbols]

[0055] 1,1' architectural structure 2 Spent fuel pit 5~8 Exterior wall 9 Rooftop 10,10' outermost layer 20 Middle Class 11,11' central area 12,12' Peripheral area 30,30' innermost layer 31 End area 31a Corner area 32 Other areas

Claims

1. In architectural structures made of reinforced concrete or steel-reinforced concrete, At least one of the outer walls has a plurality of layers in a thickness direction, The outermost layer has a central region that is a region within a predetermined range from the periphery of the center of gravity in an elevational view, and a peripheral region other than the central region, The innermost layer has end regions including at least one of regions in a predetermined range from the upper and lower ends and regions in a predetermined range from the left and right ends when viewed from an elevation, and other regions other than the end regions, The design standard strength of the concrete in the central region is higher than the design standard strength of the concrete in the peripheral region, and An architectural structure characterized in that the design standard strength of the concrete in the end region is higher than the design standard strength of the concrete in the other region.

2. In architectural structures made of reinforced concrete or steel-reinforced concrete, At least one of the outer walls has a plurality of layers in a thickness direction, The outermost layer has a central region that is a region within a predetermined range from the periphery of the center of gravity in an elevational view, and a peripheral region other than the central region, The innermost layer has, in an elevational view, a corner area portion that is a region within a predetermined range from at least one corner portion, and other areas other than the corner area portion, The design standard strength of the concrete in the central region is higher than the design standard strength of the concrete in the peripheral region, and An architectural structure characterized in that the design standard strength of the concrete in the corner area is higher than the design standard strength of the concrete in the other areas.

3. The exterior wall has a rectangular shape in the elevation view, An architectural structure as described in claim 1 or claim 2, characterized in that the central region includes an area formed between a region having a width dimension that is 1 / 4 of the width of the left end portion of the exterior wall and a region having a width dimension that is 1 / 4 of the width of the right end portion of the exterior wall.

4. The exterior wall has a rectangular shape in the elevation view, The region within a predetermined range from the upper and lower ends includes a region formed between the upper end of the outer wall and a portion that is 1 / 8 of the height dimension from the upper end, and a region formed between the lower end of the outer wall and a portion that is 1 / 8 of the height dimension from the lower end, The architectural structure described in claim 1, characterized in that the area within a predetermined range from the left and right ends includes an area formed between the left end of the exterior wall and a portion that is 1 / 8 of the width dimension from the left end, as well as an area formed between the right end of the exterior wall and a portion that is 1 / 8 of the width dimension from the right end.

5. 5. The architectural structure according to claim 1, wherein the thickness of the outermost layer and the innermost layer is at least 1 / 3 of the total thickness of the exterior wall.

6. The central region and each end region have a design standard strength of 48 (N / mm ２ 6. The architectural structure according to claim 1, wherein the width of the at least one wall is equal to or larger than the width of the at least one wall.

Images