Building structure

Abstract

To provide technology that facilitates the realization of column-free spaces with minimal beam exposure between a core structural section formed at the central side of a building by wall structural bodies and a peripheral framing section formed at the peripheral side of the building by peripheral columns and peripheral beams, even when a floor area increases due to building enlargement in a building structure with the core structural section and the peripheral framing section.SOLUTION: A building structure comprises: a core structural section 1 formed on the central side of a building by wall structural bodies 11; a peripheral framing section 2 formed on the peripheral side of the building by peripheral columns 21 and peripheral beams 22; and a cantilevered framing section 3 formed by a plurality of cantilever beams 31 extending cantilevered from the core structural section 1 toward the peripheral side of the building and intermediate beams 32 spanning tips of the plurality of cantilever beams 31.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a building structure that includes a core structural section formed on the center side of the building using wall structures, and a peripheral frame section formed on the outer periphery side of the building using peripheral columns and peripheral beams. [Background technology]

[0002] A center-core building structure is known, which has a core structural section formed on the center side of the building using wall structures, and a peripheral frame section formed on the outer periphery side of the building using outer columns and outer beams (see, for example, Patent Document 1). In such a center-core building structure, if the distance from the core structural part to the outer periphery structural part is large, an intermediate beam may be provided to support the floor slab at an intermediate position between the core structural part and the outer periphery structural part in order to properly support the floor slab. Conventionally, intermediate beams have been installed between the intermediate portions of a pair of girders that extend between the core structural section and the outer periphery columns of the outer periphery frame section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-076293 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when an intermediate beam is provided between the middle parts of a pair of girders as described above, as the floor area increases with the size of the building, the span (in other words, the length) of the intermediate beam increases accordingly. This makes it necessary to add large girders or columns to properly support the intermediate beams with their large spans, which creates the problem that it is difficult to create a column-free space between the core structure and the outer frame that minimizes the appearance of the beam shape.

[0005] In view of this situation, the main objective of the present invention is to provide a technology that makes it easy to realize a column-free space that minimizes the appearance of beams between the core structural section and the outer periphery structural section in a building structure that includes a core structural section formed on the center side of the building using wall structures and an outer periphery structural section formed on the outer periphery side of the building using outer periphery columns and beams, even when the floor area increases as the building becomes larger. [Means for solving the problem]

[0006] The first characteristic configuration of the present invention is a core structure portion formed on the center side of the building in the wall structure, an outer periphery frame portion formed on the outer periphery of the building by outer periphery columns and outer periphery beams; a cantilevered frame structure portion including a plurality of cantilever beams extending from the core structural portion toward the outer periphery of the building and intermediate beams extending to the tips of the plurality of cantilever beams; The advantage of this system is that it is equipped with the following features.

[0007] According to this configuration, a cantilever frame section is provided that cantilevers out from the core structure section at the center of the building to the building periphery, so the intermediate beams of the cantilever frame section can support the floor slab at a position intermediate between the core structure section and the periphery frame section. Even if the floor area increases as the building grows in size and the intermediate beams become longer, this can be accommodated by, for example, increasing the number of cantilever beams that support the intermediate beams, without adding large girders or columns. Therefore, even if the floor area increases as the building becomes larger, it is possible to provide a building structure that makes it easy to create a column-free space that minimizes the appearance of beams between the core structural section and the outer periphery structural section. Furthermore, the cantilever frame section can easily change the top level of the intermediate beam by changing the cantilever height of the cantilever beam. Therefore, for example, the top level of the intermediate beam can be changed according to the target installation height of the floor slab portion supported above the intermediate beam, and the floor slab portion can be appropriately supported at the target installation height.

[0008] A second characteristic feature of the present invention is that the top end of the intermediate beam is set at a different height position from the top end of the outer peripheral beam.

[0009] According to this configuration, the top of the intermediate beam is set at a different height position from the top of the outer periphery beam, so that by utilizing the level difference between the top of the intermediate beam and the top of the outer periphery beam, it is possible to efficiently and easily create a gradient (e.g., a water gradient) along the inside and outside of the building for the floor slab supported by the intermediate beam and outer periphery beam.

[0010] A third characteristic configuration of the present invention is that the protruding portion of the protruding beam in the core structure is provided with an out-of-plane bending resistance column that resists the out-of-plane bending stress acting on the wall structure of the core structure.

[0011] According to this configuration, the out-of-plane bending resistance columns provided at the protruding points of the protruding beams in the core structure section can resist the out-of-plane bending stress acting on the wall structure of the core structure section, thereby allowing the protruding frame section to be properly supported by the core structure section. [Brief explanation of the drawings]

[0012] [Figure 1] Floor plan (beam plan) of a standard floor of a building that uses the building structure of this invention [Figure 2] Cross-sectional view of a main part of a building that employs the building structure of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of a building structure of the present invention will be described with reference to the drawings. 1 and 2, this building structure can be suitably employed in center-core buildings and the like, and comprises a core structure 1 configured, for example, rectangular in plan view, on the central side of the building with wall structures 11, and a perimeter frame 2 configured, for example, rectangular in plan view, on the outer perimeter side of the building with perimeter columns 21 and perimeter beams 22. In the perimeter frame 2, a large number of perimeter columns 21 are arranged at intervals along the perimeter of the building, and perimeter beams 22 are provided spanning pairs of adjacent perimeter columns 21.

[0014] Furthermore, in order to shorten the support span of the floor slab S (see Figure 2), this building structure is provided with a cantilevered frame section 3 made up of a plurality of cantilever beams 31 that cantilever out from the core structure section 1 towards the outer periphery of the building, and intermediate beams 32 that extend to the tips of the plurality of cantilever beams 31. In the example shown in Figure 1, four cantilever frame sections 3 are provided in correspondence with the respective sides of the core structure section 1, which is rectangular in plan view, but it is also possible to provide one to three cantilever frame sections 3 in correspondence with, for example, one to three specific sides where the support span of the floor slab S becomes longer.

[0015] In this way, in this building structure, the intermediate beam 32 of the cantilever frame 3 is located midway between the core structural member 1 and the outer periphery structural member 2, and this intermediate beam 32 can support the floor slab S (see Figure 2) midway between the core structural member 1 and the outer periphery structural member 2, thereby shortening the support span of the floor slab S. Furthermore, even if the floor area increases as the building becomes larger and the length of the intermediate beam 32 increases, this can be accommodated by, for example, increasing the number of cantilever beams 31 that support the intermediate beam 32, without adding large girders or columns. The specific configurations of the core structure 1 and the cantilever frame 3 will be explained below.

[0016] (Core structure) As shown in Figure 1, the core structure 1 is constructed by aggregating multiple wall structures 11 made of reinforced concrete or the like, which serve as earthquake-resistant elements of the building, and is constructed by placing the wall structures 11 between each of multiple internal columns 12 (four at the corners in the illustrated example) arranged at a predetermined column span. For example, the wall structures 11 can be a multi-story structure that continues over multiple floors.

[0017] Furthermore, in the core structure 1, the protruding points of the protruding beams 31 in the regions between the internal columns 12 are provided with out-of-plane bending resisting columns 13 that resist the out-of-plane bending stress acting on the wall structure 11 from the protruding beams 31. Each out-of-plane bending resisting column 13 is integrated with the wall structure 11 in an appropriate structure, for example, as an intra-wall column built into the wall structure 11, or by being joined to the outer surface, inner surface, or end surface of the wall structure 11. In this way, by being integrated with the wall structure 11, each out-of-plane bending resisting column 13 is able to resist the out-of-plane bending stress acting on the wall structure 11.

[0018] The out-of-plane bending resistance columns 13 are provided at each protruding point of the protruding beams 31 in the region between the internal columns 12. In the example shown in Fig. 1, one out-of-plane bending resistance column 13 is provided in the region between the internal columns 12, corresponding to the fact that there is one protruding point of the protruding beam 31 in the region between the internal columns 12, but this can be changed depending on the number of protruding points of the protruding beams 31.

[0019] Incidentally, when the out-of-plane bending resisting columns 13 are provided mainly to resist the out-of-plane bending stress acting on the wall structure 11 from the cantilever beams 31, the foundation for the out-of-plane bending resisting columns for transmitting the vertical load from the out-of-plane bending resisting columns 13 to the ground, etc. can be omitted. Conversely, by providing the foundation for the out-of-plane bending resisting columns, the vertical load can be made to be borne by the out-of-plane bending resisting columns 13.

[0020] (Protruding frame section) As shown in Figure 1, each of the cantilevered frame sections 3 is provided with a plurality of cantilevered beams 31 that cantilever from the core structural section 1 toward the periphery of the building, and intermediate beams 32 that extend to the tips of the plurality of cantilevered beams 31. The length of the cantilevered beams 31 can be set as appropriate, but for example, if a common corridor is to be arranged on the periphery of the core structural section 1, the length of the cantilevered beams 31 can be set to a length corresponding to the width of the common corridor. This makes it possible to minimize the appearance of beam shapes such as girders or columns in private spaces, etc., arranged on the periphery of the common corridor.

[0021] The protruding beams 31 include a first protruding beam 31A that protrudes from an installation area of ​​the internal columns 12 in the core structure 1, and a second protruding beam 31B that protrudes from an area between the internal columns 12 in the core structure 1. In this embodiment, the first protruding beam 31A is configured such that an end face of its base end is joined to the internal column 12 and protrudes from the internal column 12. In addition, the second protruding beam 31B is configured such that an end face of its base end is joined to the out-of-plane bending resisting column 13 and protrudes from the out-of-plane bending resisting column 13.

[0022] For example, as shown in Figure 2, the side of the tip of the intermediate beam 32 is joined to the end face of the tip of the first spring beam 31A (31), and the side of the middle part of the intermediate beam 32 in the longitudinal direction is joined to the end face of the tip of the second spring beam 31B (31), so that the intermediate beam 32 is provided across the tip of multiple (three in this example) spring beams 31. In this embodiment, an example is shown in which the tips of the four intermediate beams 32 arranged in a rectangular shape when viewed from above are not joined together, but it is also possible to join the tips of the four intermediate beams 32 together.

[0023] In addition, in this building structure, by projecting the multiple projecting beams 31 from a desired projecting height in each projecting frame section 3, it is possible to easily and efficiently change the top level of the intermediate beams 32 and change the posture and height position of the floor slab S. Further explanation will be given below with reference to Figure 2.

[0024] In Figure 2, the outer beams 22 of the outer frame section 2 are positioned at the same height position corresponding to the normal target floor level (FL) in each of the stories 41 to 43, and the third story 43, which is the uppermost in the figure, illustrates a case in which the floor slab S is hung horizontally at the normal height position. In addition, the second layer 42, which is the second from the top in the figure, illustrates a case where the floor slab S is installed diagonally at a normal height with a gradient that becomes lower toward the center of the building (an example of a gradient along the inside-outside direction of the building). Furthermore, the first layer 41, which is the lowest in the figure, illustrates a case where the floor slab S is installed horizontally at a position lower than the normal height.

[0025] In the third story 43, the cantilever frame section 3 has the cantilever height of the cantilever beams 31 set to the normal cantilever height, so that the top ends of the intermediate beams 32 are set to the same height as the top ends of the outer periphery beams 22. The floor slab S is then hung horizontally at the normal height position across the top ends of the intermediate beams 32 and the outer periphery beams 22.

[0026] In the second story 42, the cantilever frame section 3 has the cantilever height of the cantilever beams 31 set to a lower cantilever height than the normal cantilever height, so that the top ends of the intermediate beams 32 are set at a height position lower than the top ends of the peripheral beams 22 (an example of a height position different from the top ends of the peripheral beams 22).The floor slab S is then diagonally hung from the top ends of the intermediate beams 32 to the top ends of the peripheral beams 22 at a normal height position with a gradient that becomes lower towards the center of the building.

[0027] In the first story 41, the cantilever frame section 3 has the cantilever height of the cantilever beams 31 set to a lower cantilever height than the normal cantilever height, so that the top ends of the intermediate beams 32 are set at a height position lower than the top ends of the peripheral beams 22. The floor slab S is hung horizontally across the top ends of the intermediate beams 32 and the upper and lower middle parts of the peripheral beams 22 at a height position lower than the normal height position.

[0028] In this way, this building structure can change the posture and height position of the floor slab S by changing the top level of the intermediate beam 32 for each cantilever frame section 3. Therefore, as shown in Figure 2, the posture and height position of the floor slab S can be changed by changing the top level of the intermediate beam 32 for each floor of the same building, or, although not shown, the posture and height position of the floor slab S can be changed by changing the top level of the intermediate beam 32 for each area where the cantilever frame section 3 is present, even on the same floor, thereby enabling flexible response to changes in the posture and height position of the floor slab S within the same building.

[0029] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0030] (1) In the above embodiment, as shown in Figure 2, an example was given in which the floor slab S on the second floor 42 is diagonally hung with a slope that becomes lower toward the center of the building, but the floor slab S may also be diagonally hung with the opposite slope that becomes higher toward the center of the building. In this case, by setting the projection height of the projection beams 31 in the projection frame section 3 to a height higher than the normal projection height, the top end of the intermediate beam 32 is set at a height position higher than the top end of the peripheral beam 22 (an example of a height position different from the top end of the peripheral beam 22).The floor slab S is then set at a diagonal angle from the top end of the intermediate beam 32 to the top end of the peripheral beam 22 at a normal height position, with a gradient that becomes higher towards the center of the building.

[0031] (2) In the above-described embodiment, an example was given in which an out-of-plane bending resistance column 13 that resists the out-of-plane bending stress acting on the wall structure 11 of the core structure 1 is provided at the protruding point of the protruding beam 31 in the core structure 1. However, if the wall thickness of the wall structure 11 can be increased, the wall thickness of the wall structure 11 may be increased instead of the out-of-plane bending resistance column 13. [Explanation of symbols]

[0032] 1 Core structure 2 Peripheral frame 3 Extrusion frame section 11 Wall structure 13 Out-of-plane bending resistance columns 21 Periphery pillar 22 Perimeter beam 31 Cantilever beam 31A Cantilever beam 31B Cantilever beam 32 Intermediate beam

Claims

1. a core structure portion formed at the center of the building by a wall structure; an outer periphery frame portion formed on the outer periphery of the building by outer periphery columns and outer periphery beams; a cantilevered frame structure portion including a plurality of cantilever beams extending from the core structural portion toward the outer periphery of the building and intermediate beams extending to the tips of the plurality of cantilever beams; A building structure equipped with:

2. 2. The building structure according to claim 1, wherein the top end of the intermediate beam is set at a different height from the top end of the outer perimeter beam.

3. 3. A building structure according to claim 1, wherein the protruding portion of the protruding beam in the core structural portion is provided with an out-of-plane bending resistance column that resists out-of-plane bending stress acting on the wall structure of the core structural portion.

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