Building structure

Abstract

To provide a building structure capable of uniforming vertical loads acting on piles, foundations, etc. supporting each column in lower stories, and to suppress unequal settlement of a building due to consolidation settlement of a foundation.SOLUTION: There is provided a building structure in which column spans 4x and 4y of an upper level portion 4 are wider than column spans 1x and 1y of a lower level portion 1, and in an intermediate level portion C between the upper level portion 4 and the lower level portion 1, a plurality of load distributing columns P are provided to distribute a vertical load from each of columns 41 of the upper level 4 portion having relatively wider column spans to multiple locations on a lower side separated in plan view. The plurality of load distributing columns P are provided in the middle level portion C in an arrangement state where the vertical load transferred to each of columns 11 of the lower level portion 1 having relatively narrow column spans are equal or nearly equal.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a building structure in which the column span of the upper floor is wider than the column span of the lower floor. [Background technology]

[0002] In a building structure like that described above, columns on the upper floors, which have a relatively wide column span, may be positioned away from the position directly above columns on the lower floors, which have a relatively narrow column span. In such cases, variation (bias) in the vertical load transmitted to each column on the lower floors may occur.

[0003] Patent Document 1 discloses that when some of the columns (61c) in the upper layer shift from the position directly above the columns (21Me, 21M) in the lower layer, a bifurcated load distribution column (two corner diagonal members 42) is provided to distribute the vertical load from the shifted column (61c) in the upper layer to the two columns (21Me) in the lower layer. However, even in this case, it is thought that there will be variation (bias) in the vertical load transmitted to each column (21Me, 21M) in the lower layer between the parts where the bifurcated load distribution column is provided and the parts where it is not. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-184711 A Summary of the Invention [Problem to be solved by the invention]

[0005] If there is variation (bias) in the vertical load transmitted to each column in the lower level as described above, there will also be variation in the vertical load acting on the piles and foundations that support each column in the lower level. In areas where consolidation settlement occurs in the ground, there is a risk of serious problems such as uneven settlement of the building and tilting of the building floor.

[0006] In view of this situation, the main objective of the present invention is to provide a building structure in which the column spans of the upper floors are wider than those of the lower floors, which can equalize the vertical load acting on the piles and foundations supporting each column on the lower floors, and suppress uneven settlement of the building due to consolidation settlement of the ground. [Means for solving the problem]

[0007] The first characteristic configuration of the present invention is a building structure in which the column span of the upper floor is wider than the column span of the lower floor, The intermediate layer between the upper layer and the lower layer is provided with a plurality of load distribution columns that distribute vertical loads from each of the upper layer columns having a relatively wide column span to a plurality of locations on the lower side that are distant in a plan view; A plurality of the load distribution columns are Equally divide the vertical load from each of the upper columns having a relatively wide column span, The lower level columns have relatively narrow column spans. and distributing the heat from the upper layer to the lower layer between the portion immediately below the base of each of the upper layer columns and the portion immediately above the capital of each of the lower layer columns. The intermediate layer is provided in the above-mentioned state. R, The intermediate layer is provided with, as the load distribution columns, a bifurcated first direction distribution column arranged in a position along the first direction in a plan view so as to distribute the vertical load from the columns of the upper layer to two locations separated in the first direction in a plan view, and a bifurcated second direction distribution column arranged in a position along the second direction in a plan view so as to distribute the vertical load from the columns of the upper layer to two locations separated in a second direction intersecting the first direction in a plan view, The intermediate floor portion includes a plurality of intermediate floors, The first direction distribution columns and the second direction distribution columns are arranged in a vertical line with respect to the plurality of intermediate floors so as to distribute the vertical load from the columns of the upper floors in stages in the first direction and the second direction downward. It is at the point.

[0008] According to this configuration, the vertical load transmitted to each of the columns in the lower level, which has a relatively narrow column span, can be equalized by using multiple load distribution columns arranged in the above-mentioned manner in the intermediate level between the upper level, which has a relatively wide column span, and the lower level, which has a relatively narrow column span. This makes it possible to equalize the vertical load acting on the piles and foundations supporting each column in the lower level, thereby suppressing uneven settlement of the building due to consolidation settlement of the ground.

[0010] Furthermore,According to this configuration, a vertical load can be distributed in both the first and second directions by a bifurcated first direction distribution column arranged in a position along a first direction (e.g., the X direction) in a planar view, and a bifurcated second direction distribution column arranged in a position along a second direction (e.g., the Y direction) in a planar view. The vertical load transmitted to each column in the lower part can be equalized in accordance with the specific relationship between the column spans in the upper part and the column spans in the lower part. In addition, by using first direction distribution columns and second direction distribution columns with different attitudes depending on the planning of the building's interior space, it is possible to equalize the vertical load transmitted to each column in the lower floors without interfering with the planning of the building's interior space as much as possible. Furthermore, according to this configuration, for example, the vertical load from a single column on the upper floor can be distributed to two locations spaced apart in the first direction (or second direction) by a single first direction distribution column (or second direction distribution column) on an intermediate floor on the upper side, and the vertical load from those two locations can be distributed to four locations spaced apart in the second direction (or first direction) by two second direction distribution columns (or first direction distribution columns) on an intermediate floor on the lower side, thereby making it possible to appropriately distribute the vertical load from a single column on the upper floor to four columns on the lower side.

[0011] The second characteristic configuration of the present invention is a building structure in which the column span of the upper layer is wider than the column span of the lower layer, The intermediate layer between the upper layer and the lower layer is provided with a plurality of load distribution columns that distribute vertical loads from each of the upper layer columns having a relatively wide column span to a plurality of locations on the lower side that are distant in a plan view; In a first direction and a second direction intersecting the first direction in a plan view, the column span of the upper layer is wider than the column span of the lower layer, Each of the columns of the upper layer is disposed at a central position of a lower layer one-span area corresponding to one column span of the lower layer in the first direction and the second direction in a plan view; The multiple load distribution columns are provided in the middle layer in a state where they are positioned between the base of the upper layer column located in the center of each of the lower layer-span areas and the top of the multiple columns of the lower layer located in each of the lower layer-span areas, so as to equally divide the vertical load from the upper layer column located in the center of each of the lower layer-span areas and distribute it evenly or approximately evenly to the multiple columns of the lower layer located in each of the lower layer-span areas. According to this configuration, the vertical load transmitted to each of the columns in the lower level, which has a relatively narrow column span, can be equalized by using multiple load distribution columns arranged in the above-mentioned manner in the intermediate level between the upper level, which has a relatively wide column span, and the lower level, which has a relatively narrow column span. This makes it possible to equalize the vertical load acting on the piles and foundations supporting each column in the lower level, thereby suppressing uneven settlement of the building due to consolidation settlement of the ground. A third characteristic configuration of the present invention is that the middle layer is provided with, as the load distribution columns, a bifurcated first direction distribution column arranged in a position along the first direction in a planar view so as to distribute the vertical load from the columns of the upper layer to two locations that are spaced apart in the first direction in a planar view, and a bifurcated second direction distribution column arranged in a position along the second direction in a planar view so as to distribute the vertical load from the columns of the upper layer to two locations that are spaced apart in the first direction in a planar view that intersects the first direction in a planar view. According to this configuration, a vertical load can be distributed in both the first and second directions by a bifurcated first direction distribution column arranged in a position along a first direction (e.g., the X direction) in a planar view, and a bifurcated second direction distribution column arranged in a position along a second direction (e.g., the Y direction) in a planar view. The vertical load transmitted to each column in the lower part can be equalized in accordance with the specific relationship between the column spans in the upper part and the column spans in the lower part. In addition, by using first direction distribution columns and second direction distribution columns with different attitudes depending on the planning of the building's interior space, it is possible to equalize the vertical load transmitted to each column in the lower floors without interfering with the planning of the building's interior space as much as possible. The present invention 4 A characteristic feature of the present invention is that the intermediate layer portion is zoned into a first direction distribution column zone that gathers the first direction distribution columns and a second direction distribution column zone that gathers the second direction distribution columns.

[0012] According to this configuration, first direction distribution columns oriented along the first direction are collected in a first direction distribution column zone, and second direction distribution columns oriented along the second direction are collected in a second direction distribution column zone, so that the distribution columns can be collected in a row or parallel arrangement within each zone, making it easier to plan including corridors, etc. within each zone. [Brief description of the drawings]

[0015] [Figure 1]FIG. 1 is a perspective view showing a schematic diagram of a building structure according to the present invention; [Diagram 2] A plan view showing the arrangement of columns on each floor of the building structure of the present invention. [Diagram 3] FIG. 11 is a plan view showing the arrangement of columns on each floor of another embodiment of the building structure of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An embodiment of a building structure of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a schematic diagram of a part of the building structure in the case of a four-story building, Fig. 2(a) is a plan view showing the arrangement of columns 41 in the upper floor 4 (fourth floor), Fig. 2(b) is a plan view showing the arrangement of columns 31 in the middle floor 3 (third floor) on the upper floor side of the middle floor C, Fig. 2(c) is a plan view showing the arrangement of columns 21 in the middle floor 2 (second floor) on the lower floor side of the middle floor C, and Fig. 2(d) is a plan view showing the arrangement of columns 11 in the lower floor 1 (first floor). In Fig. 2(a) to (d), the columns of the floor in question are shown with solid lines, and the columns of the floor one floor higher are shown with dashed lines, in order to make it easier to understand the flow of vertical load.

[0017] As shown in Fig. 1, this building structure includes a building skeleton K consisting of columns 11, 21, 31, and 41 on each floor, and beams (not shown), slabs, walls (not shown), etc., erected between adjacent columns 11, 21, 31, and 41 on each floor. The columns 11 on the lower floor 1 are supported by piles (not shown), for example, via foundation footings.

[0018] As shown in Figures 1 and 2, this building structure is configured such that the column spans 4x, 4y (see Figure 2) of the upper floor 4 are wider than the column spans 1x, 1y (see Figure 2) of the lower floor 1 in the X direction (corresponding to the first direction) and the Y direction (corresponding to the second direction) intersecting the X direction in a plan view. As an example, Figures 1 and 2 show a case in which the column spans 4x, 4y of the upper floor 4 are four times the column spans 1x, 1y of the lower floor 1. In this case, the column 41 of the upper floor 4 is disposed at the center of a rectangular area (hereinafter referred to as "lower floor one-span area A") corresponding to one column span of the lower floor 1 in the X and Y directions in a plan view.

[0019] The intermediate floor C between the upper floor 4 and the lower floor 1 is provided with a large number (one example of multiple) of load distribution columns P as its columns 21, 31, which distribute the vertical load from each of the columns 41 of the upper floor 4, which has a relatively wide column span, to multiple locations on the lower side that are distant when viewed in a plan view. Each load distribution column P has one column head connected to the part directly below the base of the column of the column on the floor above in the building structure K (a column-beam joint or a slab), and multiple column bases connected to the parts directly above the column head of the column of the floor below (a column-beam joint, a slab, etc.), thereby distributing the vertical load from one point on the upper side to multiple points on the lower side.

[0020] In this building structure, a large number of load distribution columns P are provided in the middle floor C in an arrangement such that the vertical load transmitted to each of the columns 11 in the lower floor 1, which has a relatively narrow column span, is even or approximately even throughout the entire building structure K. In this embodiment, a large number of load distribution columns P are arranged in the middle floor C targeting all of the columns 41, 11 of the upper floor 4 and lower floor 1 so that the vertical load from the column 41 of the upper floor 4, which is located at the center of each "lower floor-span area A", is divided into four equal parts and distributed evenly or approximately equally to the four columns 11 of the lower floor 1, which are located at the corners of each "lower floor-span area A".

[0021] Therefore, by providing a large number of load distribution columns P in the above-mentioned arrangement in the middle layer C, the vertical load transmitted to each of the columns 11 in the lower layer 1, which has a relatively narrow column span, can be equalized throughout the entire building structure K, and the vertical load acting on the piles supporting each column 11 in the lower layer 1 can be equalized to suppress uneven settlement of the building due to consolidation settlement of the ground.

[0022] The middle layer C is provided with load distribution columns P, which include a bifurcated X-direction distribution column Px (corresponding to a first direction distribution column) arranged in a position along the X direction in a planar view so as to distribute the vertical load from the columns 41 of the upper layer 4 to two locations spaced apart in the X direction in a planar view, and a bifurcated Y-direction distribution column Py (corresponding to a second direction distribution column) arranged in a position along the Y direction in a planar view so as to distribute the vertical load from the columns 41 of the upper layer 4 to two locations spaced apart in the Y direction in a planar view.

[0023] The bifurcated X-direction distribution column Px and Y-direction distribution column Py are configured to have an inverted V shape in side view, with two inclined column sections p1 separated in plan view connected at the column capital. Note that the X-direction distribution column Px and Y-direction distribution column Py may also have an inverted Y shape in side view, with two inclined column sections p1 separated in plan view connected to one upper column section at the upper and lower middle parts of the column.

[0024] In this building structure, the interior of the building is zoned into an X-direction distribution column zone Zx (corresponding to the first direction distribution column zone) that collects the X-direction distribution columns Px, and a Y-direction distribution column zone Zy (corresponding to the second direction distribution column zone) that collects the Y-direction distribution columns Py. Specifically, the middle floor section C includes an upper middle floor 3 and a lower middle floor 2, and the Y-direction distribution columns Py are arranged in a row or in parallel on the upper middle floor 3 to form a Y-direction distribution column zone Zy, and the X-direction distribution columns Px are arranged in a row or in parallel on the lower middle floor 2 to form an X-direction distribution column zone Zx. In other words, in this embodiment, the X-direction distribution column zone Zx and the Y-direction distribution column zone Zy are vertically zoned. In this way, by gathering the distribution pillars Px, Py in a line or in parallel in each distribution pillar zone Zx, Zy, it becomes easier to plan corridors and the like within each zone.

[0025] In addition, the X-direction distribution columns Px and Y-direction distribution columns Py are arranged in a continuous line in the vertical direction on the upper and lower intermediate floors 2, 3 so as to distribute the vertical load from the columns 41 of the upper floor 4 downward in two stages (an example of multiple stages) in the X direction and the Y direction.

[0026] Specifically, on the upper intermediate floor 3, as shown in Figures 1, 2(a), and 2(b), one column capital of each Y-direction distribution column Py which is an inverted V-shaped column when viewed from the side and serves as a column 31 of the intermediate floor 3 is connected to the portion directly below the base of a column 41 of the upper floor 4 in the building structure K, and the two column bases of each Y-direction distribution column Py which is inverted V-shaped when viewed from the side are connected to two points spaced apart in the Y direction in the building structure K by a distance equivalent to one column span 1y of the lower floor 1.

[0027] Also, on the intermediate floor 2 on the lower floor side, as shown in Figures 2(b) and 2(c), the column heads of each X-direction distribution column Px which is shaped like an inverted V in side view and serves as columns 21 of the intermediate floor 2 are connected to the parts directly below the bases of each column 31 (Y-direction distribution column Py) of the intermediate floor 3 on the upper floor side in the building structure K, and the two column bases of each Y-direction distribution column Py which is shaped like an inverted V in side view are connected to two locations apart in the X direction in the building structure K by a distance of one span 1x of the lower part 1, i.e., directly above the column heads of the columns 11 of the lower part 1 in the building structure K.

[0028] Therefore, in the entire building structure K, the vertical load from the columns 41 of the upper floor 4 is divided into two equal parts by the Y-direction distribution column Py of the middle floor 3 on the upper floor side into two parts separated in the Y direction, and then the bisected vertical load is further divided into two equal parts by the X-direction distribution column Px of the middle floor 2 on the lower floor side into two parts separated in the X direction. In this way, in a plan view, the vertical load from the columns 41 of the upper floor 4 located in the center of each "lower floor one-span area A" can be divided into four equal parts and distributed equally or approximately equally to the four columns 11 of the lower floor 1 located at the corners of each "lower floor one-span area A".

[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 alone, but may also be applied in combination with the configurations of other embodiments.

[0030] (1) In the above embodiment, the Y-direction distribution columns Py are arranged in a group on the upper intermediate floor 3, and the X-direction distribution columns Px are arranged in a group on the lower intermediate floor 2, and the X-direction distribution column zone Zx and the Y-direction distribution column zone Zy are vertically zoned in the vertical direction. However, as shown in FIG. 3, both the Y-direction distribution columns Py and the X-direction distribution columns Px may be arranged on each of a plurality of intermediate floors 3, and on each intermediate floor 3, some areas may be X-direction distribution column zones Zx and some areas may be Y-direction distribution column zones Zy, and the X-direction distribution column zones Zx and the Y-direction distribution column zones Zy may be zoned in a plan view. In addition, Figures 3(a) to (d), like Figures 2(a) to (d), show the arrangement of columns on each floor, with the columns on the floor in question shown by solid lines and the columns on the floor above shown by dashed lines.

[0031] In the example shown in Figure 3, on the upper intermediate floor 3 (see Figure 3(b)), the Y-direction distribution columns Py are gathered and arranged on both sides of the X-direction to form the Y-direction distribution column zone Zy, and the X-direction distribution columns Px are gathered and arranged in the center in the X-direction to form the X-direction distribution column zone Zx, and on the lower intermediate floor 2, the X-direction distribution column zone Zx and the Y-direction distribution column zone Zy are zoned in a plane in the X-direction.

[0032] In addition, on the intermediate floor 2 on the lower floor side (see Figure 3 (c)), the X-direction distribution columns Px are gathered and arranged on both sides in the X direction to form the X-direction distribution column zone Zx, and the Y-direction distribution columns Py are gathered and arranged in the center in the X direction to form the Y-direction distribution column zone Zy, and on the intermediate floor 2 on the lower floor side as well, the X-direction distribution column zone Zx and the Y-direction distribution column zone Zy are zoned in a planar manner in the left-right direction in the figure.

[0033] In this case, on both sides in the X direction, the vertical load from the column 41 of the upper floor 4 is divided into two equal parts at two locations separated in the Y direction by the Y direction distribution column Py of the Y direction distribution column zone Zy of the intermediate floor 3 on the upper floor side, and the divided vertical load is further divided into two equal parts at two locations separated in the X direction by the X direction distribution column Px of the X direction distribution column zone Zx of the intermediate floor 2 on the lower floor side. In this way, on both sides in the X direction, the vertical load from the column 41 of the upper floor 4 arranged at the center position of each "lower floor one-span area A" in plan view can be divided into four equal parts and distributed equally or approximately equally to the four columns 11 of the lower floor 1 arranged at the corners of each "lower floor one-span area A".

[0034] Also, in the center in the X direction, the vertical load from the column 41 of the upper floor 4 is divided into two equal parts at two locations separated in the X direction by the X-direction distribution column Px of the X-direction distribution column zone Zx of the intermediate floor 3 on the upper floor side, and the divided vertical load is further divided into two equal parts at two locations separated in the Y direction by the Y-direction distribution column Py of the Y-direction distribution column zone Zy of the intermediate floor 2 on the lower floor side. In this way, in the center in the X direction, the vertical load from the column 41 of the upper floor 4 arranged at the center position of each "lower floor one-span area A" in plan view can be divided into four equal parts and distributed equally or approximately equally to the four columns 11 of the lower floor 1 arranged at the corners of each "lower floor one-span area A".

[0035] In addition, when zoning the X-direction distribution column zone Zx and the Y-direction distribution column zone Zy in a planar manner on the intermediate floor 2, zoning is not limited to the X direction shown in Figure 3, but can be done according to the plan, for example, the Y direction, diagonal direction, or by specific area.

[0036] (2) In the above embodiment, when the column span 4x, 4y of the upper floor 4 is four times the column span 1x, 1y of the lower floor 1, two intermediate floors having a bifurcated load distribution column P are provided to distribute the vertical load from the column 41 of the upper floor 4 to the four columns 11 of the lower floor 1. However, when the column span 4x, 4y of the upper floor 4 is eight times the column span 1x, 1y of the lower floor 1, four intermediate floors having a bifurcated load distribution column P can be provided to distribute the vertical load from the column 41 of the upper floor 4 to the four columns 11 of the lower floor 1. In short, the number of intermediate floors having a load distribution column P can be set so that the vertical load transmitted to each of the columns 11 of the lower floor 1 is uniform or approximately uniform throughout the entire building structure K, depending on the relationship between the column span 4x, 4y of the upper floor 4 and the column span 1x, 1y of the lower floor 1.

[0037] (3) In the above-described embodiment, the multiple load distribution columns P that distribute the vertical load from each of the columns 41 on the upper floor 4 to multiple locations on the lower side that are spaced apart in a planar view are shown as bifurcated columns that distribute the load to two locations on the lower side that are spaced apart in a planar view. However, the load distribution columns P may also be trifurcated or quadruple-furcated columns that distribute the load to three or four locations on the lower side that are spaced apart in a planar view.

[0038] (4) In the above embodiment, an example was shown in which the intermediate floor C between the upper floor 4 and the lower floor 1 includes two intermediate floors having load distribution columns P, but it may also include one or three or more intermediate floors.

[0039] (5) In the above embodiment, the load distribution columns P are arranged vertically so as to distribute the vertical load from the columns 41 of the upper floor 4 downward in two stages (one example of multiple stages) in the X direction and the Y direction, but they may be arranged vertically so as to distribute the load in three or more stages in the X direction and the Y direction. Furthermore, the load distribution columns P may be arranged vertically so as to distribute the vertical load from the columns 41 of the upper floor 4 downward in multiple stages only in either the X direction or the Y direction, or may be arranged to distribute the load in one stage only in either the X direction or the Y direction.

[0040] (6) In the above embodiment, the case where the X-direction distribution columns Px and the Y-direction distribution columns Py are provided as the load distribution columns P is shown as an example. However, only one of them may be provided.

[0041] (7) The building structure of the present invention is not limited to the four-story building structure shown in the above embodiment, but can be suitably applied to building structures of three stories or five or more stories.

[0042] (8) In the above embodiment, the building structure and building skeleton K are illustrated as being configured to have a size of three or five column spans in the X direction and three column spans in the Y direction based on the column spans 1x, 1y of the lower floor 1. However, this is merely a portion shown for the sake of convenience in explaining the building structure of the present invention, and the building skeleton K can naturally be configured to have an appropriate size.

[0043] (9) In the above-described embodiment, the columns 11 of the lower layer 1 are each supported on a pile via a foundation footing (supported on a pile foundation), but they may each be directly supported on the ground via a foundation footing (supported on a direct foundation). [Explanation of symbols]

[0044] 1 Lower part 1x,1y Lower Column Span 11 Lower Pillar 2. Middle floor 3. Middle floor 4. Upper Management 4x,4y Upper column span 41 Upper Pillar C Middle layer P load distribution column X first direction Y Second direction Px X direction distribution column (first direction distribution column) Py Y direction distribution column (second direction distribution column) Zx X-direction distribution column zone (first direction distribution column zone) Zy Y-direction distribution column zone (second direction distribution column zone)

Claims

1. A building structure in which the column span of the upper floor is wider than the column span of the lower floor, The intermediate layer between the upper layer and the lower layer is provided with a plurality of load distribution columns that distribute vertical loads from each of the upper layer columns having a relatively wide column span to a plurality of locations on the lower side that are distant in a plan view; The plurality of load distribution columns are provided in the middle layer in a state in which they are disposed between the portions directly below the bases of the columns in the upper layer and the portions directly above the capitals of the corresponding columns in the lower layer, so as to equally divide the vertical load from each of the columns in the upper layer, which has a relatively wide column span, and distribute it evenly or approximately evenly to each of the columns in the lower layer, which has a relatively narrow column span; The intermediate layer is provided with, as the load distribution columns, a bifurcated first direction distribution column arranged in a position along the first direction in a plan view so as to distribute the vertical load from the columns of the upper layer to two locations separated in the first direction in a plan view, and a bifurcated second direction distribution column arranged in a position along the second direction in a plan view so as to distribute the vertical load from the columns of the upper layer to two locations separated in a second direction intersecting the first direction in a plan view, The intermediate floor portion includes a plurality of intermediate floors, A building structure in which the first direction distribution column and the second direction distribution column are arranged in a vertical line relative to multiple intermediate floors so as to gradually distribute the vertical load from the columns in the upper floors downward in the first direction and the second direction.

2. A building structure in which the column span of the upper floor is wider than the column span of the lower floor, The intermediate layer between the upper layer and the lower layer is provided with a plurality of load distribution columns that distribute vertical loads from each of the upper layer columns having a relatively wide column span to a plurality of locations on the lower side that are distant in a plan view; In a first direction and a second direction intersecting the first direction in a plan view, the column span of the upper layer is wider than the column span of the lower layer, Each of the columns of the upper layer is disposed at a central position of a lower layer one-span area corresponding to one column span of the lower layer in the first direction and the second direction in a plan view; A building structure in which the multiple load distribution columns are provided in the middle floor, positioned between the base of the upper floor column located in the center of each of the lower floor-span areas and the top of the multiple columns of the lower floor located in each of the lower floor-span areas, so as to equally divide the vertical load from the upper floor column located in the center of each of the lower floor-span areas and distribute it evenly or approximately evenly to the multiple columns of the lower floor located in each of the lower floor-span areas.

3. The building structure described in claim 2, wherein the middle floor is provided with, as the load distribution columns, a bifurcated first direction distribution column arranged in a position along the first direction in a planar view so as to distribute the vertical load from the columns of the upper floor to two locations that are spaced apart in the first direction in a planar view, and a bifurcated second direction distribution column arranged in a position along the second direction in a planar view so as to distribute the vertical load from the columns of the upper floor to two locations that are spaced apart in the second direction in a planar view.

4. The building structure according to claim 1 or 3, wherein the middle floor portion is zoned into a first direction distribution column zone that gathers the first direction distribution columns and a second direction distribution column zone that gathers the second direction distribution columns.

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