JP7548780B2 - Column and beam structure - Google Patents

Description

The present invention relates to a column-beam structure.

Various techniques have been proposed to increase the freedom of structural design in buildings with column-beam structures. For example, Patent Document 1 describes a structure that includes a first column-beam structure and a second column-beam structure that is arranged adjacent to the first column-beam structure so that the extension of the structural surface intersects with the structural surface of the first column-beam structure, and in which no columns are arranged at the positions where the structural surface of the first column-beam structure intersects with the extension of the structural surface of the second column-beam structure. Patent Document 2 describes a structure in which, in addition to the first and second column-beam structures similar to those described above, a steel beam is provided on the first column-beam structure.

JP 2012-144862 A JP 2012-144863 A

In buildings where a corridor and a balcony are placed on both sides of the beam direction as shared areas, with a private area placed between them, it is common to place beams extending in the girder direction on both sides of the private area, that is, between the private area and the corridor or balcony, to ensure sufficient structural strength. In this case, the beams interfere with the openings for entering and exiting the private area from the corridor or balcony, restricting the opening height, reducing livability and imposing design restrictions, which is a problem. The technology described in Patent Documents 1 and 2 above does not adequately address this problem.

Therefore, the present invention aims to provide a column-beam structure that allows for the placement of beams extending in the girder direction while minimizing the reduction in habitability and design constraints.

[1] A column-beam structure comprising an inner frame including a first beam extending in the beam-to-beam direction inside a building, and outer columns arranged in the girder direction of the building at least at both ends in the beam-to-beam direction and extending in the height direction, a second beam extending in the girder direction at both ends in the beam-to-beam direction and erected between the outer columns, and a third beam extending in the beam-to-beam direction at both ends in the beam-to-beam direction and erected between the outer columns, facing the interior space of the building, and comprising an outer frame that constitutes the outer periphery of the building.
[2] A column-beam structure as described in [1], in which the outer column is arranged to at least partially overlap the extension area of the inner frame in the beam-to-beam direction.
[3] The building has multiple floors, and the internal structure further includes wall columns arranged in the beam direction to connect the first beams arranged on each of the multiple floors to each other. A column-beam structure as described in [1] or [2].
[4] A column-beam structure as described in [3], in which a first beam is not installed between the wall columns located at both ends of the inner frame in the beam direction and the outer frame.
[5] A column-beam structure described in any one of [1] to [4], wherein the building has multiple floors, at least a portion of the multiple floors have exclusive use areas arranged in the girder direction, the first beam constitutes part of a partition wall formed between the exclusive use areas, and the third beam constitutes part of a gable wall facing the exclusive use areas located at the end of the girder direction.
[6] A column-beam structure described in any one of [1] to [5], wherein the building has multiple floors, and at least one of the second beam and the third beam is positioned at the bottom of each of the multiple floors.
[7] A column-beam structure described in any one of [1] to [6], wherein at least one of the first beam, the second beam and the third beam is a steel beam, and the outer column is a steel reinforced concrete column.
[8] A column-beam structure described in any one of [1] to [7], in which the exterior columns are arranged at both ends in the longitudinal direction as well as at other ends in the span direction.

With the above configuration, the beams extending in the girder direction are arranged as an external framework that forms the perimeter of the building, so the beams do not obstruct the opening between the exclusive area and the common area, for example, and this can reduce the decrease in livability of the building and design constraints.

1 is a perspective view of a building including a column-beam structure according to an embodiment of the present invention; FIG. 2 is a plan view of the building shown in FIG. 1 . 2 is another example of a floor plan of the building shown in FIG. 1 . 2 is yet another example of a floor plan of the building shown in FIG. 1 . FIG. 2 is a vertical cross-sectional view showing an example of the structure of the internal frame of the building shown in FIG. 1 . FIG. 2 is a vertical cross-sectional view showing another example of the structure of the internal frame of the building shown in FIG. 1 . FIG. 2 is a vertical cross-sectional view showing yet another example of the structure of the internal frame of the building shown in FIG. 1 . 1 is an enlarged vertical cross-sectional view showing an example of a structure at an end portion in a beam direction of a building according to one embodiment of the present invention. FIG. 1 is an enlarged vertical cross-sectional view showing another example of a structure at an end portion in a beam direction of a building according to one embodiment of the present invention. FIG. 1 is an enlarged vertical cross-sectional view showing another example of a structure at an end portion in a beam direction of a building according to one embodiment of the present invention. FIG. 1 is an enlarged vertical cross-sectional view showing another example of a structure at an end portion in a beam direction of a building according to one embodiment of the present invention. FIG. FIG. 2 is an enlarged vertical cross-sectional view showing an example of a structure at an end portion in the girder direction of a building according to one embodiment of the present invention. FIG. 11 is an enlarged vertical cross-sectional view showing another example of a structure at an end in the girder direction of a building according to one embodiment of the present invention. FIG. 11 is an enlarged vertical cross-sectional view showing yet another example of a structure at an end in the girder direction of a building according to one embodiment of the present invention. FIG. 2 is a plan view showing the relationship between the inner frame and the outer frame in a column-beam structure according to one embodiment of the present invention. FIG. 2 is a cross-sectional view showing an example of an H-shaped steel used as a structural material in one embodiment of the present invention. FIG. 2 is a diagram showing an example of the configuration of a joint between a steel beam and a floor slab in one embodiment of the present invention. FIG. 11 is a diagram showing another configuration example of the joint portion between the inter-beam steel beam and the floor slab in one embodiment of the present invention. FIG. 2 is an elevation view showing a configuration example of a portion along the girder direction of the external framework in one embodiment of the present invention. FIG. 2 is an elevation view showing a configuration example of a portion of the exterior framework along the beam direction in one embodiment of the present invention. 1 is a vertical cross-sectional view showing an example of a structure between an inner frame and an outer frame of a building according to one embodiment of the present invention. FIG. 1 is a vertical cross-sectional view showing another example of a structure between the inner frame and the outer frame of a building according to one embodiment of the present invention. FIG.

A preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. Note that in this specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and redundant explanations will be omitted.

1 is a perspective view of a building including a column-beam structure according to one embodiment of the present invention. In the illustrated example, the building 1 has a hierarchical structure, and the girder direction X and the beam-to-beam direction Y are defined in a substantially rectangular planar shape. Such a building 1, in which the dimension of the girder direction X is greater than the dimension of the beam-to-beam direction Y, is also called a plate-shaped building. The column-beam structure 10 for ensuring the structural strength of the building 1 includes an inner frame 11 including beam-to-beam steel beams extending in the beam-to-beam direction Y inside the building 1, and an outer frame constituting the outer periphery of the building 1. The outer frame includes a girder steel beam 121 extending in the girder direction X, an outer column 122 extending in the height direction Z, and an outer beam-to-beam steel beam described later. The girder steel beam 121 and the beam-to-beam steel beam are each erected between the outer columns 122. The building 1 further includes a floor slab 20 that separates each floor of the hierarchical structure. Such a building 1 can be used, for example, as an apartment building as described below, but is not limited to this example, and can be used as various facilities such as hospitals, schools, offices, accommodation facilities, or nursing homes for the elderly, in which private areas are arranged in the longitudinal direction X on at least some of the multiple floors.

Figure 2 is a plan view of the building shown in Figure 1. On each floor of a building 1 used as an apartment building, multiple private areas P, which are dwelling units, are arranged in the girder direction X. Partition walls D1 are formed between the multiple private areas P, and gable walls D2 are formed between the private areas P located at the ends of the girder direction X and the outside. An inner frame 11 including inter-beam steel beams described later constitutes part of the partition wall D1, and an outer inter-beam steel beam 123 of the outer frame 12 constitutes part of the gable wall D2. The wall thickness of the partition wall D1 is, for example, about 200 mm to 400 mm, more specifically, about 180 mm at minimum, and about 200 mm as standard. The wall thickness of the gable wall D2 is, for example, about 200 mm to 300 mm, more specifically, about 180 mm at minimum, and about 200 mm as standard.

In this embodiment, each component, including the inter-beam steel beams 111 of the interior frame 11 described later, is placed inside the partition wall D1, so that a large interior space can be secured without forming a beam in the exclusive use portion P. In addition, the exterior inter-beam steel beams 123 of the exterior frame 12 are placed inside the gable wall D2. Therefore, in this embodiment, the exterior inter-beam steel beams 123 indirectly and substantially face the interior space of the exclusive use portion P via non-structural materials such as finishing materials.

In addition, on each floor of the building 1, balconies B and passageways C that allow access between each of the multiple private areas P are arranged as common areas S. The balconies B are arranged continuously in the girder direction X so that adjacent private areas P can pass each other in an emergency, and the passageways C are arranged continuously in the girder direction X so that each private area P can enter and exit in normal times. In the example shown in FIG. 2, the balconies B are arranged on one side of the beam direction Y of the building 1, and the passageways C are arranged on the other side of the beam direction Y of the building 1. In other examples, as shown in FIG. 3, the common area S may not include a balcony, and only the passageways C may be arranged on one side of the beam direction Y, or as shown in FIG. 4, the passageways C may be arranged near the center of the beam direction Y, and the private areas P may be arranged on both sides of it.

As already mentioned, in this embodiment, the girder steel beams 121 extending in the girder direction X are arranged at both ends of the building 1 in the span direction Y as part of the external frame 12 that constitutes the outer periphery of the building 1. In addition, the outer columns 122 supporting the girder steel beams 121 are also arranged at both ends of the span direction Y. Therefore, for example, when the common area S is arranged on both sides of the span direction Y of the building 1 as in the example shown in FIG. 2, for example, a beam extending in the girder direction X is not arranged at the boundary between the exclusive area P and the common area S, so that the beam does not interfere with the opening for entering and exiting the exclusive area P from the balcony B or passage C of the common area S, and the opening height can be made large. In the example shown in FIG. 3, the same effect can be obtained for the opening for entering and exiting the exclusive area P from the passage C. In addition, even when the exclusive use portion P is arranged to one or both ends of the building 1 in the beam direction Y, as in the example shown in Figures 3 and 4, livability can be improved by preventing any obstructions such as a protruding ceiling caused by beams in the girder direction from being created within the exclusive use portion P.

To explain the opening height specifically, if a girder-direction beam is placed between the exclusive area P and the common area S as in the conventional case, the floor height of each floor needs to be 3m or more when the opening height is taken into consideration, but in the embodiment of the present invention, the opening height can be secured without being affected by the girder-direction steel beams 121 as described above, so a floor height of about 2.7m is sufficient. Therefore, for example, if the overall height of the building 1 is 45m, conventionally it would be 15 stories, but in this embodiment it is 16 stories, making effective use of the volume.

In addition, in this embodiment, the outer beam-to-beam steel beams 123 extending in the beam-to-beam direction Y of the building 1 are arranged at both ends in the girder direction X as part of the external structure that constitutes the outer periphery of the building 1. Therefore, even if the exclusive use portion P is arranged up to the ends in the girder direction X as in the examples shown in Figures 2 to 4, the livability can be improved because no obstacles such as ceiling overhangs due to beams in the girder direction are formed in the exclusive use portion P. By arranging the outer beam-to-beam steel beams 123 that constitute the external structure 12 inside the gable wall D2 and moving the outer columns 122 arranged in the beam direction Y at both ends in the girder direction X to the outside, a large indoor space can be secured without forming a beam type due to the outer beam-to-beam steel beams 123 or overhangs due to the outer columns 122 in the exclusive use portion P.

In the illustrated example, the exterior columns 122 are arranged at both ends of the girder direction X of the building 1 in addition to both ends of the span direction Y, but in other examples, the exterior columns 122 are not arranged at both ends of the girder direction X in addition to both ends of the span direction Y, and the exterior span steel beams 123 are erected in one span, thereby improving the design freedom at both ends of the girder direction X of the building 1.

5 and 6 are longitudinal cross-sectional views showing an example of the structure of the internal frame of the building shown in FIG. 1. In the illustrated example, the internal frame 11 includes inter-beam steel beams 111 and wall columns 112. The wall columns 112 are arranged in the inter-beam direction Y of the building 1 to connect the inter-beam steel beams 111 arranged on the lower floor Fd and the upper floor Fu to each other. In the example of FIG. 5, the inter-beam steel beams 111 are erected between the wall columns 112 arranged at a distance in the inter-beam direction Y. In the example of FIG. 6, a pair of wall columns 112 are arranged at positions corresponding to both ends of the exclusive use portion P in the inter-beam direction Y, and the inter-beam steel beams 111 are erected between these wall columns 112. The inter-beam steel beams 111 and the wall columns 112 are, for example, H-shaped steel, and are joined to each other by high-strength bolt friction joints or welded joints. By including the inter-beam steel beams 111 and wall columns 112 in the inner frame 11, the resistance of the inner frame 11 to horizontal loads acting in the inter-beam direction Y of the building 1 is increased. Therefore, for example, as described below, it is possible not to erect inter-beam steel beams between the wall columns 112 arranged at both ends of the inner frame 11 in the inter-beam direction Y and the outer columns 122 of the outer frame 12.

Figure 7 is a vertical cross-sectional view showing another example of the structure of the inner frame of the building shown in Figure 1. In the example of Figure 7, no wall columns are arranged, and the inner frame 11 is composed of inter-beam steel beams joined to the outer columns 122 at both ends in the inter-beam direction Y. Furthermore, in the illustrated example, braces 113 extending diagonally between the inter-beam steel beams of the lower floor Fd and the upper floor Fu are arranged to reinforce the inner frame 11. The braces 113 are, for example, H-shaped steel, and are joined to the inter-beam steel beams by high-strength bolt friction joints or welded joints. In this way, it is possible for the inner frame 11 to be configured without wall columns, and in that case, the strength of the inner frame 11 against horizontal loads acting in the inter-beam direction Y of the building 1 can be ensured by joining the inter-beam steel beams of the inner frame 11 to the outer columns 122 of the outer frame 12 at both ends in the inter-beam direction Y or by arranging the braces 113.

Figures 8 and 9A to 9C are enlarged vertical cross-sectional views showing an example of a structure at the end in the beam direction of a building according to one embodiment of the present invention. When a shared area S is arranged at the end in the beam direction Y of building 1 as in the example shown in Figures 2 and 3 above, handrail walls 31 may be arranged at the bottom of each shared area S of a multi-story structure as shown in Figure 8, and a girder steel beam 121 may be arranged inside the handrail walls 31. The handrail walls 31 are provided for purposes such as preventing falls and providing privacy, and a window sash, handrail, or privacy glass (not shown) may be arranged above the handrail walls 31 as necessary.

On the other hand, when the exclusive use portion P is arranged up to the end of the building 1 in the beam direction Y as in the example shown in Figures 3 and 4 above, an exterior wall 32 may be arranged between the exclusive use portion P and the outside, as shown in Figure 9A, and a girder steel beam 121 may be arranged inside the exterior wall 32. Also, as shown in Figures 9B and 9C, a waist wall 34 may be arranged at the bottom of the exclusive use portion P, and a girder steel beam 121 may be arranged inside the waist wall 34. In this case, a window 33 is arranged above the waist wall 34, and together with the waist wall 34, it separates the exclusive use portion P from the outside.

As in the examples of Figures 8 and 9A to 9C above, by arranging the girder steel beams 121 at the bottom of each of the multiple floors, hanging walls of the girder steel beams 121 are not formed in the parts of each floor facing the outer periphery of the building 1, and a wide view from the common areas S and private areas P can be ensured.

10 to 12 are enlarged vertical cross-sectional views showing an example of a structure at the end of the girder direction of a building according to one embodiment of the present invention. As already mentioned, at the end of the girder direction X of the building 1, the steel beams 123 extending in the beam direction Y are arranged as part of the external frame 12. As in the example shown in Figs. 9A to 9C above, the exterior wall 32 may be arranged between the exclusive use part P and the outside at the end of the girder direction X, and the steel beams 123 may be arranged inside the exterior wall 32. Also, as shown in Figs. 11 and 12, a spandrel wall 34 may be arranged at the bottom of the exclusive use part P, and the steel beams 123 may be arranged inside the spandrel wall 34. In this way, by arranging the steel beams 123 at the bottom of each of the multiple stories, a hanging wall of the steel beams 123 between the exterior beams is not formed in the part facing the outer periphery of the building 1 on each story, and a wide field of view from the exclusive use part P can be ensured.

Figure 13 is a plan view showing the relationship between the inner frame and the outer frame in a column-beam structure according to one embodiment of the present invention. The column-beam structure 10 includes an inner frame 11 including inter-beam steel beams 111 extending in the inter-beam direction Y inside the building 1, and an outer frame 12 forming the outer periphery of the building 1, and the outer frame 12 includes a girder steel beam 121, an outer column 122, and an outer inter-beam steel beam 123. The example shown in Figure 13 corresponds to the example described above with reference to Figure 5, and the inner frame 11 includes inter-beam steel beams 111 extending in the inter-beam direction Y and a plurality of wall columns 112 extending in the height direction Z. Note that the arrangement of the wall columns 112 may be changed as in the example described above with reference to Figure 6, and the inner frame 11 may not include wall columns as in the example described above with reference to Figure 7.

As shown in FIG. 13, the relationship between the inner frame 11 and the outer frame 12 is such that the outer columns 122 of the outer frame 12 arranged in the girder direction X are arranged to at least partially overlap the extension region M of the inner frame 11 in the span direction Y. The extension region M is an area that is extended in the span direction Y with the same width as the width of the inner frame 11, i.e., the dimension in the girder direction X. The outer columns 122 may be arranged, for example, as shown in FIG. 13, so that the center of the extension region M in the span direction X is aligned, or one end face in the span direction X is aligned with the end face on the same side of the extension region M. By arranging the outer columns 122 in this way, a space that is shielded from the outside can be formed by the partition of the balcony B, which is arranged on the extension line of the partition wall D1 at the same position as the inner frame 11, and the outer columns 122.

In the above-described inner frame 11 and outer frame 12, the inter-beam steel beams 111, the girder steel beams 121, and the outer inter-beam steel beams 123 are constructed as steel beams using H-shaped steel, but in other examples, reinforced concrete beams or steel reinforced concrete beams may be used. Also, the wall columns 112 are constructed as steel columns using H-shaped steel, for example, and the outer columns 122 are constructed as steel reinforced concrete columns using H-shaped steel as the steel material, but the wall columns 112 may be constructed as steel reinforced concrete columns or reinforced concrete columns, and the outer columns 122 may be constructed as reinforced concrete columns or steel columns.

Figure 14 is a cross-sectional view showing an example of an H-shaped steel used as a structural material in one embodiment of the present invention. The H-shaped steel 2 includes an upper flange 2A, a lower flange 2B, and a web 2C. In the H-shaped steel 2 used as the inter-beam steel beam 111, the beam depth h may be about 900 mm, the flange width W may be about 250 mm, the web thickness tw may be about 14 mm, and the flange thickness tf may be about 19 mm. In the H-shaped steel 2 used as the girder steel beam 121, the beam depth h may be about 500 mm to 700 mm, the flange width W may be about 200 mm, the web thickness tw may be about 9 mm, and the flange thickness tf may be about 12 mm to 22 mm. In the H-shaped steel 2 used as the outer inter-beam steel beam 123, the beam depth h may be about 500 mm, the flange width W may be about 200 mm, the web thickness tw may be about 9 mm, and the flange thickness tf may be about 16 mm to 19 mm. In addition, the H-shaped steel 2 used as the wall column 112 may have a member height h of about 500 mm to 900 mm, a flange width W of about 200 mm to 300 mm, a web thickness tw of about 9 mm to 19 mm, and a flange thickness tf of about 25 mm to 40 mm. In the H-shaped steel 2 used as the steel frame material of the outer column 122, the member height h may be about 500 mm to 900 mm, a flange width W of about 200 mm to 300 mm, a web thickness tw of about 9 mm to 19 mm, and a flange thickness tf of about 25 mm to 40 mm.

15 and 16 are diagrams showing an example of the configuration of the joint between the inter-beam steel beam and the floor slab in one embodiment of the present invention. In the example shown in FIG. 15, the floor slab 20 is placed on the upper surface of the upper flange 2A of the inter-beam steel beam 111 placed on the upper part of the partition wall D1 on each floor. In the example shown in FIG. 16, the inter-beam steel beam 111 placed on the lower part of the partition wall D1 on each floor is placed across the floor slab 20, and the floor slab 20 is placed on the side of the web 2C and on the upper surface of the lower flange 2B. The floor slab 20 is, for example, an RC slab, and may be a composite slab made of a deck plate and concrete, or a half PCa slab made of a combination of precast concrete and cast-in-place concrete.

Figure 17 is an elevation view showing an example of the configuration of a portion of the exterior frame along the girder direction in one embodiment of the present invention. In the example shown, the exterior frame 12 of the portion along the girder direction X at the end of the beam direction Y of the building 1 includes exterior columns 122 that continue in the height direction Z from the lower floor Fd to the upper floor Fu, and girder steel beams 121 that are erected between the exterior columns 122 at the bottom of each of the lower floor Fd and the upper floor Fu. As already mentioned, handrail walls 31 are provided in the passage C (shared area S), and the girder steel beams 121 are arranged inside the handrail walls 31.

Figure 18 is an elevation view showing an example of the configuration of a portion of the exterior frame along the beam direction in one embodiment of the present invention. In the example shown, the exterior frame 12 of the portion along the beam direction Y at the end of the girder direction X of the building 1 includes exterior columns 122 that continue in the height direction Z from the lower floor Fd to the upper floor Fu, and exterior beam-to-beam steel beams 123 that are erected between the exterior columns 122 at the lower parts of the lower floor Fd and the upper floor Fu. As already mentioned, an exterior wall 32 is provided in the exclusive use portion P, and the exterior beam-to-beam steel beams 123 are arranged inside the exterior wall 32 (gable wall D2).

In the above-mentioned external frame 12, both ends of the girder steel beam 121 and the outer beam-to-beam steel beam 123 are connected to the H-shaped steel 2 of the steel frame arranged inside the outer column 122, for example, by high-strength bolt friction joints or welding joints. The joints between the beam-to-beam steel beam 111 and the wall column 112 in the internal frame 11, and the joints between the girder steel beam 121 or the outer beam-to-beam steel beam 123 and the H-shaped steel of the steel frame of the outer column 122 in the external frame 12 are rigid joints, pin joints, or semi-rigid joints. Note that a semi-rigid joint is a joint type in which the rotational movement of the beam relative to the column is not completely but to some extent restricted, and the bending stress transmitted between the column and the beam is smaller than that of a rigid joint. Also, a pin joint is a joint type in which the rotational movement of the beam relative to the column is not substantially restricted, and the bending stress that can be transmitted between the column and the beam is zero or significantly smaller than that of other joint types. The definitions of such rigid, pin and semi-rigid connections are given in the European design standards (Eurocode3 Parts 1-8).

19 and 20 are vertical cross-sectional views showing an example of the structure between the inner frame and the outer frame of a building according to an embodiment of the present invention. In the example shown in FIG. 19, no inter-beam steel beam is installed between the wall columns 112 arranged at both ends of the inner frame 11 in the inter-beam direction Y and the outer frame 12, and instead, a connecting member 21 made of shaped steel material such as CT steel, angle steel, or channel steel is installed between the wall column 112 and the outer column 122 or the girder steel beam 121. The connecting member 21 is joined to the wall column 112 and the outer column 122 or the girder steel beam 121 by, for example, high-strength bolt friction joints using splice plates 22. Since the strength of the inner frame 11 against horizontal load is ensured by the structures of the inter-beam steel beam 111 and the wall column 112, the connecting member 21 only needs to bear the load of the floor slab 20 arranged in the common area S1. Therefore, the member depth _h2 of the connecting member 21 is smaller than the beam depth _h1 of the inter-beam steel beam 111. On the other hand, if the floor slab 20 can support its own weight and the load, the connecting member 21 may be omitted and the floor slab 20 may be directly joined to the girder steel beam 121 or the outer column 122 as in the example shown in FIG.

For example, as in the example described above with reference to Figures 5 and 6, if the strength of the internal frame 11 against horizontal loads is ensured by the structural components of the inter-beam steel beams 111 and wall columns 112, it is not necessary to erect inter-beam steel beams between the wall columns 112 located at both ends of the internal frame 11 in the inter-beam direction Y and the external frame 12, as in the example shown in Figures 19 and 20. This makes it possible to ensure a large space in the shared area S without forming a lowered ceiling or steps due to the inter-beam steel beams 111.

According to one embodiment of the present invention as described above, beams extending in the girder direction X, specifically girder steel beams 121, are arranged as the external framework 12 that constitutes the outer periphery of the building 1, so that the beams do not obstruct the opening between the exclusive area P and the common area S, and the reduction in livability of the building 1 and design constraints can be reduced.

In addition, in this embodiment, the steel beams 123 between the outer beams arranged as the external framework 12 at both ends of the building 1 in the girder direction X face the indoor space of the building 1, specifically the exclusive use area P, so that, for example, if the dimensions (frontage) in the girder direction X of each exclusive use area P are made the same, the exterior columns 122 can be arranged at equal intervals over the entire length of the girder direction X. This makes the span lengths of the girder steel beams 121 erected between the exterior columns 122 uniform, making design easier and making it easier to provide, for example, large openings. Furthermore, uniforming the dimensions of the girder steel beams 121 and the exterior columns 122 makes it easier to improve the appearance of the building 1.

The above describes in detail preferred embodiments of the present invention with reference to the attached drawings, but the present invention is not limited to these examples. It is clear that a person skilled in the art of the technical field to which the present invention pertains can come up with various modified or revised examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present invention.

1...building, 10...column and beam structure, 11...inner frame, 12...outer frame, 20...floor slab, 21...connecting member, 22...splice plate, 31...handrail wall, 32...external wall, 33...window, 34...waist wall, 111...inter-beam steel beam, 112...wall column, 113...brace, 121...girder steel beam, 122...external column, 123...external inter-beam steel beam.

Claims (7)

An inner frame including a first beam extending in a beam direction of the building inside the building;
An outer column arranged in the girder direction of the building at least at both ends in the beam direction and extending in the height direction;
a second beam extending in the span direction at both ends in the span direction and installed between the exterior columns; and a third beam extending in the span direction at both ends in the span direction and installed between the exterior columns and facing an interior space of the building, and comprising an exterior framework constituting an outer periphery of the building ,
The building has a plurality of stories, and at least a portion of the plurality of stories has a dedicated portion arranged in the girder direction,
The first beam constitutes a part of a partition wall formed between the exclusive use parts,
The third beam has a column-beam structure that constitutes part of the gable wall facing the exclusive portion located at both ends in the longitudinal direction . The column-beam structure according to claim 1, in which the outer columns are positioned so as to at least partially overlap the extension area of the inner frame in the beam-to-beam direction. The building has a plurality of floors,
3. The column-beam structure according to claim 1, wherein the internal frame further includes wall columns arranged in the beam-to-beam direction and connecting the first beams arranged on each of the plurality of stories to each other. The column-beam structure according to claim 3, in which the first beam is not installed between the wall columns arranged at both ends of the inner frame in the beam direction and the outer frame. The building has a plurality of floors,
The column-beam structure according to claim 1 , wherein at least one of the second beam and the third beam is disposed at a lower portion of each of the plurality of stories. The column-beam structure according to any one of claims 1 to 5 , wherein at least one of the first beam, the second beam and the third beam is a steel beam, and the outer column is a steel reinforced concrete column. The column-beam structure according to claim 1 , wherein the outer columns are arranged at both ends in the longitudinal direction other than both ends in the span direction.

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