JP7045302B2 - Building frame structure - Google Patents

Description

The present invention relates to a building frame structure.

As a frame structure of a building, a frame structure having a plurality of columns and beams connecting the columns is known. Various ducts and air conditioners are installed in buildings, but when installing ducts and the like, it is required to secure an installation space for the ducts and the like without penetrating the beams.

Therefore, in the frame structure described in Patent Document 1, a steel haunch beam is provided between the core wall inside the building and the column-beam frame on the outer periphery of the building, and the steel haunch beam is provided with a small end of the beam and a large beam. It is composed of a haunch portion (intermediate portion) protruding downward. As a result, it is possible to secure an installation space for a duct or the like under the small end of the beam.

Further, in the frame structure described in Patent Document 2, a beam for joining columns adjacent to each other in the first direction of a building is formed, and a beam formed in an intermediate portion in the material axial direction is formed from a beam formed at both ends in the material axial direction. It is also a small haunch girder. As a result, it is possible to secure an installation space for a duct or the like under the middle portion of the haunch girder. Moreover, the beam that joins the columns adjacent to each other in the second direction orthogonal to the first direction is an orthogonal girder having the same beam formation as the intermediate portion of the haunch girder. As a result, it is possible to secure an installation space for a duct or the like under the beam of the orthogonal girder.

Japanese Patent No. 4016759 Japanese Unexamined Patent Publication No. 2000-28207

However, in the frame structure described in Patent Documents 1 and 2, in order to form a haunch portion at the middle portion and both ends of the beam, processing is added to the beam so that the middle portion and both ends protrude downward. Therefore, the structure may be complicated and the workability may be deteriorated.

In view of this situation, a main object of the present invention is to provide a frame structure of a building that can secure an installation space for ducts and the like while simplifying the structure and improving workability.

The first characteristic configuration of the present invention is provided with a long span portion having a long column span and a short span portion having a short column span in the first direction of the building.
A long-span beam for joining adjacent columns in the long-span portion and a short-span beam for joining adjacent columns in the short-span portion are provided.
The beam formation of the long-span beam is made smaller than the beam formation of the short-span beam .
In the first direction of the building, a plurality of the long span portions and the long span beams are provided at predetermined intervals.
The plurality of long-span beams include a first long-span beam whose joint between both ends thereof and a column is a rigid joint.
A second long span beam is provided in which the joint between both ends and the column is a pin joint.
The point is to make the beam formation of the second long span beam smaller than the beam formation of the first long span beam .

According to this configuration, the rigidity of the short-span beam is higher than that of the long-span beam due to the difference in length between the long-span beam and the short-span beam. However, it is possible to make the short-span beam bear a large burden on the seismic load (seismic force) and reduce the burden on the long-span beam. Therefore, the beam of the long-span beam is simply made smaller than the beam of the short-span beam without processing such as forming a haunch part at the middle part or both ends of the beam. An installation space such as a duct can be secured underneath. As a result, it is possible to secure an installation space for ducts and the like in a state of appropriately responding to the seismic load while simplifying the structure and improving the workability.
Moreover, according to this configuration, since a plurality of long span beams are provided at predetermined intervals in the first direction of the building, it is possible to secure an installation space for ducts and the like at predetermined intervals, and installation of ducts and the like can be secured. The degree of freedom of the place can be improved.
Further, according to this configuration, since the joint between both ends of the second long span beam and the column is a pin joint, the second long span beam is the second longer than the first long span beam with respect to the seismic load (seismic force). The load on the span beam can be reduced. Therefore, by making the beam formation of the second long span beam smaller than the beam formation of the first long span beam, the area of the installation space such as a duct that can be secured under the beam of the second long span beam should be made larger. It is possible to improve the degree of freedom of installation locations such as ducts.

The second characteristic configuration of the present invention is provided with a long span portion having a long column span and a short span portion having a short column span in the first direction of the building.
A long-span beam for joining adjacent columns in the long-span portion and a short-span beam for joining adjacent columns in the short-span portion are provided.
The beam formation of the long-span beam is made smaller than the beam formation of the short-span beam.
In the first direction of the building, a plurality of the long span portions and the long span beams are provided at predetermined intervals.
In the first direction of the building, the long span portions and the short span portions are provided in a state of being alternately arranged, and the long span beams and the short span beams are provided in a state of being alternately arranged. be.

The third characteristic configuration of the present invention is provided with a long span portion having a long column span and a short span portion having a short column span in the first direction of the building.
A long-span beam for joining adjacent columns in the long-span portion and a short-span beam for joining adjacent columns in the short-span portion are provided.
The beam formation of the long-span beam is made smaller than the beam formation of the short-span beam.
In the first direction of the building, a plurality of the long span portions and the long span beams are provided at predetermined intervals.
A pillar-free space without pillars is formed in the building,
The long span portion and the short span portion, and the long span beam and the short span beam are provided on both sides of the pillar-free space in the second direction orthogonal to the first direction of the building .

The fourth characteristic configuration of the present invention is to use a beam that joins adjacent columns in the second direction orthogonal to the first direction of the building, and a haunch beam whose intermediate portion is smaller than the beam formation at both ends. There is a point to do.

According to this configuration, the beam that joins adjacent columns in the second direction is a haunch beam whose intermediate portion is smaller than the beam formation at both ends, so that a duct or the like is provided under the beam of the haunch beam. The installation space can be secured. Therefore, it is possible to secure an installation space for ducts and the like not only in the first direction but also in the second direction, and it is possible to flexibly respond to layout changes of equipment and the like.

Perspective view showing the frame structure of the building Perspective view schematically showing the installation space such as ducts in the frame structure of the building Plan view and side view showing the building in the first embodiment Plan view and side view showing the building in the second embodiment The figure which shows the joining form of a column and a beam in 2nd Embodiment

The frame structure of the building according to the present invention will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 3A, the building 1 is formed in a rectangular shape in a plan view, and the X direction (see FIGS. 1 to 3), which is the first direction, is the longitudinal direction, and the Y is the second direction. The direction (see FIGS. 1 to 3) is the lateral direction. The X direction and the Y direction are two directions along the horizontal direction orthogonal to each other. FIG. 3A shows a plan view of the reference floor of the building 1, and FIG. 3B shows a side view of the building 1.

As shown in FIG. 1, the building 1 uses a frame structure 4 having columns such as a plurality of internal columns 2 and external columns (not shown) and a plurality of beams 3 for joining the columns, and a frame structure of each floor. A slab 5 made of reinforced concrete is constructed on the upper part of the 4. The columns such as the internal columns 2 are made of, for example, square steel pipes, and the beams 3 are made of, for example, H-shaped steel. The columns such as the internal columns 2 and the beams 3 are rigidly joined by welding, bolting, or the like. Regarding the joining between the pillar such as the inner pillar 2 and the beam 3, for example, as shown on the right side in FIG. 5, the web 102 of the beam 3 made of H-shaped steel is attached to the shear plate 103 fixed to the inner pillar 2 by welding or the like. Is bolted together, and the flange 101 of the beam 3 made of H-shaped steel is butt-welded to the diaphragm 100 fixed to the internal column 2 by welding or the like to form a rigid joint.

As shown in FIG. 3, the building 1 is provided with an outer wall portion 6 surrounding the periphery of the building 1, and a plurality of floors (for example, 7 floors) are constructed in the height direction. The building 1 has an overhanging portion 7 in which the outer peripheral portion of the building 1 projects from the middle floor to the outer side of the building 1, and connects the upper end portion and the lower end portion of pillars such as the adjacent internal pillar 2 on the top floor. The brace material 8 is provided. In the building 1, for example, the 2nd to 6th floors are set as the reference floors, and the frame structure 4 on the 2nd to 5th floors will be described below.

As shown in FIGS. 1 and 3, a plurality of internal pillars 2 arranged inside the building 1 are provided at intervals in the X direction and the Y direction. Regarding the column span, in the X direction, a long span portion 9 having a long column span L1 (see FIG. 3) and a short span portion 10 having a short column span L2 (see FIG. 3). And are provided. In the X direction, a plurality of long span portions 9 and short span portions 10 are provided in a state of being alternately arranged.

In the Y direction, as shown in FIGS. 1 and 3A, the internal pillar 2 is not provided on the central side of the building 1, and the internal pillar 2 is provided only on the outer peripheral side portion of the building 1. As a result, the pillar-free space 11 is formed on the central side of the building 1.

Regarding the beam 3, since the long span portion 9 and the short span portion 10 are provided in the X direction, the long span beam 12 for joining the adjacent internal columns 2 in the long span portion 9 and the short span portion 10 A short-span beam 13 that joins adjacent internal columns 2 to each other is provided. In the X direction, a plurality of long-span beams 12 and short-span beams 13 are provided in a state of being alternately arranged. As shown in FIG. 3B, the beam formation M2 of the long span beam 12 is made smaller than the beam formation M1 of the short span beam 13.

In the Y direction, as shown in FIG. 1, the beam 3 for joining the adjacent internal columns 2 is a haunch beam 14 having a beam formation N1 at the intermediate portion 14a smaller than the beam formation N2 at both end portions 14b. For example, the haunch beam 14 is configured by joining the intermediate portion 14a made of the small H-shaped steel of the beam N1 and the both end portions 14b made of the large H-shaped steel of the beam N2 via a joining member or the like. .. Further, in the beam 3 that joins the inner column 2 and the outer column (not shown), the beam formation N3 at the intermediate portion 15a is a haunch beam 15 smaller than the beam formation N4 at the end portion 15b.

The pillar-free space 11 formed in the central portion of the building 1 is used, for example, in a laboratory, a laboratory, or the like, and a plurality of devices such as experimental devices are arranged in the pillar-free space 11. Therefore, since ducts, pipes, and the like in a plurality of devices such as experimental devices are arranged, it is required to secure an installation space for the ducts and the like.

In the X direction, as shown in FIGS. 1 and 3, the column span is adjusted to include the long span beam 12 of the long span portion 9 and the short span beam 13 of the short span portion 10. Due to the difference in length between the long-span beam 12 and the short-span beam 13, the short-span beam 13 has higher rigidity than the long-span beam 12, so that the structure is simple in that the column spans are different. The short-span beam 13 can be heavily burdened with respect to the seismic load (seismic force), and the long-span beam 12 can be less burdened. Therefore, as described above, as shown in FIG. 3B, even if the beam formation M2 of the long span beam 12 is smaller than the beam formation M1 of the short span beam 13, it is possible to appropriately cope with the seismic load. .. Therefore, by making the beam formation M2 of the long span beam 12 smaller than the beam formation M1 of the short span beam 13, as shown in FIG. 2, in the X direction, under the beam of the long span beam 12, a duct 16 or the like is provided. The installation space S1 is secured. Further, in the Y direction, as shown in FIG. 2, the beam 3 for joining the inner pillar 2 is a haunch beam 14, and the beam 3 for joining the inner pillar 2 and the outer pillar (not shown) is also a haunch beam 15. Therefore, not only the intermediate portion 14a of the haunch beam 14 but also the intermediate portion 15a of the haunch beam 15 secures an installation space S2 such as a duct 16 under the beams of the haunch beams 14 and 15.

In this way, the installation spaces S1 and S2 such as the duct 16 can be secured on the lower side of the beam 3 not only in the X direction but also in the Y direction. The duct 16 and the like can be installed while freely adjusting the arrangement position of the duct 16 and the like in the installation spaces S1 and S2 in response to the change of the position and the like. Moreover, since the installation space S1 in the X direction can be secured under the beam of the long span beam 12 having a large column span, a larger installation space S1 can be secured. Further, since the installation space S2 in the Y direction can be secured under the beam of the intermediate portion 14a of the haunch beam 14, the installation space S2 is directly above the center side of the pillarless space 11 in which various devices are arranged. It is also possible to shorten the length of the duct 16 by ensuring the above.

In particular, in the X direction, since a plurality of long-span beams 12 and short-span beams 13 are provided in a state of being arranged alternately, long-span beams 12 can be present at predetermined intervals. Thereby, for example, even if the layout of the device installed in the pillar-free space 11 is changed, the long-span beam 12 can be present near the arrangement position of the device after the layout change. Therefore, it is possible to appropriately secure the installation space S1 such as the duct 16 under the beam of the long span beam 12 while flexibly responding to the layout change of the apparatus.

[Second Embodiment]
This second embodiment is another embodiment of the first embodiment in which the internal column 2 and the beam 3 are joined in the X direction and the structure of the beam 3 is configured. Hereinafter, the joining form of the internal column 2 and the beam 3 in the X direction and the configuration of the beam 3 in the second embodiment will be described with reference to FIGS. 4 and 5, but the other configurations will be described in the first embodiment. Since it is the same as the form, the description thereof will be omitted. FIG. 4A shows a plan view of the reference floor of the building 1, and FIG. 4B shows a side view of the building 1.

In the first embodiment, all of the plurality of long span beams 12 that join the adjacent inner columns 2 to each other in the X direction are rigidly joined as the joining form with the inner columns 2, but as shown in FIG. The first long span beam 12a is provided with a rigid joint between both ends and the internal column 2, and the second long span beam 12b is provided with a pin joint between both ends and the internal column 2. .. In FIG. 4, black circles indicate that the joint between both ends of the second long span beam 12b and the inner column 2 is a pin joint.

Regarding the joining between the first long span beam 12a and the inner pillar 2, for example, as shown on the right side in FIG. 5, the first long span made of H-shaped steel is attached to the shear plate 103 fixed to the inner pillar 2 by welding or the like. The web 102 of the beam 12a is bolted, and the flange 101 of the first long span beam 12a made of H-shaped steel is butt-welded to the diaphragm 100 fixed to the internal column 2 by welding or the like to form a rigid joint. can.

Regarding the joining between the second long span beam 12b and the inner column 2, for example, as shown on the left side in FIG. 5, the flange 104 of the second long span beam 12b made of H-shaped steel and the diaphragm are not joined. Pin joining can be achieved by bolt-joining the web 105 of the second long-spun beam 12b made of H-shaped steel to the shear plate 106 fixed to the inner column 2 by welding or the like.

In this way, since the second long span beam 12b has a pin joint between both ends thereof and the internal column 2, the second long span beam 12b is more rigid than the first long span beam 12a with respect to the seismic load (seismic force). The load on the second long span beam 12b for pin joining can be reduced. Therefore, as shown in FIG. 4B, the beam formation M3 of the second long span beam 12b is made smaller than the beam formation M2 of the first long span beam 12a. As a result, the area of the installation space S1 such as the duct 16 that can be secured under the beam of the second long span beam 12b can be further increased, and the degree of freedom of the installation location of the duct 16 or the like can be improved.

As shown in FIG. 4, a plurality of first long span beams 12a and second long span beams 12b are provided in a state of being alternately arranged in the X direction. In FIG. 4, from the left side in the X direction, the short span beam 13, the second long span beam 12b, the short span beam 13, the first long span beam 12a, the short span beam 13, the second long span beam 12b, and the short span beam 13 , The first long-span beam 12a, the short-span beam 13, the second long-span beam 12b, and the short-span beam 13 are provided in this order. The second long span beam 12b is arranged on both end sides and the center side of the building 1 in the X direction, and a plurality of the second long span beams 12b are provided at predetermined intervals, and the second long span beam 12b is the first long span beam. More than 12a are provided. Therefore, the second long span beam 12b, which can secure a larger installation space as the installation space S1 for the duct 16 and the like, can be present at a predetermined interval in the X direction, so that the layout of the device can be changed flexibly. However, a larger installation space can be secured as the installation space S1 for the duct 16 and the like. Incidentally, the arrangement position and the number of the first long span beam 12a and the second long span beam 12b can be appropriately changed.

Regarding the beam formation of the first long span beam 12a, the second long span beam 12b, and the short span beam 13, the beam formation M1 of the short span beam 13 is the largest, followed by the beam formation M2 of the first long span beam 12a. It is large, and the beam formation M3 of the second long span beam 12b is the smallest (M1> M2> M3). As a result, not only can the installation space S1 of the duct 16 be secured under the long-span beam 12 of both the first long-span beam 12a and the second long-span beam 12b, but also the second long-span beam 12b can be secured. The installation space S1 under the beam can be made larger.

Incidentally, the beam formation of the short span beam 13 can be all the same beam formation, but the beam formation can be changed depending on the arrangement position. For example, in the X direction, the beam formation of the short-span beams 13 arranged on both ends can be made larger than the beam formation of the other short-span beams 13.

[Another Embodiment]
Other embodiments of the present invention will be described. It should be noted that the configurations of the respective embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.
(1) In the above embodiment, an example in which the beam 3 for joining columns such as the internal columns 2 is made of H-shaped steel is shown, but the beam 3 is made of not only H-shaped steel but also other steel materials. You can also do it.

(2) In the above embodiment, as shown in FIG. 5, a configuration using a diaphragm 100 and a shear plate 103 is shown as a configuration for rigidly joining a column such as an internal column 2 and a beam 3. Not limited to the configuration, columns such as the internal column 2 and the beam 3 can be rigidly joined by other configurations.

Further, as a configuration for pin-joining a column such as an internal column 2 and a second long span beam 12b, a configuration using a shear plate 106 is shown as shown in FIG. 5, but the configuration is not limited to this configuration. With another configuration, columns such as the internal column 2 and the second long span beam 12b can be pin-joined.

1 Building 2 Internal pillar (pillar)
3 Beam 4 Frame structure 9 Long span part 10 Short span part 12 Long span beam 12a First long span beam 12b Second long span beam 13 Short span beam 14 Hunch beam 14a Hunch beam intermediate part 14b Both ends of haunch beam M1 Short Beam formation of span beam M2 Beam formation of 1st long span beam M3 Beam formation of 2nd long span beam N1 Beam formation in the middle part of haunch beam N2 Beam formation at both ends of haunch beam

Claims (4)

In the first direction of the building, a long span section with a long column span and a short span section with a short column span are provided.
A long-span beam for joining adjacent columns in the long-span portion and a short-span beam for joining adjacent columns in the short-span portion are provided.
The beam formation of the long-span beam is made smaller than the beam formation of the short-span beam .
In the first direction of the building, a plurality of the long span portions and the long span beams are provided at predetermined intervals.
The plurality of long-span beams include a first long-span beam whose joint between both ends thereof and a column is a rigid joint.
A second long span beam is provided in which the joint between both ends and the column is a pin joint.
A frame structure of a building in which the beam formation of the second long span beam is smaller than the beam formation of the first long span beam . In the first direction of the building, a long span section with a long column span and a short span section with a short column span are provided.
A long-span beam for joining adjacent columns in the long-span portion and a short-span beam for joining adjacent columns in the short-span portion are provided.
The beam formation of the long-span beam is made smaller than the beam formation of the short-span beam.
In the first direction of the building, a plurality of the long span portions and the long span beams are provided at predetermined intervals.
In the first direction of the building, the long-span portion and the short-span portion are provided in a state of being alternately arranged, and the long-span beam and the short-span beam are provided in a state of being alternately arranged . Frame structure. In the first direction of the building, a long span section with a long column span and a short span section with a short column span are provided.
A long-span beam for joining adjacent columns in the long-span portion and a short-span beam for joining adjacent columns in the short-span portion are provided.
The beam formation of the long-span beam is made smaller than the beam formation of the short-span beam.
In the first direction of the building, a plurality of the long span portions and the long span beams are provided at predetermined intervals.
A pillar-free space without pillars is formed in the building,
A frame structure of a building in which the long span portion and the short span portion, and the long span beam and the short span beam are provided on both sides of a pillar-free space in a second direction orthogonal to the first direction of the building. Any of claims 1 to 3, wherein the beam joining adjacent columns in the second direction orthogonal to the first direction of the building is a haunch beam whose beam formation at the intermediate portion thereof is smaller than the beam formation at both ends. The frame structure of the building described in item 1.

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