JP2017110425A - building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an astylar space under a beam by using a structurally-simple support.SOLUTION: A building 10 includes: a pair of supports 20; a beam 30 that comprises a double end support beam 32 installed across the supports 20 and positioned between the supports 20, and a cantilever beam 34 overhanging to the outside of the support 20; an inside diagonal member (brace 50) for connecting the supports 20 and the double end support beam 32 together; and an outside diagonal member (brace 52) for connecting the supports 20 and the cantilever beam 34 together.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a building.

  Patent Document 1 below discloses that a beam having both ends erected on support columns at both ends of a building is suspended from the support column by a V-shaped brace to form a column-free space below the beam.

JP-A-4-153424

  However, according to the above-mentioned Patent Document 1, in order to withstand the bending force caused by the braces, the support column portion has a strong structure in which four support columns are connected by braces, which takes time and effort.

  In view of the above fact, the present invention has an object to form a column-free space under a beam using a strut having a simple structure.

  The building according to claim 1 is a beam comprising a pair of columns, a both-end support beam installed between the columns and positioned between the columns, and a cantilever beam extending outside the column, and the column. An inner diagonal member that connects the both-end support beams, and an outer diagonal member that connects the support column and the cantilever beam.

  According to the building of the first aspect, the both-end support beam between the columns and the cantilever beam outside the column are connected to the column by the inner diagonal member and the outer diagonal member, respectively. For this reason, compared with the structure which does not have a cantilever on the outer side of a support | pillar, the load which a support | pillar bears is not biased inside, ie, between support | pillars, and load balance is good. Further, since a bending moment hardly acts on the support column at normal times, the support column can have a simple structure that only bears an axial force.

  Further, since the inner diagonal member and the outer diagonal member need only bear the tensile force, the cross-sectional dimension can be reduced.

  In addition, since the both-end support beam and the cantilever beam are supported by the column through the inner diagonal member and the outer diagonal member, it is not necessary to support the beam by a column other than the column. For this reason, a column-free space can be formed below the beam.

  A building according to a second aspect is the building according to the first aspect, further comprising a lower structure suspended from the cantilever.

  According to the building of claim 2, when the building weight supported by the cantilever is small compared to the weight of the building supported by the both-end support beam, the lower structure is suspended by the cantilever to Such a load can be balanced.

  The building according to claim 3 is the building according to claim 1 or 2, wherein a seismic isolation device is provided between the support column and the foundation.

  According to the building of Claim 3, since there is no column which supports a beam, a building can be made into a seismic isolation structure only by providing a seismic isolation device between a support | pillar and a base part. For this reason, the number of seismic isolation devices can be reduced.

  According to the building which concerns on this invention, a column-free space can be formed under a beam using the support | pillar of a simple structure.

(A) is the elevation which showed the building which concerns on embodiment of this invention, (B) is the partial elevation which showed the lower end part of the support | pillar. It is the fragmentary sectional view which showed the relationship between the column beam joint part and brace of the building which concerns on embodiment of this invention. It is the exploded elevation view which exploded and showed the column beam joint part and brace of the building concerning the embodiment of the present invention. It is the 1st floor top view of the building concerning the embodiment of the present invention. It is the elevation which showed the columnar space of the building which concerns on embodiment of this invention. It is the elevation which showed the modification of the building which concerns on embodiment of this invention, (A) is the structure which balanced the number of structures of the right and left of a support | pillar, (B) is a heavy object for balance to a cantilever. A suspended configuration, (C) has three struts, a configuration in which the lower structure is suspended from a cantilever beam, and (D) shows a configuration in which the lower structure is suspended from both end support beams.

(building)
Hereinafter, a building 10 as an example of an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1A and 4, the front surface 10 </ b> A of the building 10 according to the present embodiment includes a pair of support columns 20 erected from the footing foundation 12 and a plurality of beams 30 installed in the vertical direction of the support columns 20. And. The beam 30 includes a both-end support beam 32 positioned between the columns 20 and a cantilever beam 34 protruding to the outside of the column 20. Further, the support column 20 and the both-end support beam 32 are connected by a brace 50, and the support column 20 and the cantilever beam 34 are also connected by a brace 52.

  Thereby, the building 10 has the both-end support beam 32 and the cantilever beam 34 suspended from the support column 20 via the braces 50 and 52, respectively.

(Support)
As shown in FIG. 1B, the support column 20 is a concrete-filled steel pipe (CFT), and a seismic isolation device 14 is installed between the support column 20 and the footing foundation 12. The lower flange 14 </ b> A of the seismic isolation device 14 is bolted to the footing foundation 12, and the upper flange 14 </ b> B is fixed to the leg portion of the column 20 with bolts. As a result, the support column 20 is supported in isolation from the footing foundation 12.

(Beam)
The beams 30 (both end support beams 32 and cantilever beams 34) are H-shaped steel, and as shown in FIG. Specifically, three are installed as floor beams for supporting the floor slabs of the second floor, the third floor, and the fourth floor of the building 10. A ceiling beam 31 that supports the roof slab of the building 10 is disposed above the beam 30.

  From the beam 30 on the second floor, columns 60 are erected at a constant pitch. The column 60 is joined to the beam 30 and the ceiling beam 31, the front surface 10 </ b> A has 18 vertical surfaces (6 spans × 3 layers) between the columns 20, and the outside of the columns 20 has 6 surfaces (2 spans × A three-layer vertical surface is formed. Note that the construction surface refers to a portion surrounded by column beams. In addition, floor slabs (not shown) are placed on both end support beams 32 and cantilever beams 34, respectively.

(Brace)
The brace 50 is disposed obliquely from the upper end portion of the support column 20 to the central portion of the lowermost both end support beams 32 and is joined to the both ends support beams 32 and the joints of the columns 60 in each floor.

  As shown in FIG. 2, the brace 50 includes a shaft member 54 and a connecting member 56 that connects the shaft members 54 to each other. The shaft member 54 is an H-shaped steel, and the connecting member 56 is composed of a connecting plate 56C joined to the end of the shaft member 54 and an H-shaped steel joined to the connecting plate 56C. The H-shaped steel constituting the connecting member 56 is formed such that the center portion is larger than the end portion, so that the ends of the both-end support beam 32 and the column 60 are accommodated between the upper and lower flanges 56B. , Both end support beams 32 and columns 60 are joined.

  FIG. 3 shows an exploded view of the joint between the both-end support beam 32, the column 60, and the brace 50. As shown in FIG. 3, the brace 50 is a threading member, and the divided columns 60 and both-end support beams 32 are welded to the flanges 56 </ b> B of the connecting members 56, respectively.

  A flange 33 </ b> B is welded to the web 56 </ b> A of the connecting member 56 on an extension line of the flange 32 </ b> B of the both-end support beam 32. Further, both end portions of the flange 33 </ b> B are welded to the flange 56 </ b> B of the connecting member 56.

  Between the upper and lower flanges 33 </ b> B, a half member 60 </ b> A in which the cylindrical column 60 is divided in the axial direction is disposed and welded to the web 56 </ b> A of the connecting member 56. The upper and lower ends of the half-split material 60A are welded to the flange 33B.

  Further, in the triangular gap formed between the flange 33B and the flange 56B, a half member 60B in which the pillar 60 is divided in the axial direction and processed into a triangular shape in front view is disposed, and the web Welded to 56A. Further, one end of the half-split material 60B is welded to the flange 56B, and the other end is welded to the flange 33B.

  The brace 52 is disposed obliquely from the upper end of the support column 20 to the end of the cantilever 34 on the third floor, and is joined to both ends of the support beams 32 on the fourth floor and the joints of the columns 60. In addition, the joint structure of the cantilever 34, the pillar 60, and the brace 52 is the same as that of the brace 50, and description thereof is omitted. Also, braces are diagonally arranged from the portion other than the upper end portion of the column 20 (the junction between the beam 30 on the third floor and the fourth floor and the column 20) to the beam 30 on the second floor.

(Substructure)
A suspension beam 70 as an example of the lower structure of the present invention is suspended from the cantilever 34 via a connecting column 72, and a floor slab (not shown) is placed on the suspension beam 70. The first floor part is formed. That is, the load on the first floor portion of the building 10 is supported by being suspended by the cantilever 34. One end of the suspension beam 70 (end on the outside of the building 10) is joined to the connecting column 72, and the other end (end on the inside of the building 10) is joined to the support column 20. Yes. As a result, in the first floor portion of the front surface 10A of the building 10, two vertical surfaces are formed on the outside of the support column 20, and the load on the outside of the support column 20 is less than that of the configuration without the lower structure. It has increased.

  In a portion other than the front surface 10A of the building 10, that is, an inner portion of the building 10 (portion above the front surface 10A in FIG. 4), as shown in FIG. There is no brace. The pillar 80 is placed on the seismic isolation device 14 fixed to the footing foundation 12 in the same manner as the support 20, and the first floor portion is a pillared space.

  As shown in FIG. 4, the outer wall 16 of the first floor portion of the building 10 is formed in the portion from the connecting column 72 to the column 20 at the left and right ends of the building 10 in the front surface 10A, and the space between the columns 20 is open. Yes. Inside the opening, an outer wall 18 is formed from the column 20 to the column 80 toward the back of the building 10. Further, a shutter 84 is installed on the vertical plane between the beam 82 and the column 80 between the left and right outer walls 18.

  The slab 74 on the first floor portion of the building 10 projects from the outer wall 18 and the shutter 84 toward the outside of the building 10 and serves as a work table for handling cargo.

(Column-free space)
As described above, the both end support beams 32 are suspended from the support column 20 via the brace 50. For this reason, it is not necessary to provide a column below the both-end support beam 32, and a column-free space V is provided. The columnless space V is a semi-outdoor space with one surface open to the outdoors. Further, the building 10 is provided with a fence H so as to surround the columnar space V.

(Function and effect)
In the building 10 of the present embodiment, both end support beams 32 are connected to the column 20, and cantilever beams 34 are connected to both ends of the both end support beams 32. Therefore, as compared with the configuration without the cantilever 34, the load borne by the column 20 is not biased to one side (between the columns 20), and the column 20 only has to bear the axial force. Good.

  In addition, the building 10 of this embodiment has an eight-plane vertical structure in which two vertical 20 planes are added to the inner side of the two columns 20 and two sides of the first floor are added to the six sides of the second and higher floors. By providing the surface, the load supported by the support column 20 is balanced.

  Moreover, since the support | pillar 20 of this embodiment receives tensile force from both the inner side brace 50 and the outer side brace 52, it is hard to act on a bending moment. For this reason, the support | pillar 20 should just bear a compressive force mainly, and can support the support | pillar 20 with a simple structure. Therefore, although the support | pillar 20 is made into a concrete filling steel pipe in this embodiment, embodiment of this invention should just be set as the structure which can bear compressive force, such as a reinforced concrete pillar or a concrete pillar, for example.

  Further, the braces 50 and 52 need only bear the tensile force and do not need to consider the compressive force. For this reason, the member cross section of the braces 50 and 52 can be made small, and it is easy to light the inside of the building 10. In the present embodiment, the braces 50 and 52 are made of H-shaped steel, but they may be steel cables or carbon fiber cables that can bear the tensile force.

  Moreover, in the building 10 of this embodiment, the both-ends support beam 32 between the two support | pillars 20 is suspended and supported by the support | pillar 20 with the brace 50, and needs to be supported by another pillar from the downward direction. Absent. For this reason, the column-free space V can be formed below the both-end support beams 32. Therefore, for example, a large truck can travel without being disturbed by a pillar, and can park and stop in any direction such as a direction along the front surface 10A of the building 10 or a direction orthogonal to the front surface 10A. For this reason, it is possible to cope with both loading and unloading from the back of the large truck and loading from the side. Moreover, since there is no pillar, the parking space increases, so the number of vehicles that can be parked at the same time can be increased, and the handling ability is high.

  The columnar space V is a semi-outdoor space with the top covered. For this reason, the columnar space V can surpass wind and rain. Thus, the building 10 of the present embodiment is suitable for use as a warehouse or the like having a truck berth.

  Moreover, as shown in FIG. 2, since the brace 50 of this embodiment is a through member in the joint portion of the column 60 and the both-end support beam 32, the tensile force is higher than that in the case where it is divided. It is transmitted smoothly.

  Further, the flange 33B and the half-split materials 60A and 60B are welded to the web 56A of the connecting member 56 of the brace 50. Further, the flange 33B is welded to the flange 56B of the connecting member 56, the half member 60A is welded to the flange 33B, and the half member 60B is welded to the flange 56B and the flange 33B. Thereby, the axial force which acts on one divided | segmented both-ends support beam 32 and column 60 can be transmitted to the other both-ends support beam 32 and column 60, respectively. Further, the bending moment generated in the both-end support beam 32 can be transmitted to the column 60. For this reason, the proof stress of the joint part of the pillar 60 and the both ends support beam 32 is not impaired.

  In addition, since the both-end support beam 32 and the cantilever beam 34 are suspended and supported by the support column 20 and there are no columns below the both-end support beam 32 and the cantilever beam 34, a footing foundation is provided on the front surface 10 </ b> A of the building 10. Only two of the columns 20 are erected. For this reason, two seismic isolation devices may be provided. Thus, the number of the seismic isolation devices 14 can be reduced by making the building 10 into a cable-stayed bridge configuration.

(Modification)
Next, a modification of the above embodiment will be described. In the said embodiment, the 1st floor part was suspended from the cantilever 34, and the load balance which the support | pillar 20 bears was taken, However, Embodiment of this invention is not restricted to this.

  For example, as shown in FIG. 6 (A), the cantilever length of the cantilever 34 may be lengthened to increase the vertical load, thereby balancing the load that the column 20 bears. In this way, since it is not necessary to suspend the lower structure on the cantilever 34, not only the columnar space V below the both-end support beam 32 but also the columnar space below the cantilever 34. V1 can be formed.

  Or when the take-out length of the cantilever 34 cannot be increased, for example, when the site area is not enough, as shown in FIG. A large structure C may be suspended to balance the left and right loads that the support column 20 bears. Alternatively, the floor slab placed on the cantilever 34 may be thickened to increase the weight that the cantilever 34 bears. Even with such a configuration, the columnar space V <b> 2 can be formed below the cantilever 34.

  Moreover, in the said embodiment, although the support | pillar 20 was comprised by two, embodiment of this invention is not restricted to this. For example, as shown in FIG. 6C, three or more struts 20 may be provided. In this way, two or more columnar spaces V can be provided.

  Moreover, in the said embodiment, although the load of the outer side of the support | pillar 20 was increased and the load balance which the support | pillar 20 bears was taken, embodiment of this invention is not restricted to this. For example, as shown in FIG. 6D, when the outer load is larger than the inner load supported by the support column 20, the first floor portion may be hung from the inner end support beams 32. . In this way, the columnar space V <b> 1 can be formed below the cantilever 34.

  In the above-described embodiment, the suspension structure including the support column 20, the beam 30 (both end support beams 32 and the cantilever beam 34) and the braces 50 and 52 is configured such that the first floor slab 74 is suspended and supported by the cantilever beam 34. The columnar space V is applied only to the front surface 10A of the building 10, but the embodiment of the present invention is not limited to this. For example, in addition to the front surface 10 </ b> A, a columnar space V may be expanded with the same configuration on the inner side of the front surface 10 </ b> A (the portion on the upper side of the drawing in FIG. 4). Alternatively, a column-free space may be configured by applying the same configuration to a portion not including the front surface 10 </ b> A, that is, the inside of the building 10.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment, You may use suitably combining one embodiment and various modifications, and deviates from the summary of this invention. In the range which does not carry out, it can implement in a various aspect.

10 Building 12 Footing foundation (foundation)
14 Seismic isolation device 20 Post 30 Beam 32 Both ends support beam 34 Cantilever 50 Brace (inner diagonal)
52 Brace (outer diagonal)
70 Foundation beam (understructure)

Claims (3)

A pair of struts;
A beam provided on both ends of the column, and both end support beams positioned between the columns, and a cantilever beam extending to the outside of the column;
An inner diagonal connecting the support and the both-end support beams;
An outer diagonal connecting the post and the cantilever;
Building with.   The building according to claim 1, further comprising a lower structure suspended from the cantilever.   The building of Claim 1 or Claim 2 which provided the seismic isolation apparatus between the said support | pillar and a base part.