Canopy structure and method for manufacturing a canopy structure

Abstract

To provide an eaves structure capable of absorbing thermal expansion in an eaves longitudinal direction at a tip side of a steel beam structure portion while reducing processing costs and suppressing construction errors.SOLUTION: The eaves structure includes a steel beam structure portion 3 supported in a cantilever manner by a cantilever beam 8 on a plurality of columns. The steel beam structure portion 3 is divided into a plurality of divided beam structure portions 7 in an eaves longitudinal direction X. The cantilever beam 8 located at a boundary portion 3A where the steel beam structure portion 3 is divided and connected to a column 2 is composed of two cantilever-like beam members 8A, 8B arranged side by side with a gap G therebetween that allows thermal expansion of the steel beam structure portion 3.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to an eave structure including a steel frame beam structure portion that is cantilever-supported by a plurality of columns.

Background Art

[0002] Patent Document 1 discloses an eave structure including a steel frame beam structure portion that is cantilever-supported by a plurality of columns 95 in a building 100. In the eave structure of Patent Document 1, the steel frame beam structure portion is configured to include a large beam 10 cantilever-connected to the columns 95, and a small beam 20 extending along the longitudinal direction of the eave, and the distal end side end portion of the large beam 10 and the end portion of the small beam 20 in the longitudinal direction of the eave are connected by using an easily deformable connecting member 50.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] As described above, when the steel frame beam structure portion is cantilever-supported by the plurality of columns 95, the base side of the steel frame beam structure portion is joined to the columns 95 of the building 100 and thus hardly undergoes thermal elongation in the longitudinal direction of the eave, while the distal end side of the steel frame beam structure portion is not joined to the columns 95 or the like and thus easily undergoes thermal elongation in the longitudinal direction of the eave. Therefore, in the eave structure of Patent Document 1, by connecting the large beam 10 and the small beam 20 using the connecting member 50 on the distal end side of the steel frame beam structure portion, the end portions of the large beam 10 and the small beam 20 are connected in a relatively movable state while a gap is formed between the large beam 10 and the small beam 20, and the connecting member 50 is configured to absorb the thermal elongation in the longitudinal direction of the eave on the distal end side of the steel frame beam structure portion.

[0005] Furthermore, in a canopy structure equipped with the steel beam structure described above, it is conceivable to divide the steel beam structure into multiple segmented beam structures in the longitudinal direction of the canopy and connect adjacent segmented beam structures with expansion joints to absorb the thermal expansion of the steel beam structure.

[0006] However, using easily deformable connecting members 50 or expansion joints could lead to increased processing costs and construction errors due to complex fittings.

[0007] In light of these circumstances, the main objective of the present invention is to provide a canopy structure that can absorb thermal expansion in the longitudinal direction of the canopy at the tip of the steel beam structure while reducing processing costs and minimizing construction errors. [Means for solving the problem]

[0008] The first characteristic configuration of the present invention is an overhang structure comprising a steel beam structure that is cantilevered by cantilever beams on multiple columns, The direction in which the aforementioned multiple columns are aligned is defined as the longitudinal direction of the canopy. The steel beam structure is divided into a plurality of segmented beam structures in the longitudinal direction of the canopy. Located at the boundary where the aforementioned steel beam structure is divided 1 The key feature is that the cantilever beam connected to the column is composed of two cantilevered beam members arranged with a gap that allows for thermal expansion of the steel beam structure.

[0009] In this configuration, the cantilever beam at the boundary of the steel beam structure is composed of two cantilevered beam members arranged with a gap that allows for thermal expansion of the steel beam structure. As a result, the beam members flex in the longitudinal direction of the canopy, which can absorb thermal expansion in the longitudinal direction of the canopy, mainly at the tip of the steel beam structure. Furthermore, as described above, by constructing the cantilever beam located at the boundary of the steel beam structure with two beam members, it is possible to absorb the thermal expansion in the longitudinal direction of the canopy of the steel beam structure at the boundary, while eliminating the need to install expansion joints or the like at intermediate points in the longitudinal direction of the canopy of the steel beam structure. This reduces increased processing costs and construction errors due to complex fittings.

[0010] A second characteristic configuration of the present invention is that one of the two beam members is designated as the first beam member and the other as the second beam member, and the side of the second beam member in the longitudinal direction of the canopy where the first beam member exists is designated as the first side in the longitudinal direction of the canopy, and the opposite side is designated as the second side in the longitudinal direction of the canopy. The cantilever beam located outside the aforementioned boundary is formed of H-shaped steel, The first beam member is formed from a steel material with a U-shaped cross-section having a web and upper and lower flanges on the first side in the longitudinal direction of the canopy. The second beam member is formed from a steel material with a U-shaped cross-section, having a web and upper and lower flanges on the second side in the longitudinal direction of the canopy.

[0011] According to this configuration, by forming each of the two beam members at the boundary of the steel beam structure with a U-shaped cross-section steel material having a web and a flange on the first side in the longitudinal direction of the canopy or the second side in the longitudinal direction of the canopy, the combined shape of the two beam members does not differ significantly from that of an H-shaped steel, thus eliminating the need to significantly change the shape of the surrounding members.

[0012] The third characteristic configuration of the present invention is: A method for manufacturing an awning structure, The first beam member is formed by cutting off the upper and lower flanges on the second side in the longitudinal direction of the canopy of an H-shaped steel that constitutes one of the cantilever beams located other than the boundary portion. The second beam member is an H-shaped steel that constitutes one of the cantilever beams located outside the boundary portion. The upper and lower flanges on the first side in the longitudinal direction of the canopy are cut off to form the above be It's at a single point.

[0013] According to this configuration, the first beam member and the second beam member can be formed by cutting off the flange on one side in the eaves longitudinal direction of the H-section steel, so that the H-section steel can be used effectively, and the cross-sectional performance equal to or higher than that of a cantilever formed of a single H-section steel can be achieved. Brief Description of the Drawings

[0014] [Figure 1] Plan view of a building having an eaves structure [Figure 2] Plan view showing a boundary portion where the steel beam structure is divided [Figure 3] Perspective view showing a boundary portion where the steel beam structure is divided [Figure 4] Plan view showing an end portion of the steel beam structure [Figure 5] Front view showing a cantilever located at a boundary portion [Figure 6] Diagram showing a state in which upper and lower flanges on the first side in the eaves longitudinal direction of the H-section steel are cut off [Figure 7] Plan view showing a joint portion between a cantilever located at a boundary portion and a column Modes for Carrying Out the Invention

[0015] An embodiment of the eaves structure according to the present invention will be described based on the drawings. As shown in Figure 1, the eaves structure 1 includes a steel beam structure 3 that is cantilever-supported by a plurality of columns 2. The eaves structure 1 further includes a roof portion 4 supported by the steel beam structure 3 so as to cover the upper side of the steel beam structure 3, and the roof portion 4 is configured by, for example, a folded-plate roof or the like. In addition, in Figure 1, the columns 2 and the steel beam structure 3 are indicated by broken lines. In the present embodiment, the eaves structure 1 is cantilever-supported by the columns 2 on the outer peripheral portion of the building 5 so as to project substantially horizontally from the outer wall of the building 5 toward the outer side Y1, and is installed along the outer wall of the building 5.

[0016] Next, we will describe the steel beam structure 3 and the beams that constitute the steel beam structure 3. Hereinafter, the direction in which multiple columns 2 are lined up will be referred to as the canopy longitudinal direction X, one side of the canopy longitudinal direction X will be referred to as the canopy longitudinal direction first side X1, and the opposite side as the canopy longitudinal direction second side X2. Furthermore, the direction in which the cantilever beam 8, which will be described later, extends will be referred to as the interior-exterior direction Y, and the side on which the cantilever beam 8 exists relative to the columns 2 in the interior-exterior direction Y will be referred to as the exterior side Y1, and the opposite side as the interior side Y2. Note that the canopy longitudinal direction X is perpendicular to the interior-exterior direction Y when viewed in the vertical direction.

[0017] As shown in Figure 2, the steel beam structure 3 is cantilevered by cantilever beams 8 on multiple columns 2. Also, as shown in Figure 1, the steel beam structure 3 is divided into multiple segmented beam structures 7 in the longitudinal direction X of the canopy. In this embodiment, the steel beam structure 3 is divided into three segmented beam structures 7. Figure 2 is a plan view of the boundary 3A where the steel beam structure 3 is divided, and Figure 3 is a perspective view of the boundary 3A where the steel beam structure 3 is divided. Figure 4 is a plan view of the end of the steel beam structure 3 on the second side X2 in the longitudinal direction of the canopy. As shown in Figures 2 to 4, the divided beam structure 7 includes a cantilever beam 8 connected to the column 2 in a cantilever manner along the inward-outward direction Y, a first secondary beam 9 installed along the longitudinal direction X of the canopy with its end connected to the cantilever beam 8, a second secondary beam 10 installed along the inward-outward direction Y with its end connected to the first secondary beam 9, and a brace 11 for reinforcing the divided beam structure 7.

[0018] As shown in Figures 2 to 4, a cantilever beam 8 is provided at the boundary 3A where the steel beam structure 3 is divided, and is supported in a cantilever manner by the column 2. In addition, cantilever beams 8 are also provided at locations other than the boundary 3A of the steel beam structure 3. As shown in Figures 2 and 3, the cantilever beam 8, located at the boundary 3A where the steel beam structure 3 is divided and connected to the column 2, is composed of two cantilevered beam members 8A and 8B arranged side by side with a gap G that allows for thermal expansion of the steel beam structure 3.

[0019] To elaborate, boundary section 3A includes the boundary side ends (first side X1 in the longitudinal direction of the canopy or second side X2 in the longitudinal direction of the canopy) of the two divided beam structural sections 7 that are divided at boundary section 3A. Of the two divided beam structural sections 7, the boundary side end (second side X2 in the longitudinal direction of the canopy) of the divided beam structural section 7 located on the first side X1 in the longitudinal direction of the canopy is provided with a beam member 8A (hereinafter sometimes referred to as the first beam member 8A), and the boundary side end (first side X1 in the longitudinal direction of the canopy) of the divided beam structural section 7 located on the second side X2 in the longitudinal direction of the canopy is provided with a beam member 8B (hereinafter sometimes referred to as the second beam member 8B). In other words, these first beam member 8A and second beam member 8B are located at boundary section 3A, and together they constitute a cantilever beam 8 located at boundary section 3A. Thus, one of the two beam members 8A and 8B located at the boundary 3A is designated as the first beam member 8A, and the other as the second beam member 8B.

[0020] As shown in Figure 3, a gap G is formed between the first beam member 8A and the second beam member 8B to allow thermal expansion of the steel beam structure 3. The gap G that allows thermal expansion of the steel beam structure 3 is set based on the length of the canopy longitudinal direction X of the divided beam structure 7, the material of the divided beam structure 7, and the expected temperature changes. In other words, the gap G is set so that even if the divided beam structure 7 undergoes thermal expansion in the canopy longitudinal direction X due to temperature changes within the expected range, the first beam member 8A and the second beam member 8B will not come into contact. As shown in Figure 5, the gap G is set to be narrower than the width (beam width) of the canopy longitudinal direction X of the first beam member 8A and the second beam member 8B, and is set to about half the width of the canopy longitudinal direction X of the first beam member 8A and the second beam member 8B.

[0021] The cantilever beam 8 located outside of the boundary section 3A (hereinafter sometimes referred to as the third beam member 8C) is made of H-shaped steel. In other words, the cantilever beam 8 located in the center of the canopy's longitudinal direction X of the divided beam structure 7 is not located at the boundary 3A. Also, as shown in Figure 4, the cantilever beam 8 located at the end of the canopy's longitudinal direction X of the divided beam structure 7, but also at the end of the canopy's longitudinal direction X of the steel beam structure 3, is not located at the boundary 3A. The cantilever beams 8 located in the center of the canopy longitudinal direction X of these divided beam structural parts 7, and the cantilever beams 8 located at the ends of the canopy longitudinal direction X of the steel beam structural part 3, which are located at the ends of the canopy longitudinal direction X of the divided beam structural part 7, correspond to the third beam members 8C located outside the boundary part 3A, and are formed of H-shaped steel.

[0022] As shown in Figure 5, the first beam member 8A is formed of a steel material with a U-shaped cross-section having a web 13 and upper and lower flanges 14 on the first side X1 in the longitudinal direction of the canopy, and the second beam member 8B is formed of a steel material with a U-shaped cross-section having a web 13 and upper and lower flanges 14 on the second side X2 in the longitudinal direction of the canopy. Specifically, as shown in Figure 6, the second beam member 8B is formed by cutting off the upper and lower flanges 14 of the first side X1 in the longitudinal direction of the canopy of an H-shaped steel that constitutes a cantilever beam 8 (third beam member 8C) located outside the boundary 3A. Although not shown in the diagram, the first beam member 8A is formed by cutting off the upper and lower flanges 14 on the second side X2 in the longitudinal direction of the canopy of an H-shaped steel that constitutes a cantilever beam 8 (third beam member 8C) located outside the boundary 3A. As described above, the first beam member 8A and the second beam member 8B are formed by cutting off one flange 14 in the longitudinal direction X of the canopy of the H-shaped steel that constitutes the third beam member 8C. Therefore, the beam depth of the first beam member 8A and the second beam member 8B is the same as the beam depth of the third beam member 8C, and the beam width of the first beam member 8A and the second beam member 8B is narrower than the beam width of the third beam member 8C by the width of the cut-off flange 14. However, since both the first beam member 8A and the second beam member 8B have webs 13, the combined cross-section of the first beam member 8A and the second beam member 8B is slightly larger than that of the third beam member 8C (H-shaped steel). Therefore, similar to the third beam member 8C, the load at the boundary 3A can be appropriately transmitted to a single column 2.

[0023] As shown in Figure 7, the column 2 is made of a rectangular steel pipe 16 and is equipped with a pair of diaphragms 17 at a predetermined interval in the vertical direction. The diaphragms 17 have an outer shape slightly larger than the outer circumference of the rectangular steel pipe 16, and the upper flange 14 of the cantilever beam 8 is joined to the upper diaphragm 17 by welding or bolts, and the lower flange 14 of the cantilever beam 8 is joined to the lower diaphragm 17 of the column 2 by welding or bolts.

[0024] To elaborate on the connection of the first beam member 8A and the second beam member 8B to the column 2, the width X in the longitudinal direction of the canopy of the pair of diaphragms 17 is set to be greater than or equal to the sum of the beam widths of the two beam members 8A and 8B (first beam member 8A and second beam member 8B) located at the boundary 3A plus the gap G formed between these two beam members 8A and 8B. The flange 14 of the first beam member 8A is joined to the first side X1 in the longitudinal direction of the canopy of the diaphragm 17, and the flange 14 of the second beam member 8B is joined to the second side X2 in the longitudinal direction of the canopy of the diaphragm 17. In this way, by joining the first beam member 8A and the second beam member 8B located at the boundary 3A to the same diaphragm 17, the first beam member 8A and the second beam member 8B are joined to a single column 2. Although not shown in the diagram, the web 13 of the first beam member 8A and the web 13 of the second beam member 8B are joined to the portion between the pair of diaphragms 17 in the column 2.

[0025] Although not shown in the diagram, for the third beam member 8C, the upper flange 14 of the third beam member 8C is joined to the upper diaphragm 17, the lower flange 14 of the third beam member 8C is joined to the lower diaphragm 17, and the web 13 of the third beam member 8C is joined to the portion between the pair of diaphragms 17 in the column 2. In this embodiment, the diaphragm 17 to which the third beam member 8C is joined is the same size as the diaphragm 17 to which the first beam member 8A and the second beam member 8B are joined, but a diaphragm 17 with a smaller width in the longitudinal direction X of the canopy than the diaphragm 17 to which the first beam member 8A and the second beam member 8B are joined may also be used.

[0026] As shown in Figure 3, the cantilever beam 8 is provided with a gusset plate 18 made of steel plate or the like. The gusset plate 18 is positioned between the upper flange 14 and the lower flange 14 of the cantilever beam 8, and is joined to the upper flange 14, the lower flange 14, and the web 13 by welding or the like. Furthermore, the gusset plate 18 has a portion that protrudes from the cantilever beam 8 toward the side where the first secondary beam 9 is located in the longitudinal direction X of the canopy, and the web 13 of the first secondary beam 9 is bolted to this protruding portion of the gusset plate 18. The first beam member 8A and the second beam member 8B have a shape in which one flange 14 in the longitudinal direction X of the canopy is cut off, but since the first secondary beam 9 is joined to the side that has the flange 14, the first secondary beam 9 can be joined in the same way as the third beam member 8C which is made of H-shaped steel.

[0027] As described above, the cantilever beam 8 located at the boundary 3A where the steel beam structure 3 is divided is constructed of two beam members 8A and 8B arranged with a gap G that allows for thermal expansion of the steel beam structure 3. By allowing the beam members 8A and 8B to flex in the longitudinal direction X of the canopy, the thermal expansion in the longitudinal direction X of the canopy, mainly at the tip of the steel beam structure 3, can be absorbed. Furthermore, by constructing the cantilever beam 8 located at the boundary 3A of the steel beam structure 3 with two beam members 8A and 8B arranged side by side with a gap G between them, it is possible to absorb the thermal expansion in the longitudinal direction X of the canopy of the steel beam structure 3 at the boundary 3A, while suppressing increased processing costs and construction errors due to complex fittings.

[0028] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

[0029] (1) In the above embodiment, an example was described in which the first beam member 8A and the second beam member 8B are formed from beam members with a U-shaped cross-section having a web 13 of an H-shaped steel and upper and lower flanges 14 on one side in the longitudinal direction X of the canopy. However, the configuration is not limited to this. For example, one or both of the first beam member 8A and the second beam member 8B may be formed from beam members other than those with a U-shaped cross-section, such as H-shaped steel or square steel pipes, and channel steel may be used as the steel material with a U-shaped cross-section. [Explanation of Symbols]

[0030] 1. Canopy structure 2 pillars 3. Steel beam structure 3A Boundary 7 Split beam structure 8. Cantilever beam 8A First beam member (one of two beam members) 8B Second beam member (the remaining of the two beam members) 8C Third beam member (cantilever beam located outside the boundary) 13 Web 14 Flange G Gap X Eave longitudinal direction X1 First side of eave longitudinal direction X2 2nd longitudinal side of eave

Claims

1. An overhang structure comprising a steel beam structure supported in a cantilevered manner by cantilever beams on multiple columns, The direction in which the aforementioned multiple columns are aligned is defined as the longitudinal direction of the canopy. The steel beam structure is divided into a plurality of segmented beam structures in the longitudinal direction of the canopy. An overhang structure in which the cantilever beam located at the boundary where the steel beam structure is divided and connected to one of the columns is composed of two cantilevered beam members arranged with a gap that allows for thermal expansion of the steel beam structure.

2. One of the two beam members is designated as the first beam member, and the other as the second beam member. The side of the second beam member in the longitudinal direction of the canopy where the first beam member exists is designated as the first side in the longitudinal direction of the canopy, and the opposite side is designated as the second side in the longitudinal direction of the canopy. The cantilever beam located outside the aforementioned boundary is formed of H-shaped steel, The first beam member is formed from a steel material with a U-shaped cross-section having a web and upper and lower flanges on the first side in the longitudinal direction of the canopy. The canopy structure according to claim 1, wherein the second beam member is formed of a steel material having a U-shaped cross-section with a web and upper and lower flanges on the second side in the longitudinal direction of the canopy.

3. A method for manufacturing the canopy structure according to Claim 2, The first beam member is formed by cutting off the upper and lower flanges on the second side in the longitudinal direction of the canopy of an H-shaped steel that constitutes one of the cantilever beams located other than the boundary portion. The method for manufacturing a canopy structure is to cut off the upper and lower flanges on the first side in the longitudinal direction of the canopy of an H-shaped steel that constitutes one of the cantilever beams located other than the boundary portion.

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