Frame

Abstract

To suppress deformation of a roof frame that protrudes outwardly on both sides of columns.SOLUTION: A frame 10 comprises a central beam 20, a plurality of cross beams 30 joined at intervals along a longitudinal direction of the central beam 20 and projecting outwardly on both sides in a direction intersecting the central beam 20, a plurality of columns 50, which support the central beam 20 and are provided at a plurality of spans with each span being the distance between joints of the central beam 20 and the cross beams 30, and two end small beams 40 formed by arranging divided beams, which are arranged along the central beam 20 and joined to ends of the cross beams 30, in a longitudinal direction. The length of the divided beam is shorter than intervals between the columns 50.SELECTED DRAWING: Figure 1A

Description

Technical Field

[0001] The present invention relates to a structure.

Background Art

[0002] Patent Document 1 below describes a roof structure in which a horizontal member is fixed to a support column and a translucent member is disposed on the horizontal member. In this roof, a beam extending along the longitudinal direction of the roof is fixed to the tip of the horizontal member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a structure formed by a horizontal member that projects to both sides of a column as in the roof shown in Patent Document 1 above, for example, an eccentric load may act due to snow accumulation or wind uplift, resulting in torsional deformation. In order to suppress such torsional deformation, it is conceivable to increase the cross-sectional area of the members constituting the roof to increase the rigidity. However, in such a mode, the weight of the roof increases, which affects constructability, economy, design, etc.

[0005] In consideration of the above facts, an object of the present invention is to suppress deformation of a roof structure that projects to both sides of a column.

Means for Solving the Problems

[0006] The structure of Claim 1 includes a central beam, a plurality of intersecting beams joined at intervals in the longitudinal direction of the central beam and protruding to both sides in a direction intersecting the central beam, a plurality of columns provided at each span with the span being defined as the section between the joints of the central beam and the intersecting beams and supporting the central beam, and two tip crossbeams formed by arranging split beams longitudinally along the central beam and joined to the tips of the intersecting beams. The material length of the tip split beam is shorter than the interval between the columns.

[0007] In the structure of Claim 1, a roof structure that protrudes to both sides of the columns is formed by the central beam, the intersecting beams, and the tip crossbeams. And the material length of the split beam forming the tip crossbeam is shorter than the interval between the columns. Therefore, it is less likely to bend compared to the case where the tip crossbeam is formed using a split beam with a material length equal to or greater than the interval between the columns. Thereby, deformation of the roof structure can be suppressed.

[0008] The structure of Claim 2 is the structure according to Claim 1, wherein the ends of the split beams are pin - joined to the intersecting beams, and the positions of the split beams in the longitudinal direction of the central beam are offset at the tip crossbeams on both sides of the central beam.

[0009] In the structure of Claim 2, the ends of the split beams pin - joined to the intersecting beams are arranged alternately in the longitudinal direction of the central beam on both sides of the central beam. Therefore, in the longitudinal direction of the central beam, the stress is dispersed, and the eccentric load acting on the structure can be supported over a wide range. Thereby, the eccentric load can be handled without increasing the cross - sectional areas of the intersecting beams and the tip crossbeams.

[0010] The structure according to claim 3 is the structure according to claim 1 or 2, wherein the cross beam includes a first cross beam with the central portion of the split beam fixed to one end as viewed from the central beam, and a second cross beam with the central portion of the split beam fixed to the other end as viewed from the central beam. A first beam unit formed by the first cross beam and the split beam with its central portion fixed to the first cross beam, and a second beam unit formed by the second cross beam and the split beam with its central portion fixed to the second cross beam are alternately arranged along the longitudinal direction of the central beam. The ends of the split beam are pin-jointed to the other end of the first cross beam and one end of the second cross beam.

[0011] In the structure according to claim 3, a T-shaped beam unit is formed by the cross beam and the split beam. The T-shaped first beam unit and the second beam unit are alternately arranged along the longitudinal direction of the central beam.

[0012] As a result, the ends of the split beam pin-jointed to the cross beam are arranged alternately in the longitudinal direction of the central beam on both sides of the cross beam.

Advantages of the Invention

[0013] According to the present invention, deformation of the roof structure that jumps out to both sides of the column can be suppressed.

Brief Description of the Drawings

[0014]

Figure 1A

Figure 1B

Figure 2A

Figure 2B

Figure 3A

Figure 3B

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0015] Hereinafter, the structure according to an embodiment of the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of components may exist.

[0016] Also, descriptions of overlapping configurations and reference numerals in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and appropriate changes can be made, such as omitting configurations, replacing with different configurations, and using combinations of one embodiment and various modifications within the scope of the object of the present disclosure.

[0017] In each drawing, the directions indicated by arrows X and Y are directions along the horizontal plane and are perpendicular to each other. Also, the direction indicated by arrow Z is a direction along the vertical direction (up and down direction). In each drawing, the directions indicated by arrows X, Y, and Z are assumed to be the same as each other.

[0018] <Structure> As shown in FIG. 1A, the structure 10 according to an embodiment of the present invention includes a central beam 20, a cross beam 30, a tip beamlet 40, and a column 50. Although not shown, a plate material is fixed above the central beam 20, the cross beam 30, and the tip beamlet 40. Thereby, a roof structure supported by the column 50 is formed.

[0019] As shown in FIG. 1A, the central beam 20 is a beam along the longitudinal direction (X direction) of the roof and is formed of H-shaped steel.

[0020] The cross beam 30 is a cantilever beam that is joined at intervals in the longitudinal direction of the central beam 20 and projects outwards on both sides in the direction (Y direction) intersecting the central beam 20.

[0021] As shown in FIG. 3A, the cross beam 30A (an example of the cross beam 30) is shaped such that the beam depth gradually decreases from the portion joined to the column 50 towards the tip, thereby ensuring a water gradient for the plate material arranged above the cross beam 30A.

[0022] The tip small beam 40 is a beam arranged along the central beam 20 and is joined to each of the two ends of the cross beam 30. The tip small beam 40 is formed using an angle material.

[0023] The column 50 is formed of a steel pipe, and the column base is embedded in the foundation 60. As shown in FIG. 1A, one column 50 is provided for every three joints between the central beam 20 and the cross beam 30. In other words, the columns 50 are provided every three spans, with one span being the distance between joints of the central beam 20 and the cross beam 30.

[0024] The structure 10 is configured by continuously arranging the basic unit 10A shown by the dashed line in FIG. 1A in the X direction. As shown in FIG. 1B, this basic unit 10A is further formed by combining a plurality of units and members.

[0025] Specifically, the central beam 20 is formed by assembling the unit UN1, unit UN2, unit UN3, split beams 40A and 40B.

[0026] As also shown in FIG. 3A, the unit UN1 is a "column-beam unit" in which the central beam 20A and the cross beam 30A are joined to the upper end of the column 50 and formed in a cross shape in plan view as shown in FIG. 1B.

[0027] The unit UN2 is a "beam unit" in which the cross beams 30A and 30B are joined to the central beam 20B and formed in a shape where crosses are arranged in the X direction in plan view.

[0028] As shown in Fig. 3A, the unit UN3 is a "column-beam unit" formed in a cross shape in plan view as shown in Fig. 1B, with the central beam 20A and the intersecting beam 30B joined to the upper end of the column 50.

[0029] As shown in Fig. 3A, the central beam 20 is a beam formed by joining the central beams 20A and 20B with a splice plate S. The intersecting beam 30 is a general term for the intersecting beams 30A and 30B. The intersecting beam 30A is a beam with the central part of the split beam 40A joined to its tip as shown in Fig. 1B. The intersecting beam 30B is a beam with the central part of the split beam 40B joined to its tip.

[0030] The split beam 40A is a beam arranged on one side in the Y direction as viewed from the central beam 20. The split beams 40A are arranged longitudinally to form the tip small beam 40 on one side. The split beam 40B is a beam arranged on the other side in the Y direction as viewed from the central beam 20. The split beams 40B are arranged longitudinally to form the tip small beam 40 on the other side.

[0031] The material lengths of the split beams 40A and 40B are shorter than the column spacing. Specifically, as described above, the column spacing is 3 spans with the joint between the central beam 20 and the intersecting beam 30 as one span, while the material lengths of the split beams 40A and 40B are 2 spans.

[0032] In this way, the basic unit 10A is formed by combining the unit UN1 with the split beam 40A joined, the unit UN2 with the split beams 40A and 40B joined, and the unit UN3 with the split beam 40B joined.

[0033] By forming the structure 10 in this way, as shown in Fig. 2A, the first beam unit SA and the second beam unit SB in a T shape in plan view are alternately arranged along the longitudinal direction of the central beam 20.

[0034] The first beam unit SA is a unit formed by the split beam 40A and the intersecting beam 30A (an example of the first intersecting beam in the present invention) with the central part of the split beam 40A fixed to one end as viewed from the central beam 20.

[0035] The second beam unit SB is a unit formed by a split beam 40B and an intersecting beam 30B (an example of the second intersecting beam in the present invention) with the central portion of the split beam 40B fixed to the end on the other side as viewed from the central beam 20.

[0036] Here, as shown as joint J2 in FIG. 2B, the central portion of the split beam 40A is fixed to the intersecting beam 30A using a gusset plate G. Similarly, although not shown, the central portion of the split beam 40B is fixed to the intersecting beam 30B using a gusset plate G.

[0037] Also, as shown as joint J1 in FIG. 2B etc., the end portion of the split beam 40A is fixed (pin - joined) to the intersecting beam 30B using a gusset plate G. Similarly, although not shown, the end portion of the split beam 40B is fixed to the intersecting beam 30A using a gusset plate G. Note that the joint J1 is shown surrounded by a dashed line in FIGS. 1A and 5.

[0038] <Function and effect> In the structure 10 according to the embodiment of the present invention, as shown in FIG. 1A, a roof structure that jumps out to both sides of the column 50 is formed by the central beam 20, the intersecting beam 30, and the tip small beam 40. And the material lengths (2 - span) of the split beams 40A and 40B that form the tip small beam 40 are shorter than the interval (3 - span) between the columns 50.

[0039] Therefore, the tip small beam 40 is less likely to bend compared to the case where the tip small beam is formed using a split beam with a material length equal to or greater than the interval between the columns 50.

[0040] Also, in the structure 10 according to the embodiment of the present invention, as shown in FIG. 2A, a T - shaped first beam unit SA is formed by the intersecting beam 30A and the split beam 40A. Similarly, a T - shaped second beam unit SB is formed by the intersecting beam 30B and the split beam 40B.

[0041] Then, the T-shaped first beam unit SA and the second beam unit SB are alternately arranged along the longitudinal direction of the central beam 20. As a result, the ends of the split beams 40A and 40B pinned to the intersecting beam 30 are arranged alternately in the longitudinal direction of the central beam 20 on both sides of the central beam 20.

[0042] Specifically, in the structure 10, the intersecting beams 30A and 30B are alternately arranged in the longitudinal direction of the central beam 20. And, the end of the split beam 40B pinned to the intersecting beam 30A on one side of the central beam 20 and the end of the split beam 40A pinned to the intersecting beam 30B on the other side of the central beam 20 are arranged alternately in the longitudinal direction of the central beam 20.

[0043] For this reason, in the longitudinal direction of the central beam 20, the stress is dispersed to both sides, and the eccentric load acting on the structure 10 can be supported over a wide range. As a result, the eccentric load can be handled without increasing the cross-sectional area of the intersecting beam 30 or the tip small beam 40. Thereby, the deformation of the roof structure can be suppressed.

[0044] Here, FIG. 4 shows, as a comparative example, a structure 100 in which the tip small beam 400 is formed using a split beam having a material length equal to the interval between the columns 50 (that is, 3 spans). And, FIG. 5 exaggeratedly shows the amount of deformation when a downward eccentric load is applied to the front side of the paper in the structure 100 of the comparative example and the structure 10 of an embodiment of the present invention.

[0045] As shown in this figure, the structure 10 in which the split span (interval of the joint J1) of the tip small beam 40 is short and the split locations are alternately arranged on both sides of the central beam 20 in the longitudinal direction of the central beam 20 has a smaller amount of deformation compared to the structure 100 in which the split span (interval of the joint J1) of the tip small beam 40 is long and the split locations coincide on both sides of the central beam 20 in the longitudinal direction of the central beam 20.

[0046] <Other Embodiments> In the above embodiment, the interval between the columns 50 is three spans and the divided span of the tip girders 40 is two spans, but the embodiments of the present invention are not limited to this. If the divided span of the tip girders 40 is smaller than the interval between the columns 50, their lengths can be changed as appropriate.

[0047] Also, in the above embodiment, the dividing points of the tip girders 40 are alternately arranged on both sides of the central beam 20 in the longitudinal direction of the central beam 20, but the embodiments of the present invention are not limited to this. For example, there may be a location where the dividing points of the tip girders 40 coincide on both sides of the central beam 20 in the longitudinal direction of the central beam 20.

[0048] Moreover, various types of steel materials can be used for the steel materials constituting each member. For example, channel steel, H-shaped steel, or other steel materials may be used for the tip girders 40. Also, for the columns 50, square steel pipes, round steel pipes, box steel materials, H-shaped steel, or other steel materials may be used. For the central beam 20 and the cross beams 30 as well, various steel materials can be selected according to the required structural strength and design properties. Furthermore, these members can also be made of wood. Thus, the present invention can be implemented in various forms.

Explanation of Reference Numerals

[0049] 10 Structure 20 Central beam 20A Central beam 20B Central beam 30 Cross beam 30A Cross beam (first cross beam) 30B Cross beam (second cross beam) 40 Tip girder 40A Divided beam 40B Divided beam 50 Column SA First beam unit SB Second beam unit

Claims

1. A central beam, a plurality of intersecting beams joined at intervals in the longitudinal direction of the central beam and projecting outward on both sides in a direction intersecting the central beam, a plurality of columns that support the central beam and are provided for each of a plurality of spans with the joints between the central beam and the intersecting beams defined as one span, two tip crossbeams formed by arranging longitudinally side by side split beams disposed along the central beam and joined to the tips of the intersecting beams, comprising: wherein the material length of the split beam is shorter than the interval between the columns, a structure.

2. The end of the split beam is pin - joined to the intersecting beam and is offset in the longitudinal direction of the central beam at the tip crossbeams on both sides of the central beam respectively, The structure according to Claim 1.

3. The intersecting beam has a first intersecting beam with the central part of the split beam fixed to one - side end as viewed from the central beam, and a second intersecting beam with the central part of the split beam fixed to the other - side end as viewed from the central beam, and has a first beam unit formed by the first intersecting beam and the split beam with the central part fixed to the first intersecting beam, and a second beam unit formed by the second intersecting beam and the split beam with the central part fixed to the second intersecting beam, which are alternately arranged along the longitudinal direction of the central beam, wherein the end of the split beam is pin - joined to the other - side end of the first intersecting beam and the one - side end of the second intersecting beam, The structure according to Claim 1 or 2.

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