Rigid connection structure between beams and beam transportation method

Abstract

To simplify a rigid joint structure and facilitate processing.SOLUTION: A rigid connection structure between beams is provided with: a first beam 10; and two second beams 20 connected to both end parts of the first beam 10. The rigid connection structure is provided with: a steel gusset plate 30 welded on a side surface of a first web 13, an upper surface of a first lower flange 11 continued to the side surface, and a lower surface of a first upper flange 12 continued to the side surface; a steel lower plate 40 overlapped on the lower surfaces of the first lower flange 11 and two second lower flanges 21; a steel upper plate 50 overlapped on the upper surfaces of the first upper flange 12 and two second upper flanges 22; connection bolts 60 connecting the gusset plate 30 and a second web 23; main lower bolts 61 connecting the lower plate 40 and the second lower flange 21; sub lower bolts 62 connecting the lower plate 40 and the first lower flange 11; and main upper bolts 63 connecting the upper plate 50 and the second upper flange 22.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a rigid joint structure between beam members and a method for transporting beam members used in the rigid joint structure.

Background Art

[0002] Conventionally, there has been a rigid joint structure between beam members including a large beam made of H-shaped steel and two small beams made of H-shaped steel and connected to both side portions of the large beam (see, for example, Patent Document 1). In addition, as such a rigid joint structure between beam members, there is a structure shown in FIGS. 6 and 7.

[0003] As shown in FIGS. 6 and 7, the first beam member 110 is made of H-shaped steel and has a lower flange 111, an upper flange 112 located above the lower flange 111, and a web 113 connecting the lower flange 111 and the upper flange 112.

[0004] As shown in FIG. 7, two brackets 80 made of H-shaped steel are welded to the side surface of the web 113 of the first beam member 110, the upper surface and the end face of the lower flange 111 continuous with the side surface, and the lower surface and the end face of the upper flange 112 continuous with the side surface.

[0005] A second beam member 120 made of H-shaped steel is connected to each bracket 80. Each second beam member 120 has a lower flange 121, an upper flange 122 located above the lower flange 121, and a web 123 connecting the lower flange 121 and the upper flange 122.

[0006] With the splice plates 84 and 85 overlapped with the lower surface and the upper surface of the lower flange 81 of the bracket 80 and the lower surface and the upper surface of the lower flange 121 of the second beam member 120, respectively, the lower flanges 81 and 121 and the splice plates 84 and 85 are fastened by bolts 88.

[0007] The upper and lower surfaces of the upper flange 82 of the bracket 80 and the upper and lower surfaces of the upper flange 122 of the second beam member 120 are overlapped with splice plates 86 and 87, respectively, and the upper flanges 82 and 122 and the splice plates 86 and 87 are fastened by bolts 88.

[0008] Also, with the splice plate 89 overlapped with the web 83 of the bracket 80 and the web 123 of the second beam member 120, the splice plate 89 and the webs 83 and 123 are fastened by bolts 90, respectively.

Prior Art Documents

Patent Documents

[0009]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0010] In the rigid joint structure between the beam members shown in FIGS. 6 and 7, in addition to the step of welding the bracket 80 to the first beam member 110, the step of fastening the lower flange 81 of the bracket 80 and the lower flange 121 of the second beam member 120 with bolts 88 via splice plates 84 and 85, the step of fastening the upper flange 82 of the bracket 80 and the upper flange 122 of the second beam member 120 with bolts 88 via splice plates 86 and 87, and the step of fastening the web 83 of the bracket 80 and the web 123 of the second beam member 120 with bolts 90 via splice plate 89 are required. For this reason, there is a problem that the rigid joint structure becomes complicated and the processing becomes cumbersome.

Means for Solving the Problems

[0011] The rigid joint structure between beam members for solving the above problems is a rigid joint structure between beam members including a first beam member that is an H-shaped steel, and two second beam members that are H-shaped steels and are connected to both side portions of the first beam member, The first beam member has a first lower flange, a first upper flange positioned above the first lower flange, and a first web connecting the first lower flange and the first upper flange. The second beam member has a second lower flange, a second upper flange positioned above the second lower flange, and a second web connecting the second lower flange and the second upper flange. A steel gusset plate welded to the side surface of the first web, the upper surface of the first lower flange continuous with the side surface, and the lower surface of the first upper flange continuous with the side surface. A steel lower plate superimposed on the lower surfaces of the first lower flange and the two second lower flanges. A steel upper plate superimposed on the upper surfaces of the first upper flange and the two second upper flanges. A first connecting bolt connecting the first gusset plate and the second web of one of the second beam members. A second connecting bolt connecting the second gusset plate and the second web of the other second beam member. A main lower bolt connecting the lower plate and the second lower flange. A sub-lower bolt connecting the lower plate and the first lower flange. A main upper bolt connecting the upper plate and the second upper flange.

[0012] The rigid joint structure between beam members for solving the above problems is a rigid joint structure between beam members including a first beam member which is an H-shaped steel and two second beam members which are H-shaped steels and are connected to both side portions of the first beam member. The first beam member has a first lower flange, a first upper flange positioned above the first lower flange, and a first web connecting the first lower flange and the first upper flange. The second beam member has a second lower flange, a second upper flange positioned above the second lower flange, and a second web connecting the second lower flange and the second upper flange. The beam composition of the first beam member is made larger than the beam composition of the second beam member. A steel bottom plate that penetrates the holes provided in the first web and is superimposed on the lower surfaces of the two second lower flanges, A steel upper plate that is superimposed on the upper surfaces of the first upper flange and the two second upper flanges, A steel gusset plate welded to the side surface of the first web, the upper surface of the bottom plate continuous with the side surface, and the lower surface of the first upper flange continuous with the side surface, Main lower bolts that connect the bottom plate and the second lower flange, Main upper bolts that connect the upper plate and the second upper flange, Connecting bolts that connect the gusset plate and the second web of the second beam member, and are provided.

[0013] The rigid joint structure between beam members that solves the above problems is a rigid joint structure between beam members including a first beam member that is an H-shaped steel and two second beam members that are H-shaped steels and are connected to both side portions of the first beam member. The first beam member has a first lower flange, a first upper flange located above the first lower flange, and a first web that connects the first lower flange and the first upper flange. The second beam member has a second lower flange, a second upper flange located above the second lower flange, and a second web that connects the second lower flange and the second upper flange. The beam depth of the first beam member is made larger than the beam depth of the second beam member. Two steel bottom plates respectively superimposed on the lower surfaces of the two second lower flanges, A steel upper plate that is superimposed on the upper surfaces of the first upper flange and the two second upper flanges, A steel gusset plate welded to the side surface of the first web, the upper surface of the bottom plate continuous with the side surface, and the lower surface of the first upper flange continuous with the side surface, Main lower bolts that connect the bottom plate and the second lower flange, Main upper bolts that connect the upper plate and the second upper flange, A connecting bolt that connects the gusset plate and the second web of the second beam member, and The lower plate is welded to the side surface of the first web.

Advantages of the Invention

[0014] According to the present invention, the rigid joint structure can be simplified and the processing can be easily performed.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0016] <First Embodiment> Hereinafter, with reference to FIGS. 1 to 3, a first embodiment in which a rigid joint structure between beam members and a method for transporting beam members used in the rigid joint structure are embodied will be described.

[0017] As shown in FIGS. 1 and 2, the rigid joint structure between beam members includes a first beam member 10 that is an H-shaped steel, two second beam members 20 that are H-shaped steels, two gusset plates 30 that are made of steel, a lower plate 40 that is made of steel, and an upper plate 50 that is made of steel.

[0018] <First Beam Member 10> As shown in FIGS. 1 and 2, the first beam member 10 has a first lower flange 11, a first upper flange 12 positioned above the first lower flange 11, and a first web 13 connecting the first lower flange 11 and the first upper flange 12. The first beam member 10 is a main beam.

[0019] <Second beam member 20> As shown in FIGS. 1 and 2, the two second beam members 20 are respectively connected to both side portions of the first beam member 10.

[0020] The second beam member 20 has a second lower flange 21, a second upper flange 22 positioned above the second lower flange 21, and a second web 23 connecting the second lower flange 21 and the second upper flange 22.

[0021] The beam formation of the second beam member 20, that is, the dimension in the vertical direction, is the same as that of the first beam member 10. The lower surface of the second lower flange 21 is on the same plane as the lower surface of the first lower flange 11. The upper surface of the second upper flange 22 is on the same plane as the upper surface of the first upper flange 12.

[0022] The second beam member 20 is a secondary beam. <Gusset plate 30> As shown in FIG. 2, the gusset plate 30 is welded to the side surface of the first web 13, the upper surface of the first lower flange 11 continuous with the same side surface, and the lower surface of the first upper flange 12 continuous with the same side surface.

[0023] In this embodiment, the gusset plate 30 is provided on one side surface of the first web 13. The gusset plate 30 and the second web 23 of the second beam member 20 are connected by a connecting bolt 60.

[0024] <Upper plate 50> As shown in FIGS. 1 and 2, the upper plate 50 is overlapped on the upper surfaces of the first upper flange 12 and the two second upper flanges 22.

[0025] As shown in Fig. 1, the upper plate 50 of the present embodiment is rectangular in plan view. As shown in Figs. 1 and 2, the upper plate 50 and the second upper flange 22 are connected by main upper bolts 63.

[0026] A plurality of main upper bolts 63 are provided for one second upper flange 22. In the present embodiment, eight main upper bolts 63 are provided, four on each side in the width direction of the second beam member 20 (the vertical direction in Fig. 1 and the direction perpendicular to the paper surface in Fig. 2) with respect to one second upper flange 22. Note that the number of main upper bolts 63 is not limited to that shown in these figures.

[0027] The upper plate 50 and the first upper flange 12 are connected by sub-upper bolts 64. In the present embodiment, four sub-upper bolts 64 are provided, two on each side in the width direction of the first beam member 10 (the left-right direction in Figs. 1 and 2). Note that the number of sub-upper bolts 64 is not limited to that shown in these figures.

[0028] As shown in Fig. 1, the sub-upper bolts 64 are provided at positions corresponding to the four corners of a square whose one side and the other side extend along the extending direction of the first beam member 10 (the vertical direction in Fig. 1) and the extending direction of the second beam member 20 (the left-right direction in Fig. 1), respectively.

[0029] <Lower plate 40> As shown in Fig. 2, the lower plate 40 is overlapped on the lower surfaces of the first lower flange 11 and the two second lower flanges 21. The lower plate 40 has the same shape and size as the upper plate 50.

[0030] The lower plate 40 and the second lower flange 21 are connected by main lower bolts 61. A plurality of main lower bolts 61 are provided for one second lower flange 21. In the present embodiment, four main lower bolts 61 are provided on each of both sides in the width direction of the second beam member 20 (the vertical direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. 2), for a total of eight. Note that the number of main lower bolts 61 is not limited to that shown in these figures.

[0031] The lower plate 40 and the first lower flange 11 are connected by sub-lower bolts 62. In the present embodiment, two sub-lower bolts 62 are provided on each of both sides in the width direction of the first beam member 10 (the left-right direction in FIGS. 1 and 2), for a total of four. Note that the number of sub-lower bolts 62 is not limited to that shown in these figures.

[0032] Although illustration is omitted, the sub-lower bolts 62 are provided at positions corresponding to the four corners of a square whose one side and the other side extend along the extending direction of the first beam member 10 (the vertical direction in FIG. 1) and the extending direction of the second beam member 20 (the left-right direction in FIG. 1), respectively.

[0033] The main upper bolts 63 and the main lower bolts 61 are preferably extra-high strength bolts with a strength level of F14T. Next, a method for transporting the first beam member 10 will be described.

[0034] As shown in FIG. 3, when transporting the first beam member 10 from the factory to the construction site, the longitudinal direction of the upper plate 50 is aligned with the longitudinal direction of the first beam member 10, and the upper plate 50 is overlapped on the upper surface of the first upper flange 12 and temporarily fixed to the first upper flange 12 by sub-upper bolts 64. Also, the longitudinal direction of the lower plate 40 is aligned with the longitudinal direction of the first beam member 10, and the lower plate 40 is overlapped on the lower surface of the first lower flange 11 and temporarily fixed to the first lower flange 11 by sub-lower bolts 62.

[0035] Next, the operation and effect of the present embodiment will be described. (1) The first beam member 10 and the two second beam members 20 are connected via gusset plates 30 respectively welded to the side portions of the first beam member 10. In addition, the first lower flange 11 of the first beam member 10 and the second lower flanges 21 of the two second beam members 20 are connected via a lower plate 40, and the first upper flange 12 of the first beam member 10 and the second upper flanges 22 of the two second beam members 20 are connected via an upper plate 50. Therefore, the rigid joint structure can be simplified and the processing can be easily performed.

[0036] (2) When transporting the first beam member 10, it is possible to align the longitudinal direction of the upper plate 50 with the longitudinal direction of the first beam member 10, overlap the upper plate 50 on the upper surface of the first upper flange 12, and temporarily fix it to the first upper flange 12 with sub-upper bolts 64. As a result, the upper plate 50 does not protrude to the side of the first beam member 10. Therefore, the first beam member 10 and the upper plate 50 can be transported in a compact manner.

[0037] (3) When the main lower bolts 61 and the main upper bolts 63 are ultra-high strength bolts, they have an allowable shear force about 1.5 times that of high strength bolts with a strength level of S10T. For this reason, the number of the main lower bolts 61 and the main upper bolts 63 can be reduced to about 1 / 1.5, and the length of the lower plate 40 and the upper plate 50 in the longitudinal direction (the left-right direction in FIGS. 1 and 2) can be reduced to about 1 / 1.5. Thereby, the weight of the rigid joint structure can be reduced.

[0038] <Second Embodiment> Hereinafter, with reference to FIG. 4, the second embodiment will be described. In the second embodiment, the difference from the first embodiment is that the beam composition of the first beam member 10 is larger than that of the second beam member 20. Hereinafter, the description will be centered on the differences from the first embodiment. In this embodiment, for the same or corresponding configurations as those in the first embodiment, the same reference numerals as those in the first embodiment may be used to omit duplicate descriptions.

[0039] As shown in FIG. 4, the beam formation of the first beam member 10, that is, the dimension in the vertical direction, is larger than the beam formation of the second beam member 20. The upper surface of the second upper flange 22 is flush with the upper surface of the first upper flange 12. The lower surface of the first lower flange 11 is positioned below the lower surface of the second lower flange 21.

[0040] The lower plate 40 passes through the hole 14 provided in the first web 13 and is overlapped with the lower surfaces of the two second lower flanges 21. A welded portion W is provided at the peripheral edge of the hole 14 in the first web 13, where the peripheral edge and the lower plate 40 are fillet welded.

[0041] The gusset plate 30 is welded to the side surface of the first web 13, the upper surface of the lower plate 40 continuous with the same side surface, and the lower surface of the first upper flange 12 continuous with the same side surface. The lower plate 40 and the first lower flange 11 are connected by a connecting member 70. The connecting member 70 of the present embodiment is a stiffener and is welded to the lower surface of the lower plate 40, the upper surface of the first lower flange 11, and the side surface of the first web 13.

[0042] Next, the operation and effect of the present embodiment will be described. (4) The first lower flange 11 of the first beam member 10 and the second lower flanges 21 of the two second beam members 20 are connected via the lower plate 40, and the first upper flange 12 of the first beam member 10 and the second upper flanges 22 of the two second beam members 20 are connected via the upper plate 50.

[0043] By the way, when two lower plates 40 are provided on both sides of the first web 13, the first web 13 and each of the lower plates 40 are to be butt-welded. In this regard, according to the present embodiment, since the lower plate 40 passes through the hole 14 provided in the first web 13, the first web 13 and the lower plate 40 can be fillet welded. Therefore, compared with butt welding, it is possible to reduce the processing cost by reducing the amount of welding.

[0044] Therefore, the rigid joint structure can be simplified and the processing can be easily performed. (5) Since the connecting member 70 for connecting the lower plate 40 and the first lower flange 11 is provided, the joining strength between the first beam member 10 and the two second beam members 20 can be further enhanced.

[0045] <Third Embodiment> Hereinafter, with reference to FIG. 5, the third embodiment will be described. In the third embodiment, it is different from the second embodiment in that the lower plate 40 does not penetrate the first web 13 of the first beam member 10. Hereinafter, the description will focus on the differences from the second embodiment. In this embodiment, for the configurations that are the same as or corresponding to those in the second embodiment, the same reference numerals as those in the second embodiment may be used to omit redundant descriptions.

[0046] As shown in FIG. 5, the two lower plates 40 are respectively overlapped on the lower surfaces of the two second lower flanges 21. The first web 13 of this embodiment is not provided with a hole 14. The lower plate 40 is welded to the side surface of the first web 13. Specifically, a welded portion W where the edge portion of the lower plate 40 and the side surface of the first web 13 are welded is provided at the edge portion of the lower plate 40.

[0047] In this embodiment, in addition to the effects (5) of the second embodiment, the following effects are newly achieved. (6) The two lower plates 40 are respectively overlapped on the lower surfaces of the two second lower flanges 21. The lower plate 40 is welded to the side surface of the first web 13. Therefore, the two lower plates 40 can be connected to the first web 13 without forming a hole 14 in the first web 13.

[0048] <Modification Example> This embodiment is not limited to the first to third embodiments described above, and can be implemented, for example, by making the following changes. This embodiment and the following modification examples can be implemented in combination with each other within a technically non - conflicting range.

[0049] · In the first embodiment, when transporting the first beam member 10, it is also possible not to temporarily fix one of the lower plate 40 and the upper plate 50 to the first beam member 10. Also, when transporting the first beam member 10, it is also possible not to temporarily fix both the lower plate 40 and the upper plate 50 to the first beam member 10.

[0050] · In the first and second embodiments, the main lower bolt 61 and the main upper bolt 63 can also be high-strength bolts with a strength level of, for example, S10T. · In the first and second embodiments, the shapes of the lower plate 40 and the upper plate 50 are not limited to rectangular shapes, and can be appropriately changed to trapezoidal shapes or the like.

[0051] · In the second and third embodiments, the connecting member 70 can also be omitted.

Explanation of Reference Numerals

[0052] 10, 110... first beam member, 11... first lower flange, 12... first upper flange, 13... first web, 14... hole, 20... second beam member, 21... second lower flange, 22... second upper flange, 23... second web, 30... gusset plate, 40... lower plate, 50... upper plate, 60... connecting bolt, 61... main lower bolt, 62... sub-lower bolt, 63... main upper bolt, 64... sub-upper bolt, 70... connecting member, 80... bracket, 81... lower flange, 82... upper flange, 83... web, 84, 85, 86, 87... splice plate, 88, 90... bolt, 89... splice plate, W... welded part

Claims

1. A rigid joint structure between beam members comprising a first beam member which is an H-shaped steel, and two second beam members which are H-shaped steels and are connected to both side portions of the first beam member, wherein the first beam member has a first lower flange, a first upper flange located above the first lower flange, and a first web connecting the first lower flange and the first upper flange, the second beam member has a second lower flange, a second upper flange located above the second lower flange, and a second web connecting the second lower flange and the second upper flange, a steel gusset plate welded to a side surface of the first web, an upper surface of the first lower flange continuous with the side surface, and a lower surface of the first upper flange continuous with the side surface, a steel lower plate overlapped with lower surfaces of the first lower flange and the two second lower flanges, a steel upper plate overlapped with upper surfaces of the first upper flange and the two second upper flanges, connecting bolts connecting the gusset plate and the second web of the second beam member, main lower bolts connecting the lower plate and the second lower flange, sub-lower bolts connecting the lower plate and the first lower flange, and main upper bolts connecting the upper plate and the second upper flange, a rigid joint structure between beam members.

2. A rigid joint structure between beam members comprising a first beam member which is an H-shaped steel, and two second beam members which are H-shaped steels and are connected to both side portions of the first beam member, wherein the first beam member has a first lower flange, a first upper flange located above the first lower flange, and a first web connecting the first lower flange and the first upper flange, the second beam member has a second lower flange, a second upper flange located above the second lower flange, and a second web connecting the second lower flange and the second upper flange, the beam composition of the first beam member is made larger than the beam composition of the second beam member, a steel lower plate which penetrates through holes provided in the first web and is overlapped with lower surfaces of the two second lower flanges, a steel upper plate overlapped with upper surfaces of the first upper flange and the two second upper flanges, a steel gusset plate welded to a side surface of the first web, an upper surface of the lower plate continuous with the side surface, and a lower surface of the first upper flange continuous with the side surface, main lower bolts connecting the lower plate and the second lower flange, A main upper bolt for connecting the upper plate and the second upper flange; A connecting bolt for connecting the gusset plate and the second web of the second beam member; A rigid joint structure between beam members.

3. A rigid joint structure between beam members, comprising a first beam member which is an H-shaped steel, and two second beam members which are H-shaped steels and are connected to both side portions of the first beam member, The first beam member has a first lower flange, a first upper flange located above the first lower flange, and a first web connecting the first lower flange and the first upper flange, The second beam member has a second lower flange, a second upper flange located above the second lower flange, and a second web connecting the second lower flange and the second upper flange, The beam depth of the first beam member is made larger than the beam depth of the second beam member, Two lower plates made of steel, each of which is superposed on the lower surface of the two second lower flanges; An upper plate made of steel, which is superposed on the upper surfaces of the first upper flange and the two second upper flanges; A gusset plate made of steel, which is welded to the side surface of the first web, the upper surface of the lower plate continuous with the side surface, and the lower surface of the first upper flange continuous with the side surface; A main lower bolt for connecting the lower plate and the second lower flange; A main upper bolt for connecting the upper plate and the second upper flange; A connecting bolt for connecting the gusset plate and the second web of the second beam member; The lower plate is welded to the side surface of the first web. A rigid joint structure between beam members.

4. Comprising a connecting member for connecting the lower plate and the first lower flange; The rigid joint structure between beam members according to claim 2 or claim 3.

5. The upper plate is rectangular; Comprising a sub-upper bolt for connecting the upper plate and the first upper flange; The rigid joint structure between beam members according to claim 1.

6. A method for transporting the first beam member used in the rigid joint structure between beam members according to claim 5, The first beam member is transported in a state where the longitudinal direction of the upper plate is made to coincide with the longitudinal direction of the first beam member, the upper plate is superposed on the upper surface of the first upper flange, and temporarily fixed to the first upper flange by the sub-upper bolt. A method for transporting a beam member used in a rigid joint structure between beam members.

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