Connection structure

Abstract

To provide connection structure that can improve the degree of freedom in design of a frame using vertical and horizontal members.SOLUTION: Connection structure 10 connects vertically extending wooden vertical members 11, 12 to a horizontally extending steel-framed horizontal member 13. The connection structure 10 includes a box-shaped steel portion made of steel, a first filler 63 filled inside the steel portion, a connecting rod 61 that extends vertically and is fixed to the steel portion by the first filler 63 and inserted into a rod connecting hole formed in the vertical members 11, 12, and second fillers 75, 65 filled into the rod connecting hole and connecting the vertical members 11, 12 to the connecting rod 61. The steel portion includes a first steel portion 20 to which the horizontal member 13 is connected, and second steel portions 40, 50 located between the vertical members 11, 12 and the first steel portion 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a connection structure for connecting wooden vertical members to steel-framed horizontal members. [Background technology]

[0002] The invention described in Patent Document 1 is known as a connection structure for connecting wooden vertical members and steel horizontal members. In Patent Document 1, a precast structure is used for the connection portion connecting the vertical members and horizontal members. This precast structure has a connecting portion formed of a cement composition to which the vertical members are joined, and a steel structure formed of H-shaped steel to which the horizontal members are joined. The steel structure has an embedded portion embedded in the connecting portion and a protruding portion that protrudes from the side of the connecting portion to which the horizontal members are joined. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-14542 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the structure described in Patent Document 1 leaves room for improvement in terms of the degree of freedom in designing a frame using vertical and horizontal members, for example, due to poor fit when braces are connected to each other. [Means for solving the problem]

[0005] The connection structure for solving the above problems connects a wooden vertical member extending in the vertical direction and a steel frame horizontal member extending in the horizontal direction. The connection structure includes a box-shaped steel part made of steel, a first filling material filled inside the steel part, a joining rod that extends in the vertical direction, is fixed to the steel part by the first filling material, and is inserted into a rod joining hole formed in the vertical member, and a second filling material that is filled in the rod joining hole to join the vertical member and the joining rod. The steel part has a first steel part to which the horizontal member is joined and a second steel part located between the vertical member and the first steel part.

Advantages of the Invention

[0006] According to the present invention, the degree of freedom in designing a structure using vertical and horizontal members can be improved.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0008] Referring to FIGS. 1 to 9, an embodiment of the connection structure will be described. As shown in FIG. 1, the connection structure 10 forms a framework in which the upper vertical member 11 and the lower vertical member 12 are connected to the steel cross member 13 of the steel frame structure via the connection portion 18. The upper vertical member 11 is a wooden member extending in the vertical direction above the connection portion 18. The lower vertical member 12 is a wooden member extending in the vertical direction below the connection portion 18. The cross member 13 is a steel frame member extending laterally from the connection portion 18. The cross member 13 is composed of an H-shaped steel having an upper flange 14, a lower flange 15, and a web 16.

[0009] The connection portion 18 has a steel portion formed in a box shape by joining various steel materials. The steel portion has a first steel portion 20 to which the cross member 13 is joined, an upper second steel portion 40 located between the upper vertical member 11 and the first steel portion 20, and a lower second steel portion 50 located between the lower vertical member 12 and the first steel portion 20.

[0010] (Steel portion) Referring to FIGS. 2 to 4, the steel portion will be described. In FIG. 2, in order to avoid complexity, the hatching of the vertical members 11, 12, etc. is appropriately omitted.

[0011] As shown in FIG. 2, the first steel portion 20 has a first cylindrical portion 21, an upper first diaphragm 22, and a lower first diaphragm 23. The first cylindrical portion 21 has a square cylindrical shape. The first cylindrical portion 21 may be composed of an angle steel pipe or may be composed of joining a plurality of steel plates by welding or the like. The web 16 of the cross member 13 is joined to the side surface portion of the first cylindrical portion 21.

[0012] The upper first diaphragm 22 is joined to the upper end portion of the first cylindrical portion 21. The upper first diaphragm 22 is a through diaphragm having an upper flange portion 22a protruding from the first cylindrical portion 21 on its outer peripheral portion. The upper flange 14 of the cross member 13 is joined to the upper flange portion 22a.

[0013] The lower first diaphragm 23 is joined to the lower end of the first cylindrical portion 21. The lower first diaphragm 23 is a through diaphragm having a lower flange portion 23a protruding from the first cylindrical portion 21 at its outer periphery. The lower flange 15 of the cross member 13 is joined to the lower flange portion 23a.

[0014] In this embodiment, the upper first diaphragm 22 and the lower first diaphragm 23 are formed in the same shape. Therefore, when the upper first diaphragm 22 and the lower first diaphragm 23 are not distinguished, they are simply referred to as the first diaphragm.

[0015] The upper second steel portion 40 has an upper second cylindrical portion 41 and an upper second diaphragm 42. The upper second steel portion 40 is formed to have a length L1. The upper second cylindrical portion 41 has a square cylindrical shape. The upper second cylindrical portion 41 may be composed of a square steel pipe, or may be composed of a plurality of steel plates joined by welding or the like. The lower end portion (one end portion) of the upper second cylindrical portion 41 is joined to the upper first diaphragm 22 of the first steel portion 20. The upper second diaphragm 42 is an inner diaphragm joined to the inner surface of the upper second cylindrical portion 41 at the upper end portion (the other end portion) of the upper second cylindrical portion 41. The length L1 of the upper second cylindrical portion 41 is preferably larger than the thickness H of the floor slab of the upper floor supported by the upper flange 14 of the cross member 13. Note that the upper second diaphragm 42 does not have to be an inner diaphragm.

[0016] The lower second steel portion 50 has a lower second cylindrical portion 51 and a lower second diaphragm 52. The lower second steel portion 50 is formed to have a length L2. The lower second cylindrical portion 51 has a square cylindrical shape. The lower second cylindrical portion 51 may be composed of a square steel pipe, or may be composed of a plurality of steel plates joined by welding or the like. The upper end portion (one end portion) of the lower second cylindrical portion 51 is joined to the lower first diaphragm 23. The lower second diaphragm 52 is an inner diaphragm joined to the inner surface of the lower second cylindrical portion 51 at the lower end portion (the other end portion) of the lower second cylindrical portion 51. Note that the lower second diaphragm 52 does not have to be an inner diaphragm.

[0017] In addition, the connecting portion 18 has a joining rod 61, a reinforcing bar 62, and a first filler 63. The joining rod 61 is provided so as to penetrate each end portion of the steel portion in the left - right direction in FIG. 2 in the vertical direction. The joining rod 61 is constituted by, for example, deformed reinforcing bars. The joining rod 61 mainly functions as a member that resists the bending moment acting on the connecting portion 18.

[0018] The joining rod 61 has a fixing portion, an upper joining portion, and a lower joining portion. The fixing portion is a portion disposed inside the steel portion. The fixing portion is fixed to the steel portion by the first filler 63 formed inside the steel portion. The upper joining portion is a portion protruding from the steel portion toward the upper vertical member 11. The upper joining portion is a portion joined to the upper vertical member 11. The lower joining portion is a portion protruding downward from the steel portion. The lower joining portion is a portion joined to the lower vertical member 12.

[0019] The reinforcing bar 62 is provided so as to penetrate the steel portion in the vertical direction. The reinforcing bar 62 is constituted by, for example, deformed reinforcing bars. The upper end of the reinforcing bar 62 is located below the upper end of the joining rod 61, and the lower end of the reinforcing bar 62 is located above the lower end of the joining rod 61. The reinforcing bar 62 is a so - called dowel bar and mainly resists the shearing force acting on the connecting portion 18.

[0020] The reinforcing bar 62 is provided so as to penetrate the central region of the steel portion in FIG. 2 in the vertical direction. Similar to the joining rod 61, the reinforcing bar 62 has a fixing portion, an upper joining portion, and a lower joining portion. The fixing portion is a portion disposed inside the steel portion. The fixing portion is fixed to the steel portion by the first filler 63 formed inside the steel portion. The upper joining portion is a portion protruding from the steel portion toward the upper vertical member 11. The upper joining portion is a portion joined to the upper vertical member 11. The lower joining portion is a portion protruding downward from the steel portion. The lower joining portion is a portion joined to the lower vertical member 12.

[0021] The first filling material 63 is formed of a first cement composition. The first cement composition may be concrete, or may be a cement-based material (fiber-reinforced concrete material) mixed with fibers such as Slimcrete (registered trademark). The first filling material 63 is formed by curing a first cement composition placed using a steel part as a formwork with the joining rod 61 and the reinforcing bar 62 disposed so as to penetrate the steel part.

[0022] (Upper second diaphragm) As shown in FIG. 3, the upper second diaphragm 42 is formed with a placing hole 43, a rod through-hole 44, and a communication hole 45.

[0023] The placing hole 43 is an opening formed in the central region of the upper second diaphragm 42. The placing hole 43 is used as an inlet when placing the first cement composition into the internal space of the steel part. Further, the placing hole 43 functions as a through-hole through which the reinforcing bar 62 penetrates.

[0024] The rod through-hole 44 is formed so as to surround the placing hole 43. The rod through-hole 44 is a hole through which the joining rod 61 penetrates. The communication hole 45 is formed at each corner of the upper second diaphragm 42. The communication hole 45 functions as an air vent hole when placing the first cement composition into the internal space of the steel part.

[0025] (First diaphragm) The first diaphragm will be described with reference to FIG. 4. Since the upper first diaphragm 22 and the lower first diaphragm 23 have the same shape, the first diaphragm will be described here using the upper first diaphragm 22.

[0026] As shown in FIG. 4, the upper first diaphragm 22 is formed with a placing hole 26, a rod through-hole 27, and a communication hole 28. The placing hole 26 is an opening formed in the central region of the upper first diaphragm 22. The placing hole 26 functions as a flow hole when the first cement composition flows between the first cylindrical portion 21 and the upper second cylindrical portion 41 (see FIG. 2). Further, the placing hole 26 functions as a through hole through which the reinforcing bar 62 penetrates.

[0027] The rod through hole 27 is formed so as to surround the placing hole 26. The rod through hole 27 is a hole through which the joining rod 61 penetrates. The communication hole 28 is formed at a position corresponding to each corner portion of the first cylindrical portion 21 located below the upper first diaphragm 22. The communication hole 28 functions as an air vent hole when the first cement composition is placed.

[0028] (Lower second diaphragm) As shown in FIG. 5, the lower second diaphragm 52 is formed with a rod through hole 54 and a reinforcing bar through hole 55.

[0029] The rod through hole 54 is a hole through which the rod through hole 54 penetrates. The rod through hole 54 is formed at a position corresponding to each joining rod 61. The reinforcing bar through hole 55 functions as a through hole through which the reinforcing bar 62 penetrates. The reinforcing bar through hole 55 is formed at a position corresponding to each reinforcing bar 62.

[0030] (Regarding the joining method of the vertical member and the connection part) The vertical members 11, 12 and the connection part 18 are joined by the GIR (Glued in Rod) method. Note that the vertical members 11, 12 and the connection part 18 are joined by basically the same joining method. Therefore, after explaining in detail the joining method of the lower vertical member 12 and the connection part 18 with reference to FIGS. 6 and 7, the joining method of the upper vertical member 11 and the connection part 18 will be briefly explained with reference to FIG. 8.

[0031] As shown in FIG. 6, the connecting portion 18 is joined to the lower vertical member 12 installed at a predetermined position by a lower second filler 65 (see FIG. 2) via a joining rod 61 and a reinforcing bar 62. The lower second filler 65 is formed by curing a second cement composition such as mortar. In FIG. 6, the hatching of the lower vertical member 12 is omitted.

[0032] The lower vertical member 12 is formed with rod joining holes 66, reinforcing bar joining holes 67, and access holes 68 and 69. The rod joining hole 66 is a hole into which the joining rod 61 is inserted. The reinforcing bar joining hole 67 is a hole into which the reinforcing bar 62 is inserted. The access holes 68 and 69 are formed at the innermost portions of the respective joining holes 66 and 67. The access holes 68 and 69 are holes that communicate the respective joining holes 66 and 67 with the external space.

[0033] The second cement composition is filled in a state where the joining rod 61 is inserted into the rod joining hole 66, the reinforcing bar 62 is inserted into the reinforcing bar joining hole 67, and a predetermined gap is formed between the lower vertical member 12 and the lower second steel portion 50. The second cement composition is filled from the gap between the lower vertical member 12 and the lower second steel portion 50 as indicated by the arrow in the figure. The second cement composition is filled until it leaks out from each of the access holes 68 and 69.

[0034] Note that the second cement composition may be filled from the access holes 68 and 69. Also, in FIG. 6, the first steel portion 20 and the cross member 13 are joined, but the joining of the lower vertical member 12 may be performed before the joining of the first steel portion 20 and the cross member 13.

[0035] Further, the connecting portion 18 is joined to the lower vertical member 12 by the GIR method using a press-fitting member 70 disposed along the extending direction of the rod joining hole 66 on the side of each rod joining hole 66.

[0036] As shown in FIG. 7, the lower vertical member 12 is formed with a press-fitting hole 71 that opens on the side surface of the lower vertical member 12 and communicates with the rod joining hole 66. The press-fitting member 70 is composed of a steel material such as a round bar. The press-fitting member 70 is press-fitted into the press-fitting hole 71 before the joining rod 61 is inserted into the rod joining hole 66. The press-fitting member 70 is integrated with the joining rod 61 by the second filler 65 filled in the rod joining hole 66. Thereby, they are firmly joined.

[0037] As shown in FIG. 8, the connecting portion 18 is joined to the lower vertical member 12 by the upper second filler 75 (see FIG. 2) in which the second cement composition has hardened, via the joining rod 61 and the reinforcing bar 62. In FIG. 8, the hatching of the upper vertical member 11 is omitted.

[0038] The upper vertical member 11 is formed with a rod joining hole 76, a reinforcing bar joining hole 77, and access holes 78 and 79. The second cement composition is filled in a state where the joining rod 61 is inserted into the rod joining hole 76, the reinforcing bar 62 is inserted into the reinforcing bar joining hole 77, and a predetermined gap is formed between the upper vertical member 11 and the upper second steel portion 40. The second cement composition is filled from the access holes 78 and 79. The second cement composition is filled until it leaks out from the gap between the upper vertical member 11 and the lower second steel portion 50. Further, the connecting portion 18 is joined to the upper vertical member 11 by the GIR method using the press-fitting member 80 press-fitted into the press-fitting hole of the upper vertical member 11.

[0039] Note that the second cement composition may be filled from the gap between the upper vertical member 11 and the lower second steel portion 50. Also, the joining of the upper vertical member 11 to the connecting portion 18 may be performed before the joining of the first steel portion 20 and the cross member 13.

[0040] (Construction Method) An example of the construction method for connecting the cross member 13 and the vertical members 11 and 12 using the above-described connecting portion 18 will be described.

[0041] In this embodiment, the vertical members 11 and 12 are carried into the construction site in a state where the press-fitted members 70 and 80 are pre-press-fitted in a factory or the like. Further, the connection part 18 is carried into the construction site in a state created in a factory or the like, specifically, in a state where the joining rods 61 and the reinforcing bars 62 are fixed to the steel part by the first filler 63. Then, at the construction site, after the lower vertical member 12 is installed at a predetermined position, the connection part 18 is joined to the lower vertical member 12. Thereafter, the upper vertical member 11 is joined to the connection part 18. The joining of the horizontal member 13 and the connection part 18 is performed at an appropriate timing according to the construction situation at that time.

[0042] (Actions and effects of the embodiment) (1) The connection part 18 has a box-shaped steel part composed of a first steel part 20 and second steel parts 40 and 50 located between the first steel part 20 and the vertical members 11 and 12. Thereby, a steel material can be installed by welding at the connection part between the vertical members 11 and 12 and the horizontal member 13.

[0043] Therefore, as shown in FIG. 9, for example, by using the upper second cylindrical part 41, a brace joining member 82 (for example, a gusset plate or the like) capable of joining the brace material 81 of the steel frame structure can be easily installed. Moreover, by adjusting the length L1 of the upper second cylindrical part 41, the bearing strength at the joining part between the connection part 18 and the brace joining member 82 can be made the desired bearing strength.

[0044] Further, according to the lengths L1 and L2 of the second cylindrical parts 41 and 51, in addition to the fixing length of the joining rod 61 to the steel part, the stress gradient in the vertical members 11 and 12 can be adjusted. Furthermore, the volume of the first filler 63 can be adjusted by the lengths L1 and L2 of the second cylindrical parts 41 and 51. Thereby, according to the required fire resistance, the heat capacity of the first filler 63, that is, the heat capacity of the connection part 18 can be made the desired heat capacity.

[0045] In this way, by connecting the wooden vertical members 11 and 12 and the steel horizontal member 13 through the connection part 18 described above, the degree of freedom in the design of the structure using the vertical members 11 and 12 and the horizontal member 13 can be improved.

[0046] (2) The length L1 of the upper second cylindrical part 41 is greater than the thickness H of the floor slab supported by the upper flange 14 of the horizontal member 13. As a result, since the upper end of the upper second cylindrical part 41 is arranged at a position higher than the floor slab, the upper second steel part 40 can be used as a formwork when placing the concrete forming the floor slab. As a result, the constructability of the floor slab can be improved.

[0047] (3) Since the first diaphragms 22 and 23 are through diaphragms, the force transmission between the vertical members 11 and 12 and the horizontal member 13 can be performed efficiently. (4) The second steel parts 40 and 50 include a second cylindrical part 41 and 51 whose one end is joined to the first steel part 20, and a second diaphragm 42 and 52 joined to the other end of the second cylindrical part 41 and 51. Thereby, the load-bearing capacity of the second steel parts 40 and 50, and thus the load-bearing capacity of the connection part 18, can be increased.

[0048] (5) Since the second diaphragms 42 and 52 are inner diaphragms, when a brace joining member is installed, the load-bearing capacity of the second steel parts 40 and 50, and thus the load-bearing capacity of the connection part 18, against the force acting from the brace joining member can be effectively increased.

[0049] (6) The connection structure 10 includes a reinforcing bar that extends in the vertical direction in the central region of the steel part in a top view, is fixed to the steel part by the first filler 63, and is joined to the vertical members 11 and 12. Further, the joining rod 61 is arranged so as to surround the central region of the steel part in a top view. Thereby, the vertical members 11 and 12 and the connection part 18 can be firmly joined, and the force transmission between the vertical members 11 and 12 and the horizontal member 13 can be performed smoothly.

[0050] (7) The reinforcing bars 62 are arranged so as to penetrate the placement holes 43 of the upper second diaphragm 42 and the placement holes 26 of the first diaphragms 22 and 23. Thereby, the reinforcing bars 62 can be arranged without increasing the processing on the upper second diaphragm 42 and the first diaphragms 22 and 23.

[0051] (8) The upper second diaphragm 42 is formed with placement holes 43 and communication holes 45. Further, the first diaphragms 22 and 23 are formed with placement holes 26 and communication holes 28. Thereby, the placement of the first cement composition into each of the steel parts 20, 40, and 50 can be easily performed.

[0052] (9) The connection structure 10 further includes press-fitting members 80 and 70 that are press-fitted into press-fitting holes opening on the side surfaces of the vertical members 11 and 12, are arranged on the side of the joining rod 61, and are integrated with the joining rod 61 by the second filling materials 75 and 65. Thereby, the vertical members 11 and 12 and the joining rod 61 can be joined more firmly.

[0053] This embodiment can be implemented with the following modifications. This embodiment and the following modification examples can be implemented in combination with each other within a technically non-contradictory range. · In the connection structure 10, the vertical members 11 and 12 and the joining rod 61 may be joined without using the press-fitting members 80 and 70. Further, the vertical members 11 and 12 and the connection portion 18 may be joined only by the joining rod 61 without using the reinforcing bars 62.

[0054] · In the connection structure 10, the upper vertical member 11, the lower vertical member 12, and the horizontal member 13 are connected by the connection portion 18. Not limited to this, the connection structure 10 may have a configuration in which, for example, the lower vertical member 12 and the horizontal member 13 are connected. In this case, the connection portion 18 is composed of the first steel part 20 and the lower second steel part 50.

[0055] The technical idea grasped from the above embodiment and modification examples will be described. (Supplementary Note 1) In the above connection structure, the horizontal member is composed of an H-shaped steel having an upper flange, a lower flange, and a web. The first steel part includes an upper first diaphragm which is a continuous diaphragm having a first cylindrical part to which the web is joined and a flange part joined to the upper end of the first cylindrical part to which the upper flange is joined, and a lower first diaphragm which is a continuous diaphragm having a flange part joined to the lower end of the first cylindrical part to which the lower flange is joined.

[0056] (Appendix 2) The above connection structure further includes a reinforcing bar that extends in the vertical direction in the central region of the steel part in a top view, is fixed to the steel part by the first filler, and is joined to the vertical member. The joining rod is arranged so as to surround the central region of the steel part in a top view.

[0057] (Appendix 3) In the above connection structure, the second steel part includes a second cylindrical part having one end joined to the first steel part and a second diaphragm joined to the other end of the second cylindrical part.

[0058] (Appendix 4) The above connection structure further includes a press-fitting member that is press-fitted into a press-fitting hole that opens on the side surface of the vertical member, is arranged on the side of the joining rod, and is integrated with the joining rod by the second filler.

Explanation of Reference Signs

[0059] 10... Connection structure, 11... Upper vertical member, 12... Lower vertical member, 13... Horizontal member, 14... Upper flange, 15... Lower flange, 16... Web, 18... Connection part, 20... First steel part, 21... First cylindrical part, 22... Upper first diaphragm, 22a... Upper flange part, 23... Lower first diaphragm, 23a... Lower flange part, 26... Placing hole, 27... Rod through hole, 28... Communication hole, 40... Upper second steel part, 41... Upper second cylindrical part, 42... Upper second diaphragm, 43... Placing hole, 44... Rod through hole, 45... Communication hole, 50... Lower second steel part, 51... Lower second cylindrical part, 52... Lower second diaphragm, 54... Rod through hole, 55... Reinforcing bar through hole, 61... Joining rod, 62... Reinforcing bar, 63... First filling material, 65... Lower second filling material, 66... Rod joining hole, 67... Reinforcing bar joining hole, 68, 69... Access hole, 70... Press-fitting material, 71... Press-fitting hole, 75... Upper second filling material, 76... Rod joining hole, 77... Reinforcing bar joining hole, 78, 79... Access hole, 80... Press-fitting material, 81... Brace material, 82... Brace joining material.

Claims

1. A connection structure for connecting a wooden vertical member extending in the vertical direction and a steel horizontal member extending in the horizontal direction, a box-shaped steel part made of steel, a first filler filled inside the steel part, a joining rod that extends in the vertical direction, is fixed to the steel part by the first filler, and is inserted into a rod joining hole formed in the vertical member, and a second filler filled in the rod joining hole to join the vertical member and the joining rod. The connection structure is provided with: The steel part includes: a first steel part to which the horizontal member is joined, a second steel part located between the vertical member and the first steel part. Connection structure.

2. The connection structure has: as the vertical member, an upper vertical member located above the steel part and a lower vertical member located below the steel part, and as the second steel part, an upper second steel part located between the upper vertical member and the first steel part and a lower second steel part located between the lower vertical member and the first steel part. The connection structure according to Claim 1.

3. The connection structure according to Claim 1 or 2, further comprising a brace joining member joined to the second steel part and the horizontal member and capable of joining a brace. The connection structure according to Claim 1 or 2.

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