JP2019190206A - Beam joint structure - Google Patents

Abstract

To join beam members without subjecting the beam members to complicated processing.SOLUTION: A beam joint structure 10 that joins large beams 12 and wooden small beams 14 arranged so as to cross the large beams 12 includes a connection plate 16 including a fixing plate part 40 which is fixed to the small beams 14 and projects from the upper surface of the small beams 14, and a support plate part 42 which projects from the fixing plate part 40 and is mounted and fixed to the upper surface of the large beams 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a beam joint structure for joining beam members together.

  In a beam joint structure in which beam members are joined together, it is desirable to join the beam members without subjecting the beam members to complicated processing.

  For example, a composite wood having a load supporting layer made of wood, a burning stop layer provided outside the load supporting layer, and a burning allowance layer provided outside the burning stop layer disclosed in Patent Document 1 When the structural material is the first beam member having fire resistance, and the second beam member having fire resistance is joined to the first beam member by a gusset plate, the fire resistance must be ensured also at the joint portion between the beam members. Therefore, the gusset plate must be accommodated so as to be covered with a fireproof coating layer (a flame stop layer and a burnup layer) provided on the outer peripheral portion of the first beam member.

  For this reason, a hole or nut for inserting a bolt for fixing the gusset plate to the load support layer of the first beam member is formed in the fireproof coating layer of the first beam member, or a notch portion for fixing the gusset plate to the load support layer of the first beam member. A space to be accommodated must be formed in the load support layer of the first beam member, or after the nut is accommodated in this space, a process of covering this space with a fireproof covering material must be performed. That is, a complicated process must be performed on the beam member.

JP 2008-2189 A

  This invention considers the fact which concerns, and makes it a subject to join beam members, without giving a complicated process to a beam member.

  According to a first aspect of the present invention, there is provided a beam connection structure in which a first beam member and a wooden second beam member arranged to intersect with the first beam member are fixed to the second beam member. A connecting plate having a fixed plate protruding from the upper surface of the second beam member; and a support plate extending from the fixed plate and mounted and fixed on the upper surface of the first beam member.

  According to the beam joint structure according to the first aspect, the support plate portion that is fixed to the second beam member and protrudes from the fixed plate portion protruding from the upper surface of the second beam member is placed on the upper surface of the first beam member. The second beam member can be joined to the first beam member simply by fixing. Therefore, it is possible to join the beam members without performing complicated processing on the beam members.

  The beam joint structure according to the second aspect is the beam joint structure according to the first aspect, wherein the first beam member and the second beam member are a wooden load support part for supporting a load and an outer side of the load support part. And a fireproof coating layer provided on the surface.

  According to the beam joining structure which concerns on a 2nd aspect, a wooden 1st beam member and a wooden 2nd beam member can be joined, without giving a complicated process to a beam member.

  The beam joint structure according to the third aspect is the beam joint structure according to the first or second aspect, wherein the second beam member is abutted from both sides to both side surfaces of the first beam member. The support plate portion of one of the connection plates and the support plate portion of the other connection plate are connected upward.

  According to the beam joint structure according to the third aspect, the second beam member with respect to the first beam member is formed by connecting the support plate of one connection plate and the support plate of the other connection plate above the first beam member. The rotation of the end portion (joint portion) of the second beam member is suppressed, and the amount of bending deformation of the second beam member can be reduced.

  Since this invention set it as the said structure, beam members can be joined, without giving a complicated process to a beam member.

It is side surface sectional drawing which shows the beam junction structure which concerns on embodiment of this invention. It is a top view which shows the beam junction structure which concerns on embodiment of this invention. It is side surface sectional drawing which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is a top view which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is side surface sectional drawing which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is a top view which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is side surface sectional drawing which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is side surface sectional drawing which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is side surface sectional drawing which shows the variation of the beam junction structure which concerns on embodiment of this invention. It is a side view which shows the connection plate which concerns on embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. First, a beam joint structure according to an embodiment of the present invention will be described.

  As shown in the side sectional view of FIG. 1 and the plan view of FIG. 2, the beam joint structure 10 of this embodiment includes a wooden large beam 12 as a first beam member and a wooden small beam as a second beam member. 14 and a connecting plate 16 made of steel.

  The small beams 14 are arranged so as to intersect with the large beams 12 in a plan view and are joined to the large beams 12. Further, floor slabs 18 made of reinforced concrete are provided on the upper surfaces of the small beam 14 and the large beam 12. For convenience of explanation, the floor slab 18 is not shown in FIG.

  The girder 12 includes a wooden load support portion 20 that supports a load, and a fireproof coating layer 22 that is provided outside the load support portion 20 so as to surround a side surface and a lower surface of the load support portion 20. Has been.

  The fireproof coating layer 22 surrounds the flame stop layer 24 provided outside the load support portion 20 so as to surround the side surface and the lower surface of the load support portion 20, and surrounds the side surface and the lower surface of the flame stop layer 24. A burn-up layer 26 provided outside the burn-out stop layer 24 is provided. That is, the large beam 12 is a member having fire resistance.

  The small beam 14 includes a wooden load support portion 28 that supports a load, and a fireproof coating layer 30 that is provided outside the load support portion 28 so as to surround a side surface and a lower surface of the load support portion 28. It is configured. The fireproof covering layer 30 surrounds the flame stop layer 32 provided outside the load support portion 28 so as to surround the side surface and the lower surface of the load support portion 28, and the side surface and the lower surface of the flame stop layer 32. And a burnup allowance layer 34 provided outside the burnout stop layer 32. That is, the small beam 14 is a member having fire resistance.

  The flame stop layer 24 is formed by alternately arranging wooden plate members 36 and plate members 38 formed of mortar. The plate member 38 may be formed of a material other than mortar as long as it can absorb heat.

  In the girder 12, a flame ignites the burning allowance layer 26 at the time of a fire, and the burning allowance layer 26 burns. The burned burnup layer 26 is carbonized. Thereby, the burning allowance layer 26 which carbonized heat transfer from the outside of the large beam 12 to the load supporting portion 20 is suppressed, and the burning stop layer 24 absorbs heat. Therefore, the temperature rise of the load support part 20 can be suppressed at the time of fire and after the end of the fire, and the load can be supported by the load support part 20.

  Further, in the small beam 14, a flame ignites the burning allowance layer 34 at the time of a fire, and the burning allowance layer 34 burns. The burned burnup layer 34 is carbonized. Thereby, the burning allowance layer 34 which carbonized heat transfer from the outside of the small beam 14 to the load support portion 28 is suppressed, and the burning stop layer 32 absorbs heat. Therefore, the temperature rise of the load support part 28 can be suppressed at the time of fire and after the end of the fire, and the load can be supported by the load support part 28.

  The connecting plate 16 is a member configured integrally with a rectangular fixed plate portion 40 made of a steel plate and a rectangular support plate portion 42 made of a steel plate.

  The fixed plate portion 40 is inserted into a slit 44 formed substantially vertically downward from the upper surface of the load support portion 28 constituting the small beam 14, and is fixed to the load support portion 28 by a drift pin 46. It is embedded in the beam 14 and is provided on the small beam 14 so that the upper portion protrudes from the upper surface of the load support portion 28.

  The support plate portion 42 extends laterally from the fixed plate portion 40, is placed on the upper surface of the load support portion 20 constituting the large beam 12, and a flange 48 provided at the lower portion of the support plate portion 42 is loaded with a lag screw 50. By being fixed to the support portion 20, it is fixed to the large beam 12.

  The connecting plate 16 is fixed to the small beam 14 in advance in a factory, a temporary yard or the like, and when the small beam 14 is joined to the large beam 12, the connecting plate 16 provided on the small beam 14 is changed to the large beam 12. Join.

  The upper part of the fixed plate part 40 protruding from the upper surface of the load support part 28 and the support plate part 42 are embedded in the floor slab 18. The floor slab 18 absorbs heat generated in the connecting plate 16 by the heat absorption effect of the concrete floor slab 18 having a large heat capacity. As a result, it is possible to suppress the transfer of heat between the small beam 14 and the large beam 12 as the connection plate 16 becomes a heat bridge.

  A mortar 52 is filled and hardened in a gap formed between the outer surface of the burning allowance layer 26 constituting the large beam 12 and the end surfaces of the load supporting portion 28 and the burning stop layer 32 constituting the small beam 14. Further, rock wool 54 is provided in a gap between the outer surface of the burning allowance layer 26 constituting the large beam 12 and the end face of the burning allowance layer 34 constituting the small beam 14 so as to surround the side surface and the lower surface of the mortar 52. Is provided. The rock wool 54 suppresses the entry of flame and heat into the inside through a gap between the outer surface of the burn allowance layer 26 constituting the large beam 12 and the end face of the burn allowance layer 34 constituting the small beam 14. Instead of filling the gap formed between the outer surface of the burning allowance layer 26 constituting the large beam 12 and the end surfaces of the load support portion 28 and the burning stop layer 32 constituting the small beam 14 with a small amount of mortar 52. You may make it provide the end plate which has the fire resistance formed with the mortar etc. in the end surface of the load support part 28 which comprises the beam 14. FIG.

  Next, the operation and effect of the beam joint structure according to the embodiment of the present invention will be described.

  In the beam joint structure 10 of the present embodiment, as shown in FIGS. 1 and 2, the support plate portion 42 that is fixed to the small beam 14 and protrudes from the fixed plate portion 40 that protrudes from the upper surface of the small beam 14 is provided with the large beam 12 ( The wooden small beam 14 can be joined to the wooden large beam 12 only by being placed and fixed on the upper surface of the load supporting portion 20). Therefore, it is possible to join the beam members without performing complicated processing on the beam members.

  For example, a gusset plate is attached to the side surface of the load support portion 20 constituting the large beam 12, and the gusset plate is inserted into a slit formed substantially vertically downward from the upper surface of the load support portion 28 constituting the small beam 14, In the case of a conventional beam joining structure in which the small beam 14 is joined to the large beam 12 by fixing the gusset plate to the load support portion 28 with a drift pin, a notch portion for accommodating the gusset plate in the fireproof covering layer 22 constituting the large beam 12 Or a space for accommodating a bolt hole for fixing the gusset plate to the load support portion 20 constituting the girder 12 and a nut fastened to the bolt in the load support portion 20. After the nut is received, the space must be covered with a fireproof covering material. That is, the large beam 12 must be subjected to complicated processing.

  In contrast, in the beam joint structure 10 of the present embodiment, the support plate portion 42 of the connection plate 16 is attached to the upper surface of the load support portion 20 constituting the large beam 12 by the lag screw 50 without performing such complicated processing. The small beam 14 can be fixed to the large beam 12 only by fixing, and it is not necessary to perform processing for joining the small beam 14 to the large beam 12.

  Moreover, in the beam joint structure 10 of this embodiment, as shown in FIG.1 and FIG.2, the support plate part 42 which protruded from the fixed plate part 40 fixed to the small beam 14 and protruded from the upper surface of the small beam 14 is made into a large beam. 12 (load support portion 20) is placed and fixed on the upper surface, so that when the small beam 14 is joined to the large beam 12, the small beam 14 is moved to the joining position with respect to the large beam 12 by dropping the small beam 14 from above. Can be arranged.

  The embodiment of the present invention has been described above.

  In this embodiment, as shown in FIGS. 1 and 2, the beam joint structure 10 includes a wooden large beam 12 as a first beam member and a wooden small beam 14 as a second beam member. However, if the second beam member is a wooden beam member, the first beam member may have another structure.

  For example, as shown in the side sectional view of FIG. 3 and the plan view of FIG. 4, the steel beam 56 as the first beam member, the wooden beam 58 as the second beam member, and the steel connection It is good also as the beam junction structure 62 comprised including the plate 60. FIG.

  The small beams 58 are arranged so as to intersect with the large beams 56 in a plan view and are joined to the large beams 56. Further, floor slabs 18 made of reinforced concrete are provided on the upper surfaces of the small beam 58 and the large beam 56. For convenience of explanation, the floor slab 18 is not shown in FIG.

  The large beam 56 is made of H-shaped steel, and is provided with a fireproof coating layer 64 made of a calcium silicate plate so as to surround the side surface and the lower surface of the large beam 56. In addition, the fireproof coating layer 64 may be comprised with the other material which has fire resistance. For example, the fireproof coating layer 64 may be composed of a dry rock wool sheet, a high heat resistant rock wool sheet, a thermal expansion sheet, a gypsum board, a wet spray rock wool, a fireproof paint, or the like.

  The configuration of the small beam 58 is the same as the configuration of the small beam 14 shown in FIGS. 1 and 2, and the configuration of the connecting plate 60 is the same as the configuration of the connecting plate 16 shown in FIGS. 1 and 2. It has become.

  The support plate portion 42 constituting the connection plate 60 extends laterally from the fixed plate portion 40 and is placed on the upper surface of the upper flange portion 66 constituting the large beam 56 and provided below the support plate portion 42. The flange 48 is fixed to the large beam 56 by joining the upper flange portion 66 with a bolt 68 and a nut 70.

  The upper part of the fixed plate part 40 protruding from the upper surface of the load support part 28 constituting the small beam 58 and the support plate part 42 are embedded in the floor slab 18.

  Mortar 52 is filled and hardened in the gap formed between the outer surface of the fireproof covering layer 64 and the end surfaces of the load support portion 28 and the flame stop layer 32 constituting the small beam 58. In addition, rock wool 54 is provided in a gap between the outer surface of the fireproof coating layer 64 and the end surface of the burning allowance layer 34 constituting the small beam 58 so as to surround the side surface and the lower surface of the mortar 52. .

  In the beam connection structure 62, the large beam 56 and the load support portion 28 of the small beam 58 are fireproof coating layers (the large beam 56 is the fireproof coating layer 64 and the load support portion 28 of the small beams 58 is the fireproof coating layer 30) and the floor slab. 18, the fireproof covering layer 64 of the large beam 56 only needs to satisfy the fireproof performance standard of the steel frame, and the fireproof covering layer 30 of the small beam 58 is fireproof performance of the wood. It only needs to satisfy the standard. This eliminates the need to increase the fireproof performance of the fireproof coating layer 64 of the girder 56 in accordance with the fireproof performance standards of wood.

  Further, for example, as shown in the side sectional view of FIG. 5 and the plan view of FIG. 6, a steel small beam 72 as a first beam member, a wooden large beam 74 as a second beam member, and a steel It is good also as the beam junction structure 78 comprised including this.

  The small beams 72 are arranged so as to intersect with the large beams 74 in a plan view, and are joined to the large beams 74. Further, floor slabs 18 made of reinforced concrete are provided on the upper surfaces of the small beam 72 and the large beam 74. For convenience of explanation, the floor slab 18 is not shown in FIG.

  The small beam 72 is made of H-shaped steel, and is provided with a fireproof coating layer 80 made of a calcium silicate plate so as to surround the side surface and the lower surface of the small beam 72. The structure of the fireproof coating layer 80 is the same as that of the fireproof coating layer 64 shown in FIGS. 3 and 4. The configuration of the large beam 74 is the same as that of the large beam 12 shown in FIGS. 1 and 2.

  The connection plate 76 includes a rectangular fixed plate portion 82 made of a steel plate and a rectangular support plate portion 84 made of a steel plate.

  The fixing plate portion 82 is fixed to the upper surface of the load support portion 20 constituting the large beam 74 by fixing the flange 86 provided in the lower portion with the lag screw 50 so as to protrude from the upper surface of the load support portion 20. It is fixed to.

  The support plate portion 84 projects laterally from the fixed plate portion 82, is placed on the upper surface of the upper flange portion 88 of the small beam 72, and is fixed to the small beam 72 by welding the lower end portion to the upper surface of the upper flange portion 88. ing. The fixed plate portion 82 and the support plate portion 84 are embedded in the floor slab 18.

  A mortar 52 is filled and hardened in a gap formed between the outer surface of the burning allowance layer 26 constituting the large beam 74 and the end surface of the small beam 72. Further, rock wool 54 is provided in a gap between the outer surface of the burning allowance layer 26 and the end surface of the fireproof coating layer 80 so as to surround the side surface and the lower surface of the mortar 52.

  In the beam joint structure 78, the small beam 72 and the load support portion 20 of the large beam 74 are fireproof coating layers (the small beam 72 is the fireproof coating layer 80, the load support portion 20 of the large beams 74 is the fireproof coating layer 22) and the floor slab. 18, the fireproof coating layer 80 of the small beam 72 only needs to satisfy the fireproof performance standard of the steel frame, and the fireproof coating layer 22 of the large beam 74 is fireproof performance of the wood. It only needs to satisfy the standard. Thereby, it is not necessary to raise the fire resistance of the fireproof covering layer 80 of the small beam 72 in accordance with the fireproof performance standard of wood.

  Moreover, in this embodiment, as shown in FIG.1 and FIG.2, the example of the beam joining structure 10 which joined the small beam 14 arrange | positioned so that it cross | intersects so that it may cross substantially substantially the large beam 12 by planar view may be connected to the large beam 12. However, as shown in the side sectional view of FIG. 7, the beam joining structure 10 causes the small beams 14 (hereinafter referred to as “small beams 14A” to be formed on both sides of the large beam 12 as the first beam member. 14B ”may be arranged so as to face each other, and the small beams 14A and 14B may be joined to the large beam 12, respectively.

  Further, as in the beam joint structure 90 shown in the side sectional view of FIG. 8, the small beams 14 (hereinafter referred to as “small beams 14C and 14D”) are formed on both sides of the large beam 12 as the first beam member. Are arranged so as to face each other, and the small beams 14C and 14D are joined to the large beam 12, respectively, and one connection plate 16 (provided on the small beam 14C) above the large beam 12 (hereinafter referred to as " The support plate portion 42 of the connection plate 16C ”and the support plate portion 42 of the other connection plate 16 (provided on the small beam 14D) (hereinafter referred to as“ connection plate 16D ”) are made of steel plates. You may make it connect with the plate-shaped connection member 92. FIG.

  The connection plate 16C and the connection plate 16D are formed by bolting the support plate portion 42 of the connection plate 16C to the left end portion of the connection member 92 and bolting the support plate portion 42 of the connection plate 16D to the right end portion of the connection member 92. Are connected by

  In the beam connection structure 90, the end portions of the small beams 14C and 14D with respect to the large beam 12 are connected to the support plate portion 42 of the one connection plate 16C and the support plate portion 42 of the other connection plate 16D above the large beam 12. The rotation of the (joining portion) is suppressed, and the amount of bending deformation of the small beams 14C and 14D can be reduced.

  Further, the L-shaped connecting plate 16 shown in FIG. 8 may be a T-shaped steel connecting plate 96 as in the beam joint structure 94 shown in the side sectional view of FIG.

  As shown in the side views of FIGS. 9 and 10, the connecting plate 96 includes a rectangular fixed plate portion 98 made of a steel plate, a rectangular support plate portion 100 made of a steel plate, and a rectangular support plate portion 102 made of a steel plate. Is a T-shaped member that is integrally provided.

  The fixed plate portion 98 is inserted into a slit formed substantially vertically downward from the upper surface of the load support portion 28 constituting the small beam 14, and is fixed to the load support portion 28 by the drift pin 46, thereby the small beam. 14 and is provided on the small beam 14 so that the upper portion protrudes from the upper surface of the load support portion 28.

  The support plate part 100 projects laterally from the fixed plate part 98 and is placed on the upper surface of the load support part 20 constituting the large beam 12, and the flange 48 provided at the lower part of the support plate part 100 is loaded by the lag screw 50. By being fixed to the support portion 20, it is fixed to the large beam 12.

  The support plate portion 102 extends from the fixed plate portion 98 to the side opposite to the support plate portion 100, and a flange 104 provided at a lower portion of the end portion of the support plate portion 102 in the extending direction constitutes the small beam 14. It is fixed to the small beam 14 by being fixed to the upper surface of the load support portion 28 with a lag screw 50. Thereby, when the edge part of the support plate part 102 receives a couple of forces, rotation of the edge part (joint part) of the small beam 14 can be suppressed more.

  Furthermore, in this embodiment, as shown in FIG.1 and FIG.2, although the load support parts 20 and 28, the board member 36, and the burning allowance layers 26 and 34 were shown as the example, the load support part 20, 28, the plate member 36, and the burning allowance layers 26 and 34 should just be formed with the timber. For example, the load support portions 20 and 28, the plate member 36, and the burning margin layers 26 and 34 are timber (hereinafter referred to as “general timber”) used in general wooden buildings such as Yonematsu, Karamatsu, firewood, cedar, and Asunaro. May be formed by processing these general timbers into a prismatic single material, and by assembling a plurality of such single materials and bonding them together with an adhesive. .

  Moreover, in this embodiment, as shown in FIG.1 and FIG.2, the flame stop layers 24 and 32 were formed by arrange | positioning alternately the wooden board member 36 and the board member 38 formed with the mortar. Although an example has been shown, the flame stop layers 24 and 32 may be layers that can suppress the flame and heat from entering and exhibit a flame stop effect. For example, the flame stop layers 24 and 32 may be any layer having flame retardancy or a layer capable of absorbing heat.

  Examples of the flame retardant layer include a flame retardant chemical injection layer obtained by injecting a flame retardant chemical into wood and making it incombustible. The layer capable of absorbing heat may be formed of a material having a larger heat capacity than general wood, a material having higher thermal insulation than general wood, or a material having higher thermal inertia than general wood. You may form in combination with general wood.

  Examples of materials having a larger heat capacity than general wood include inorganic materials such as mortar, stone, glass, fiber reinforced cement, and plaster, and various metal materials. Examples of the material having higher heat insulation than general wood include calcium silicate board, rock wool, and glass wool. Examples of the material having higher thermal inertia than general wood include wood such as Selangan Batu, Jara, and Bongoshi.

  Furthermore, in this embodiment, as shown in FIG.1 and FIG.2, the big beam 12 as a 1st beam member is provided with the load support part 20, the burning stop layer 24, and the burning allowance layer 26, and is used as a 2nd beam member. In this example, the small beam 14 includes the load support portion 28, the flame stop layer 32, and the burn allowance layer 34. However, the first beam member and the second beam member include a wooden load support portion and a load support portion. What is necessary is just to be comprised including the fireproof coating layer which has the fire resistance provided in the outer side of the part.

  The fireproof coating layer may be composed of, for example, only the flame stop layer, or may be composed of only the burn-off layer, or other than the burn-off layer and the burn-off layer provided outside the flame stop layer. Layers (eg, thin wooden finishes) may be used.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

10, 62, 78, 90, 94 Beam joint structure 12, 56 Large beam (first beam member)
14, 14A, 14B, 14C, 14D, 58 Small beam (second beam member)
16, 16C, 16D, 60, 76, 96 Connecting plate 20, 28 Load support part 22, 30 Fireproof coating layer 40, 82, 98 Fixed plate part 42, 84, 100 Support plate part 72 Small beam (first beam member)
74 Large beam (second beam member)

Claims (3)

In the beam joining structure for joining the first beam member and the wooden second beam member arranged to intersect the first beam member,
A fixed plate portion fixed to the second beam member and projecting from an upper surface of the second beam member; and a support plate portion protruding from the fixed plate portion and mounted and fixed on the upper surface of the first beam member. Beam connection structure with connecting plate.   2. The beam according to claim 1, wherein each of the first beam member and the second beam member includes a wooden load support portion that supports a load, and a fireproof coating layer provided outside the load support portion. Joining structure.   The second beam member is abutted against both side surfaces of the first beam member from both sides, and the support plate portion of one of the connection plates and the support plate portion of the other of the connection plates above the first beam member. And the beam connection structure according to claim 1 or 2.