JP2016211327A - Joining structure and joining method between fire resistant construction material beam and concrete slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easy-to-construct joining structure between a fire resistant construction material beam and a concrete slab.SOLUTION: A joining structure between a fire resistant construction material beam and a concrete slab comprises: a fire resistant construction material beam made of a fire resistant construction material having a load support layer which is manufactured by layering a plurality of wooden plate materials and integrating the same with a binding material and provided with an open top concave section concaved on an interface of one of the wooden plate materials next to each other in a direction away from the interface of the other wooden plate, a fire resistant layer arranged on both side faces and a bottom face of the load support layer, and a burning allowance layer arranged on both side faces and the bottom face of the fire resistant layers; a joining member which has a steel plate, fitted into the concave section, provided with an upwardly protruded protrusion section and a metallic rod member installed at the protrusion section of the steel plate and protruded in a direction intersecting a surface of the steel plate; and a concrete slab with the protrusion section and the rod member embedded therein. Upper surfaces of the load support layer, the fire resistant layer and the burning allowance layer are covered by the concrete slab.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a joining structure between a refractory structural material beam and a concrete slab and a joining method between the refractory structural material beam and a concrete slab.

  As a joint structure between a refractory structural beam and a concrete slab, for example, on the upper surface of a beam core material that is formed by combining multiple single materials and bonding them together, it is arranged at approximately equal intervals along the longitudinal direction of the beam core material. A concave portion is formed by fixing a plurality of square-shaped single materials arranged and a single material arranged so as to be substantially orthogonal to the single material, and concrete is placed thereon to form a floor slab. A beam floor joint structure is known (see, for example, Patent Document 1).

JP 2012-241506 A

  In order to form a recess in the upper surface of the beam core material, the beam floor joint structure as described above has to be arranged and fixed with a large number of single materials, and the work is complicated and requires a lot of time. There are challenges.

  The present invention has been made in view of such conventional problems, and the object of the present invention is to provide a joint structure between a refractory structural material beam and a concrete slab that is easy to construct, and a refractory structural material beam and a concrete slab. It is to provide a joining method.

In order to achieve such an object, the joint structure of the refractory structural material beam and the concrete slab of the present invention has a structure in which a plurality of wooden boards are laminated and integrated by a binding material, one of the adjacent wooden boards, the other A load bearing layer having a recess that is recessed in a direction away from the other facing surface and opened upward on the facing surface facing
A flame stop layer disposed across both side surfaces and the lower surface of the load support layer; and
A burnt layer made of a wood material disposed over both sides and the lower surface of the flame stop layer,
A refractory structural beam comprising a refractory structural material with
A joining member having a steel plate having a protruding portion that is fitted in the concave portion and protrudes upward, and a steel rod-like member that is provided in the protruding portion of the steel plate and protrudes in a direction intersecting the surface of the steel plate; ,
A concrete slab in which the protrusion and the rod-shaped member are embedded,
The upper surfaces of the load support layer, the flame stop layer, and the burn-off layer are covered with the concrete slab, which is a joining structure of a refractory structural material beam and a concrete slab.

  According to such a joining structure of the refractory structural material beam and the concrete slab, the steel plate provided with the steel rod-like member embedded in the concrete slab is placed in the recess provided in the load supporting layer of the refractory structural material beam. Since it is made to protrude and is fitted, it is possible to strongly join the fire-resistant structural material beam and the concrete slab with a simple configuration, and it is possible to easily perform the construction. Moreover, a recessed part is recessedly formed in the direction which leaves | separates from the other opposing surface in the opposing surface which opposes the other of one of the adjacent wooden board | plate materials. That is, since the concave portion is formed on the side surface of the wooden board, it can be formed with high accuracy, and can include a joining member fitted with high strength. For this reason, it is possible to join a fireproof structural material beam and a concrete slab more firmly. Moreover, since a joining member is a rod-shaped member which protrudes in the direction which cross | intersects the surface of a steel plate and a steel plate, it can resist larger shear force.

A joining structure of such a refractory structural beam and a concrete slab,
The load support layer has a pair of end plate portions made of the wood plate material facing each other, and an inner wood portion made of the wood plate material provided between the pair of end plate portions,
It is desirable that the concave portion is provided on one of the adjacent end plate portion and the inner wooden portion on both sides of the inner wooden portion.

  According to such a joining structure of the refractory structural material beam and the concrete slab, the recesses provided on both sides of the inner wooden part of the load supporting layer in which the pair of end plate parts and the inner wooden part are integrated by the binding material. Since the joining members are fitted to each other, it is possible to join the refractory structural material beam and the concrete slab more firmly.

A joining structure of such a refractory structural beam and a concrete slab,
The rod-shaped member is preferably a stud provided on the steel plate.

  According to the joining structure of such a refractory structural material beam and a concrete slab, since the joining member is a steel plate and a stud provided on the steel plate, the refractory structural material can be more easily obtained by simply fitting the steel plate provided with the stud. It is possible to provide a joining member on the beam.

A joining structure of such a refractory structural beam and a concrete slab,
The steel plate has a through hole in the protruding portion,
The rod-shaped member is preferably a steel rod that is penetrated through the through-hole and locked to the steel plate by a locking member.

  According to such a joining structure of a refractory structural material beam and a concrete slab, a refractory structural material beam can be easily obtained simply by passing a steel rod through a through hole provided in a protruding portion of a steel plate and locking it with a locking member. It is possible to provide a joining member. Moreover, since it is a steel plate and a steel bar, it is easy to arrange members and manage inventory.

In addition, one of the two wooden boards facing each other and having a plurality of laminated wooden boards is recessed in a direction facing away from the other facing away from the other facing face and opened upward Forming a recessed portion, forming a load support layer for supporting the load by integrating the plurality of wood board materials by laminating and binding the binding material;
Forming a flame stop layer over both side surfaces and the lower surface of the load supporting layer;
A refractory structural beam forming step for forming a refractory structural beam by forming a burn-off layer over both sides and the lower surface of the flame stop layer; and
A joining member mounting step for fitting a joining member having a steel bar and a steel rod-like member projecting in a direction intersecting with the surface of the steel sheet into the recess of the fireproof structural material beam; and
A slab formation step of embedding concrete by burying the reinforcing bar and the joining member projecting on the refractory structural material beam;
It is a joining method of a refractory structural material beam and a concrete slab characterized by having.

  According to such a method of joining a refractory structural material beam and a concrete slab, a steel plate provided with a steel rod-like member embedded in the concrete slab is placed in a recess provided in a load supporting layer of the refractory structural material beam. Since it is only projected and fitted, it can be easily attached. In addition, the concave portion is formed so as to be recessed in the facing surface facing the other one of the adjacent wooden boards in the direction away from the other facing surface, so it is more easily and accurately formed. It is possible.

  ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the joining structure of a refractory structural material beam and a concrete slab, and the joining method of a refractory structural material beam and a concrete slab which are easy to construct.

It is a figure which shows one Embodiment of a refractory structure material. It is a perspective view which shows one Example of the refractory structure material beam provided with the joining member. It is the longitudinal cross-sectional view fractured | ruptured in the longitudinal direction of the fire-resistant structural material beam which shows one Example of the joining structure of a fire-resistant structural material beam and a concrete slab. It is the longitudinal cross-sectional view fractured | ruptured along the lamination direction which showed one Example of the joining structure of a refractory structural material beam and a concrete slab. It is a figure which shows the joining method of a refractory structural material beam and a concrete slab. It is a perspective view which shows the other Example of a joining member. It is the longitudinal cross-sectional view fractured | ruptured along the lamination direction which showed the other Example of the securing member. It is the longitudinal cross-sectional view which fractured | ruptured along the lamination direction which showed the Example of the joining member comprised with the steel plate of 1 sheet.

  Hereinafter, an embodiment according to the present invention will be described in detail with reference to the drawings.

  First, the refractory structural material forming the refractory structural material beam to be joined to the concrete slab will be described.

  FIG. 1 is a view showing an embodiment of a refractory structural material. The fire-resistant structural material 1 of the present embodiment forms a core portion and supports a load. The load-supporting layer 2 is made of a wood material, and the fire is made of a fire-resistant material that is disposed over both side surfaces and the lower surface of the load-supporting layer 2 A stop layer 3 and a burn-off layer 4 made of a wood material disposed over both side surfaces and the lower surface of the stop layer 3 are provided. That is, the flame stop layer 3 and the burnout layer 4 are not provided on the upper surface of the present refractory structural material, and the flame stop layer 3 provided on the upper surface of the load support layer 2 and on both sides of the load support layer 2. And the upper edge of the burnout layer 4 is exposed.

  The load support layer 2 has a substantially rectangular cross section, and a plurality of wood blocks 21 as a wood board material such as lumber, laminated wood, LVL, etc. are laminated, and a screw 5 as a binding material in the laminated direction in which they are laminated. Is intruded and integrated. In the following description, the load supporting layer 2 is formed, and among the laminated wood blocks 21, two wood blocks 21 positioned at both ends in the stacking direction are referred to as end plate portions 21a, respectively, One or more wood blocks 21 located between the end plate portions 21a are referred to as an inner wood portion 21b. In other words, the load supporting layer 2 is integrated by joining the pair of end plate portions 21a and the inner wood portion 21b with the screws 5 extending between the pair of end plate portions 21a. Here, the wood block 21 which comprises the inner side wood part 21b may be single, or may be laminated | stacked by two or more.

  The flame stop layer 3 is provided with a gypsum board as a refractory material on both side surfaces and the lower surface so as to cover the both side surfaces and the lower surface of the load support layer 2 with screws. Here, the member forming the flame stop layer 3 is not limited to a gypsum board, but, for example, mortar which is a high heat capacity material, stone material, glass, inorganic materials such as fiber reinforced cement, various metal materials, hollow rectangular cross-section Incorporating inorganic materials, liquid metals, water, inorganic hydrated salts, heat storage materials such as slaked lime into metal pipes, etc., or non-combustible wood, flame-retardant treatment materials, silicic acid as heat insulation materials It may be a calcium plate, rock wool, glass wool or the like, or a selangan bat, jala, bongoshi or the like which is a wood having a large thermal inertia.

  The burnout layer 4 has both side surfaces so that a wooden material composed of a plurality of single materials such as a grinder or a single plate (LVL) similar to the load supporting layer 2 covers the both sides and the lower surface of the flame stop layer 3. It is attached to the lower surface with an adhesive.

  FIG. 2 is a perspective view showing an embodiment of a refractory structural beam provided with a joining member. FIG. 3 is a longitudinal sectional view showing an embodiment of a joining structure of a refractory structural material beam and a concrete slab, broken in the longitudinal direction of the refractory structural material beam. FIG. 4 is a longitudinal sectional view taken along the laminating direction showing an embodiment of a joining structure of a refractory structural material beam and a concrete slab.

  In the present embodiment, as shown in FIGS. 2 to 4, a plurality of joining members 7 are provided on the refractory structural material beam 6 made of the above-mentioned refractory structural material at appropriate intervals in the longitudinal direction. A reinforced concrete concrete slab 8 is provided on the refractory structural material beam 6 by embedding the protruding portion 7c of the protruding joining member 7.

  The joining member 7 includes a steel plate 7a fitted with a protruding portion 7c protruding above the fireproof structural material beam 6, and a steel rod 7b that is penetrated through a through hole 7d provided in the protruding portion 7c. Yes. The steel rod 7b is fixed to the steel plate 7a by a wire (not shown) as a locking member.

  Each of the pair of end plate portions 62a adjacent to the inner wood portion 62b of the fire-resistant structural beam 6 is recessed in the direction facing away from the inner wood portion 62b on the opposing surface facing the inner wood portion 62b, and the upper side is opened and joined. A recess 62c is formed in which the steel plate 7a of the member 7 is fitted from above. The recesses 62c are provided at positions where the steel plates 7a fitted to the recesses 62c face each other on both sides with the inner wood part 62b interposed therebetween. The width of each recess 62c in the stacking direction is formed slightly narrower than the thickness of the steel plate 7a to be fitted, and the fitted steel plate 7a is fitted with high strength.

  The steel plates 7a fitted in the respective recesses 62c are arranged so that a single steel rod 7b can pass through the through holes 7d provided in the protruding portions 7c of the two steel plates 7a facing each other in the stacking direction. .

  Reinforcing bars 9 are arranged on the refractory structural material beam 6 above and below the steel rod 7b fixed to the steel plate 7a, in a direction along the refractory structural material beam 6 and in a direction substantially perpendicular thereto, Concrete is cast and a concrete slab 8 is formed. At this time, the lower surface 8a of the concrete slab 8 is in contact with the upper edges of the load support layer 62, the flame stop layer 63, and the burnout layer 64 of the refractory structural beam 6, and the load support layer 62 is connected to the flame stop layer 63, It is covered with the burnt layer 64 and the concrete slab 8.

  According to the joint structure of the refractory structural material beam 6 and the concrete slab 8 of this embodiment, the joint member 7 embedded in the concrete slab 8 together with the reinforcing bar 9 is provided on the load support layer 62 of the refractory structural material beam 6. Since the steel plate 7a and the steel rod 7b are protruded and fitted into the recess 62c, the fireproof structural material beam 6 and the concrete slab 8 can be firmly joined by a member having a simple configuration. Further, since the joining member 7 is constituted by the steel plate 7a and the steel rod 7b, it is easy to arrange members, manage inventory, and the like.

  Moreover, since the joining member 7 is attached to the refractory structural material beam 6 simply by fitting the steel plate 7a to the refractory structural material beam 6 and passing the steel rod 7b through the fitted steel plate 7a and fixing the steel material 7a. It can be easily and reliably installed in time. In addition, since the two steel plates 7a of the joining member 7 are fitted in the recesses 62c respectively provided in the pair of end plate portions 62a on both sides of the inner wood portion 62b of the load support layer 62, the refractory structural material beam 6 and It is possible to join the concrete slab 8 more firmly.

  Moreover, since the joining member 7 is comprised by the steel rod 7b which protrudes in the direction which cross | intersects the surface of the steel plate 7a and the steel plate 7a, it is possible to resist a larger shear force than the case of only a stud bolt, for example. .

  Next, an embodiment of a method for joining the refractory structural beam 6 and the concrete slab 8 will be described. FIG. 5 is a diagram showing a method of joining a refractory structural material beam and a concrete slab.

  When joining the refractory structural material beam 6 and the concrete slab 8, the refractory structural material beam 6 having the concave portion 62c is formed (the refractory structural material beam forming step S1), and the concave portion 62c of the refractory structural material beam 6 is formed. When the joining member 7 is attached (joining member attaching step S2), the rebar 9 is disposed above the refractory structural beam 6 and concrete is placed to form a concrete slab 8 (slab forming step S3).

  In the fire-resistant structural beam forming step S1, first, the inner wooden portion 62b of the wooden block 21 that is disposed at both ends in the stacking direction of the plurality of wooden blocks 21 that form the load support layer 62 and forms a pair of end plate portions 62a. A concave portion 62c for fitting the steel plate 7a is formed on the opposing surface facing the wood block 21 forming the structure. At this time, a plurality of the recesses 62c are provided in each end plate part 62a at appropriate intervals along the longitudinal direction. Moreover, the recessed part 62c is slightly shallower than the thickness of the steel plate 7a, and is provided in the side surface of each end plate part 62a. Furthermore, when the steel plate 7a is fitted in the recess 62c, the upper portion of the steel plate 7a provided with the through hole 7d is formed so as to protrude above the refractory structural material beam 6.

  Next, the inner wood portion 62b is interposed between the pair of end plate portions 62a, the pair of end plate portions 62a and the inner wood portion 62b are stacked, and the inner wood portion 62b and the end plate portion 62a are secured by screws 5 while avoiding the recess 62c. And the load supporting layer 62 is formed. At this time, the pair of end plate portions 62a and the inner wood portion 62b are arranged so that the concave portions 62c provided in the pair of end plate portions 62a are arranged in the stacking direction.

  Next, a gypsum board is fixed to both side surfaces and the lower surface of the load support layer 62 with screws to form a flame stop layer 63. At this time, so that there is no gap between the gypsum board on the side and the gypsum board on the bottom, that is, the gypsum board on the side and the gypsum board on the bottom are in contact with each other so that the gypsum board spans both sides and the bottom Deploy.

  Next, the wood block 21 is adhered to both side surfaces and the lower surface of the flame stop layer 63 to form the burnout layer 64. At this time, a gap is not formed between the wooden block 21 on the side surface and the wooden block 21 on the lower surface, that is, the wooden block 21 on the side surface and the wooden block 21 on the lower surface are in contact with each other, Arrange so as to extend across the bottom surface.

  In the joining member attaching step S2, first, the steel plate 7a of the joining member 7 is fitted into the recess 62c of the refractory structural material beam 6 carried into the construction site together with the joining member 7. Next, the steel rod 7b is passed through the through-holes 7d of the two steel plates 7a facing each other and fitted in the concave portions 62c formed side by side in the stacking direction, and the steel rod 7b is fixed to the steel plate 7a with a wire or the like.

  In the slab forming step S3, a mold (not shown) for forming the concrete slab 8 is disposed between the plurality of refractory structural beams 6 and at a position higher and lower than the steel rod 7b of the joining member 7. The reinforcing bars 9 are arranged in the longitudinal direction of the refractory structural beam 6 and the direction substantially perpendicular to the longitudinal direction so as to pass through the position.

  Next, concrete is struck into the arranged mold to form a concrete slab 8. When the concrete is hardened, the refractory structural material beam 6 and the concrete slab 8 are more firmly joined via the joining member 7. At this time, the upper part of each refractory structural material beam 6 is covered with the concrete slab 8, so that the load supporting layer 62 of each refractory structural material beam 6 is covered with the burn-off layer 63, the burn-off layer 64, and the concrete slab 8. .

  According to the method for joining the refractory structural material beam 6 and the concrete slab 8 of the present embodiment, the steel plate 7 a embedded in the concrete slab 8 together with the reinforcing bar 9 is a recess provided in the load support layer 62 of the refractory structural material beam 6. Since it only protrudes and fits in 62c, it can be attached easily. Moreover, the recessed part 62c is a direction which leaves | separates from the opposing surface of the inner wooden part 62b in the opposing surface facing the wooden block 21 which makes the inner side wooden part 62b of the wooden block 21 which makes a pair of end plate part 62a among the adjacent wooden blocks 21 It is formed to be recessed. For this reason, since the recessed part 62c can be formed by processing the side surface of the wood block 21, it can be processed with high precision, and the steel plate 7a fitted into the recessed part 62c formed with high precision is high. It is fixed to the refractory structural beam 6 by strength. For this reason, it is possible to join the refractory structural material beam 6 and the concrete slab 8 more firmly.

  In the said embodiment, although the example which made the joining member 7 the steel rod 7b which penetrates the steel plate 7a and the through-hole 7d formed in the steel plate 7a was demonstrated, it does not restrict to this. For example, as shown in FIG. 6, a form in which a stud 7e or the like is provided in advance on one surface of the steel plate 7a by welding or the like may be used.

  In the said embodiment, although the example which fixes the steel bar 7b to the steel plate 7a with the number wire was demonstrated, not only this but a male screw is formed in the outer peripheral surface of the steel bar 7b, for example, as shown in FIG. The steel rod 7b may be fixed to the steel plate 7a by threading the nuts 7f from both ends of the steel rod 7b after passing through the steel plate 7a. Further, a female screw may be formed on the inner periphery of the through hole 7d of the steel plate 7a, and the steel rod 7b on which the male screw is formed may be directly screwed.

  In the said embodiment, although the example which provided the recessed part 62c for arrange | positioning the steel plate 7a in each of a pair of end plate part 62a was demonstrated, it provided in at least any one of the facing end plate part and an inner side wooden part. I do not mind.

  Moreover, in the said embodiment, the load support layer 62 of the refractory structural material beam 6 consists of a pair of end plate part 62a and the inner side wooden part 62b, and provided the recessed part 62c in a pair of end plate part 62a, respectively, and the inner side wooden part Although the example which has arrange | positioned the steel plate 7a on both sides of 62b was demonstrated, it does not restrict to this. For example, as shown in FIG. 8, a single steel plate 7 a fitted in a recess provided in one of two adjacent wood blocks 21 forming a load support layer 62 is a longitudinal direction of the refractory structural material beam 6. It may be configured to be provided with an appropriate interval.

  The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Fireproof structure material 2 Load support layer 3 Burn-out stop layer 4 Burn-off layer 5 Screw (spelling material)
6 Fire-resistant structural beam 7 Joint member 7a Steel plate 7b Steel rod (bar-shaped member)
7c Protruding part 7d Through hole 7e Stud (bar-shaped member)
7f Nut 8 Concrete slab 8a Bottom surface 9 Reinforcement 21 Wood block (wood board)
21a End plate portion 21b Inner wood portion 62 Load support layer 62a End plate portion 62b Inner wood portion 62c Recess 63 Burn-off layer 64 Burn-off layer

Claims (5)

A plurality of wood boards are stacked and integrated by a binding material, and one of the adjacent wood boards is recessed in a direction facing away from the other facing surface and opened upward. A load bearing layer having a recess,
A flame stop layer disposed across both side surfaces and the lower surface of the load support layer; and
A burnt layer made of a wood material disposed over both sides and the lower surface of the flame stop layer,
A refractory structural beam comprising a refractory structural material with
A joining member having a steel plate having a protruding portion that is fitted in the concave portion and protrudes upward, and a steel rod-like member that is provided in the protruding portion of the steel plate and protrudes in a direction intersecting the surface of the steel plate; ,
A concrete slab in which the protrusion and the rod-shaped member are embedded,
The joint structure of the refractory structural material beam and the concrete slab, wherein upper surfaces of the load supporting layer, the flame stop layer and the burn-off layer are covered with the concrete slab. A fire-resistant structural material beam according to claim 1 and a joint structure of a concrete slab,
The load support layer has a pair of end plate portions made of the wood plate material facing each other, and an inner wood portion made of the wood plate material provided between the pair of end plate portions,
The said recessed part is provided in one side of the said adjacent end-plate part and the said inner side wood part at the both sides of the said inner side wood part, The joining structure of the refractory structure material beam and concrete slab characterized by the above-mentioned. A joint structure of the refractory structural beam according to claim 1 or claim 2 and a concrete slab,
The rod-shaped member is a stud provided on the steel plate, and a joining structure of a refractory structural material beam and a concrete slab. A joint structure of the refractory structural beam according to claim 1 or claim 2 and a concrete slab,
The steel plate has a through hole in the protruding portion,
The rod-shaped member is a steel bar that is penetrated through the through-hole and locked to the steel plate by a locking member, and a joining structure of a refractory structural material beam and a concrete slab. One of the two wooden boards facing each other and having a plurality of laminated wooden boards, the opposite face facing the other is recessed in the direction away from the other facing face, and the upper part is opened Forming a recess, forming a load support layer for supporting a load by integrating the plurality of wood boards and laminating the binding material;
Forming a flame stop layer over both side surfaces and the lower surface of the load supporting layer;
A refractory structural beam forming step for forming a refractory structural beam by forming a burn-off layer over both sides and the lower surface of the flame stop layer; and
A joining member mounting step for fitting a joining member having a steel bar and a steel rod-like member projecting in a direction intersecting with the surface of the steel sheet into the recess of the fireproof structural material beam; and
A slab formation step of embedding concrete by burying the reinforcing bar and the joining member projecting on the refractory structural material beam;
A method of joining a refractory structural beam and a concrete slab characterized by comprising: