JP2920295B2 - PC slab designed to bear horizontal load - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PC slab (precast concrete slab) used for a building of a frame-panel method in which a concrete panel is mounted on a steel frame.

2. Description of the Related Art In a frame panel construction method, a steel frame is first assembled, and then PC panels such as walls and floors are attached to the frame. In this case, in order to secure the in-plane rigidity of a horizontal surface such as a roof or a floor, as shown in FIG.
Attachment of the braces (2), (2)... Is performed in a rectangular space surrounded by (1).

Problems to be Solved by the Invention The above-mentioned braces (2), (2)... Are generally of the tambuckle type, and are attached to the corners of the beams (1) (1). The adjustment of the tan buckle eliminates the initial deflection and secures the in-plane rigidity. However, in recent years, the plan of the building has been diversified, and the arrangement of the braces (2) (2). And, the number of them also increases, and it takes a lot of trouble to install and adjust, and the number of construction steps increases,
This is a factor that lengthens the construction period. Further, in this type of horizontal brace type building, there is also a problem that rigidity based on a rigid floor assumption in design is often insufficient.

The present invention solves the conventional drawbacks and, in recent years, in consideration of the fact that hard PC boards are often used as flooring materials for buildings, the PC boards themselves bear a horizontal shear load. By doing so, it is not necessary to attach the brace as described above.

Means for Solving the Problems And in order to achieve the above object, in the present invention,
Along the both ends of the concrete slab body, joint members are provided integrally as attachment parts to the structural skeleton, and from each end of the joint member, a pair of diagonal directions is formed in the diagonal direction of the slab body. Brace material is provided in the slab body, and these brace materials are fixed to one end of each of the joining members, and the other end is connected to a connection fitting provided at the diagonally intermediate portion. It is characterized by being attached.

Further, it is conceivable to fix the end of the reinforcing main bar provided in the slab body to the joining member and to bend the end in the diagonal direction of the slab body into a brace material.

Also, to transmit the horizontal load between each slab body,
It is conceivable to form a cotter groove in the slab body and integrate the slab bodies with a solidifying agent such as mortar filled in the cotter groove.

According to the configuration of the present invention, the joining member and the brace material serving as attachment portions to the structural skeleton bear the horizontal load integrally with the concrete slab body, and particularly, the shearing force in the axial direction is reduced at both ends of the concrete slab body. It will be dispersed by the long joining member provided along the part.

Embodiment FIG. 1 to FIG. 4 show a first embodiment of the present invention. In the figure, (11) and (11) are a pair of joining plates made of a strip-shaped iron plate, and these joining plates (11)
(11) are arranged in parallel with each other. Then, at both ends of the joining plates (11) and (11), four rectangular reinforcing bars arranged in the diagonal direction in a rectangle having the joining plates (11) and (11) as opposed sides. Brace members (12) (12) are secured at one end by welding or other means. Each brace material (12) (1
2) The other end of the ring-shaped connecting bracket (27) as shown
2 and inside, as shown in FIG. 2, the brace material (12) (12)...
The nut (28)
By loosening or tightening (28), the overall distortion and the like can be adjusted. Joining plate (11) (11)
Bolt holes (14), (14),... For attachment to the beam of the steel frame are formed at both ends of.

FIG. 3 shows the arrangement of the main reinforcement (15). The joining plates (11) and (11) in this figure are the same members as those in FIG. 1, and the surfaces of the joining plates (11) and (11) opposite to the fixing portions of the brace members (12) and (12). , Four longitudinal bars (16), (16) both ends are welded to the respective joining plates (11), (11), and further, each longitudinal bar (16), (16) ...
The two horizontal streaks (17) and (17) are welded across the gap, forming a mesh-shaped main streak (15).

Brace materials (12) (12)…, manufactured as above
Reinforcing body (18) consisting of main reinforcement (15) and connecting bracket (27)
Is integrally buried in the slab body (19) when the concrete slab body (19) as shown in FIGS. 1 and 4 is formed. As shown in FIG. 4, each corner of the slab body (19) is notched in a rectangular shape so that the bolt holes (14) (14) formed at both ends of the joining plate (11) are exposed. ) ... it has been. Also the joining plate (11)
Two cotter grooves (21) and (21) are formed on both end edges of the slab body (19) having no (11). (26)
Are cross-shaped grooves formed on the surface of the slab body (19) at positions corresponding to the brace members (12), (12). The positions of the brace members (12), (12),.

FIG. 5 shows an attached state of the PC slab (22). Both ends of the joining plates (11) and (11) are placed on the upper surface of a beam (23) formed of, for example, an H-shaped groove, and a bolt (24) is inserted through a bolt hole (14) of each joining plate (11). And is fixed to the beam (23). Also, as shown in FIG. 6, the cotter grooves (2) on both end edges of each PC slab (22) (22)
1) (21) match each other, and this cotter groove (21) (21)
Fill with a solidifying agent such as mortar (25). The joints (29) between the PC slabs (22) and (22) are similarly filled with the solidifying agent. When a horizontal load is applied to the PC slab (22) in such a mounted state, the brace material (12) inside the PC slab (22) resists the load, and the load is changed to the brace material (12).
From the mounting part of the joining plate (11) from the beam (23)
To the side. Further, a load is transmitted between the PC slabs (22) and (22) by the solidifying agent filled in the cotter groove (21).

FIGS. 7 and 8 show the brace material (1
2) (12) ... to be supported by the adhesive force, the longitudinal bar (16) of the main bar (15) and the tip of the joining member (11) (1)
While welding to 1), bend it further diagonally,
Brace materials (12) (12) ... Also, the tip of the brace material (12) (12) ...
7) Welded to.

Effect of the Invention As described above, in the present invention, since the joining member and the brace material provided integrally with the slab body resist the horizontal lateral load, such a brace is conventionally attached to the steel frame. There is no need to attach it, and it is sufficient to attach only a PC slab. This has the effect of significantly reducing the number of construction steps and shortening the construction period. Moreover, since the joining members are provided along both ends of the concrete slab body that are parallel to each other, the long joining members can disperse the shearing force in the axial direction. The slab can be provided, and a pair of brace members are arranged from each end of the joining member in a diagonal direction of the slab body, so that the joining member and the brace have an integrated structure connected to each other. These can be assembled in advance in advance, and the PC slab can be manufactured efficiently. Further, since the brace material is provided integrally in the PC slab, the in-plane rigidity is increased as compared with a conventional one in which a tambuckle type brace material is attached to the frame. In addition, since there is no such brace material, there is an advantage that the space behind the ceiling is increased, the utility value of this portion is increased, or the ceiling height can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an arrangement structure of a brace material in this embodiment, FIG. 2 is an enlarged perspective view of a main part showing a connection structure of a distal end portion of the brace material, and FIG. FIG. 4 is a perspective view of the PC slab of the present invention, FIG. 5 is a longitudinal sectional view of a main part showing the mounting state of the PC slab, and FIG. FIG. 7 is a perspective view of a reinforcing member showing a second embodiment of the present invention, FIG. 8 is a perspective view of the same PC slab, and FIG. 9 is a conventional tanbuckle. It is a perspective view of the steel frame set to which the type brace was attached. (11) ... joining member, (12) ... brace material, (15) ... main bar, (19) ... slab body, (21) ... cotter groove, (22) ... PC slab, (25) ...... mortar, (27) ... connecting metal fittings.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 5/02 E04C 2/50

Claims (3)

(57) [Claims] 1. A joining member, which serves as an attachment portion to a structural skeleton, is integrally provided along both ends of a concrete slab body parallel to each other, and a diagonal direction of the slab body from each end of the joining member. A pair of brace members are provided in the slab body, and these brace members have one end fixed to each end of the joining member, and the other end connected to the diagonal intermediate portion. A PC slab that bears a horizontal load, characterized in that it is attached to the connecting fittings provided. 2. A joining member, which serves as an attachment portion to a structural skeleton, is integrally provided along both ends of the concrete slab body parallel to each other, and an end of a reinforcing main reinforcing bar provided in the slab body. A PC slab which is fixed to the joining member and is further bent at an end thereof in a diagonal direction of the slab body so as to bear a horizontal load as a brace material. 3. A cotter groove is formed across slab bodies adjacent to each other, and a horizontal load is transmitted between the slabs through a solidifying agent such as mortar filled in the cotter groove. A PC slab adapted to bear a horizontal load according to claim 1 or claim 2.