JPH0427342B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a construction method for continuously filling a steel beam and a steel plate wall with concrete for constructing a steel plate shear wall in a steel-framed concrete structure.

Conventional technology Conventionally, in order to construct beams and walls of a steel-framed reinforced concrete structure, after assembling the beam by attaching H-beams to steel pipe columns, etc., one of the front and back sides of the space surrounded by the columns and beams was filled with concrete. A steel plate with holes is erected, reinforcing reinforcing bars are installed, a mold frame is assembled on the outside of the steel plate, concrete is poured into the mold frame, and after the concrete has hardened, the mold frame is removed and holes for concrete filling are made. Construction methods were being used to close it off.

In addition, as one of the construction methods for conventional steel-framed concrete walls, glass fiber-reinforced concrete L
Shapes are placed back-to-back with intervals maintained to form a beam, and continuous frames made of glass fiber reinforced concrete are stacked up in a formwork shape using partition frames to maintain intervals, and reinforcing bars are installed within the intervals. A method of constructing a wall by applying concrete and pouring concrete is known (see Japanese Utility Model Publication No. 19366/1983).

Problems to be Solved by the Invention In the conventional construction method using steel plates without holes for concrete filling, the beams are H-beams, and the flange blocks the inflow of concrete, and reinforcing reinforcing bars are installed. Because the concrete is poured into every corner of the mold frame, it is difficult to pour concrete into every corner of the mold frame, and it is not possible to pour concrete continuously between the beam and the wall. The problem is that the conventional method uses steel plates with holes for concrete filling, and although the beams are made of H-beam steel, the inflow of concrete is not obstructed, but the connection between the beam and the wall is problematic. Since the beam is separated by the flange of the H-shaped steel of the beam, the beam and wall are not integrated with concrete, and the strength as a shear wall is not sufficient, resulting in poor seismic performance. There was a problem in that it was necessary to seal it with welding, which required a welder and was cumbersome to install. In addition, the method of constructing reinforced concrete walls using L-shaped plates and frames made of glass fiber-reinforced concrete uses glass fiber-reinforced concrete plates instead of conventional formwork, making it easier to construct formwork and shoring. It is a reinforced concrete construction method that saves time and materials, and gives a certain degree of strength to the frame, which corresponds to formwork, and is comparable to H-beam beams in steel-framed concrete structures. However, it cannot be applied to steel-framed concrete structures because it does not have the strength to do so, and it also has the problem that it cannot be expected to have seismic performance as a steel plate shear wall.

Means for Solving the Problems The means of the present invention for solving the above problems is to form a steel beam by arranging the front and back channel steel so that their webs are facing each other with a distance between them and facing each other back to back. , Steel plates for constructing steel plate shear walls in steel-framed concrete structures are constructed by placing front and back steel plates facing each other to maintain a gap between them to form a side wall plate, and then pouring concrete from the upper floor within these gaps. This method consists of continuous concrete filling of beams and steel plate walls.

Embodiment An embodiment of the present invention will be described with reference to the drawings.

In Fig. 1, a steel beam 2 is attached to a steel pipe column 1, and if there is a steel plate wall 3 on the lower floor, the web 5 of the steel beam 2 connects channel steels 4, 4 on the front and back sides with a separator bolt 6. A ribbed U-beam 4' is used when there is no steel plate wall 3 on the lower floor.

An end plate 7 is attached to the end of the steel beam 2 and connected to the steel pipe column 1 with a long tightening bolt 8, and a gusset plate 9 welded to the steel pipe column 1 and the steel beam 2 has front and back steel plates 10, 10. They are fastened together by bolts 12 while maintaining the distance d by separator bolts 11 to form a wall side plate. The separator bolts 11 are arranged at pitches that prevent the concrete 13 from expanding due to cracks when the concrete 13 is filled and from protruding when the concrete 13 is placed.

When concrete 13 is poured from the interval D between the steel beams 2 on the upper floor configured as described above to the interval d between the steel plates 10, 10, the concrete 13 is disturbed by reinforcing bars etc. between the interval D between the steel beams 2. Since there are no reinforcing bars etc. within the interval d, the concrete 1
3 can be easily poured into every corner without leaving any voids. However, it is also conceivable that the structure may be reinforced with prefabricated reinforcing bars, etc., if necessary.

As shown in FIG. 2, the separator bolt 11 is fixed to the outside of the steel plate 10 with a washer 15 and a nut 16, with a washer 14 ensuring a distance d between the steel plates 10, 10. In this case, as shown in FIG. 3, a truncated conical metal fitting 18 having a hole 17 centered inside the steel plate 10 through which the separator bolt 11 passes.
(see Fig. 4), put a washer 14 on the inside of the truncated conical hardware 18 to ensure the distance d between the steel plates 10, 10, put a washer 15 on the outside of the truncated conical hardware 18, and fix it with a nut 16. However, the bolts and nuts may not protrude from the surface of the steel plate 10. By doing so, the interior material can be suitably attached to the steel plate 10.

Effects of the Invention Since this invention consists of the above-mentioned means, channel steels installed opposite each other are used as steel beams, and there is no H-beam steel in the gap between the channel steels and the gap between the steel plates. Because there are no or only a few gaps, these gaps communicate with each other, making it easy to pour concrete continuously from the beam to the wall on the upper floor, so the beam and wall are integrated, and the tensile strength of the steel plate and the concrete can be easily poured. Due to the synergistic effect of the compressive strength of , sufficient strength and seismic performance can be obtained as a seismic wall, and there is no need to close up the holes after filling with concrete, which is the case with conventional steel plates with holes for concrete filling, which saves time and effort. It is easy to construct, and has a height comparable to that of H-shaped steel beams compared to conventional walls using glass fiber-reinforced concrete beams and frames, and has superior seismic performance due to the use of steel plates and concrete. In addition to obtaining a wall, steel plates and channel steel can be used as mold frames, and there is no need for separate mold frame assembly work, so concrete pouring work is easy, and the mold frame can be removed after pouring. Concrete pouring work can be carried out in a short period of time without requiring any construction work, and since the outside is covered with channel steel or steel plates, concrete is prevented from peeling off.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view, FIGS. 2 and 3 are enlarged vertical sectional views of a part, and FIG. 4 is an enlarged perspective view of a truncated conical metal fitting. . 2... Beam, 4... Channel steel, 5... Web, 10
...Steel plate, 13...Concrete, D...Distance,
d... Interval.

Claims (1)

[Claims] 1. Front and back channel steels 4, 4 are arranged back to back with their webs 5 maintaining the distance D to form a steel beam 2, and then the front and back steel plates 10,
A steel beam and a steel plate for constructing a steel plate shear wall in a steel-framed concrete structure in which the steel plates 10 are placed opposite each other at a distance d to form side wall plates, and then concrete 13 is poured from the upper floor within these gaps D and d. Continuous concrete filling method for walls.