JPH0615779B2 - Concrete-filled steel plate wall in steel concrete structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a concrete-filled steel plate wall in a composite structure of steel frame and concrete.

[Prior Art] Conventionally, a gusset plate is welded to two upper and lower portions of a column steel frame, and tongues for temporary installation of front and back steel plates are connected to and secured to the gusset plate to install the front and back steel plates with a space therebetween. However, there is known a synthetic earthquake-resistant wall in which floor concrete is interposed above and below a synthetic wall filled with concrete in between (see JP-A-60-62354).

[Problems to be solved by the invention]

In the conventional synthetic earthquake-resistant wall, since the upper and lower sides are directly connected to the floor concrete, the compressive strength is maintained by concrete, but in the case of having a steel beam, there is no concrete due to the steel beam between the upper and lower floors. Since it is a vacant space, compression strength cannot be fully exerted, and since the steel plate is not tightly bound over the entire length of the steel column and steel beam, there is nothing to support tensile strength and the tensile strength is weak and the seismic performance is poor. was there.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a gusset plate welded over the entire length of a steel column and a steel beam on the front and back opposite to each other while maintaining a space between the steel plates on the upper and lower floors. Steel frame that is held and fully bonded, and filled with concrete continuously and integrally through the space between the steel plates on the front and back floors of the upper floor and the lower floor, and the space between the steel beams that are separately installed on the front and back sides. It is a measure for concrete-filled steel plate walls in concrete structures.

〔Example〕

 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 frame column 1 such as a steel pipe column, and the steel beam 2 is made of grooved steels 4 and 4 on the front and back sides, and their webs 5 are opposed to each other by a separator / bolt 6 to hold a gap. The end plates 7 are attached to the ends of the steel beam 2 and the steel beam 2 is joined to the steel column 1 with the long fastening bolts 8 so that the total length of the steel column 1 and the steel beam 2 is increased. On the gusset plate 9 welded over, steel plates 10, 10 on the front and back sides are entirely bonded by bolts 12 in a state where a space d is maintained by bolts 11 which also serve as separators. Concrete 13 is continuously filled into the space d between the steel plates 10 through the space D of the steel beam 2 configured as described above. The separator / bolts 11 are arranged at a pitch that prevents expansion of the filled concrete 13 due to cracking and protrusion of the concrete 13 when it is placed.

If there is no lower floor, U-shaped steel 4'with ribs can be used.

As shown in FIG. 2, the separator / bolt 11 is a steel plate 1
A space d between 0 and 10 is secured by a washer 14, and is fixed to the outside of the steel plate 10 by a nut 16 via a washer 15. in this case,
As shown in FIG. 3, a conical trapezoidal metal 18 (see FIG. 4) having a hole 17 through which the separator / bolt 11 passes is welded inside the steel plate 10 and the washer 14 is applied to the inside of the conical trapezoidal metal 18. Secure a space d between the steel plates 10 and 10
Place the washer 15 on the outside of the
The bolts and nuts may not be projected on the surface of the.

By doing so, the interior material can be suitably attached to the surface of the steel plate 10.

〔The invention's effect〕

Since the present invention consists of the above means, there is no need to assemble or disassemble the reinforcement or form in the wall body, and since the steel plates are on both outsides, it is most effective for pulling when a bending force is applied. It resists and exerts sufficient bending resistance, and since the concrete is covered with a steel plate, the concrete does not weather, increasing the amount of reinforcing bars and the thickness of the concrete in case the concrete peels off like reinforced concrete. There is no need to make the floor thicker, and therefore the floor area can be increased, and since the interior is filled with concrete, the heat capacity of the concrete causes the temperature of the outer steel sheet to rise slowly, reducing the rigidity and yield strength of the steel sheet. In addition to having the effect of improving fire resistance, the present invention is particularly directed to the case where steel plates on both outer sides are gussets of steel columns and front and back steel beams even when vibration is applied by an earthquake or the like. Since it is fully bonded to the plate and the tensile strength of the steel plate is interrupted by the concrete floor in the middle of the upper and lower floors as in the past, it is directly transmitted to the entire length of the steel columns and beams. It has sufficient tensile strength over the entire width of the upper and lower floors, and at the same time, unlike the conventional method in which the beam material interrupts the concrete between the upper and lower floors midway between the upper and lower floors. Since concrete is filled through the space between steel plates and between steel beams separated from each other on the front and back sides and the upper floor and the lower floor are continuous with concrete, it has sufficient compressive strength over the upper floor and the lower floor, Due to the synergistic effect of the tensile strength of steel plate and the compression strength of cocrete, it is possible to remarkably improve the deformation capacity over the upper and lower floors and to significantly improve the seismic performance.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a perspective view, FIGS. 2 and 3 are enlarged longitudinal sectional views of part 1, and FIG.
The figure is an enlarged perspective view of a truncated cone-shaped metal object. 1 ... steel column, 2 ... steel beam, 9 ... gusset plate, 10 ... steel plate, 13 ... concrete, d ... spacing, D
……interval

Front page continuation (72) Inventor Katsuya Okada 2-5-14 Minamisuna, Koto-ku, Tokyo Within Takenaka Corporation Technical Research Institute (72) Inventor Yasuo Higashibata 2-5-14 Minamisuna, Koto-ku, Tokyo Stocks Takenaka Corporation Technical Research Institute (56) References Japanese Patent Laid-Open No. 60-62354 (JP, A) Actually developed 56-19601 (JP, U)

Claims (1)

[Claims] 1. Upper and lower floors of a gusset plate (9) welded over the entire length of front and back steel beams (2) and (2) that are opposed to each other while holding a steel column (1) and a space (D). Front and back steel plates
(10), the peripheral edge of (10) is fully bonded with the space (d) maintained, and separated between the upper and lower steel plates (10), (10) space (d) and front and back Steel beams (2), (2)
A concrete-filled steel plate wall in a steel-concrete structure in which concrete (13) is continuously and integrally filled through a space (D).