JPH0524767Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a shear wall using steel plates.

[The problem that the idea attempts to solve]

It is necessary for seismic walls to have sufficient strength, or appropriate strength and sufficient deformation ability.
In order to exhibit large energy absorption capacity, it is desirable to have appropriate rigidity and large plastic deformation capacity.

By the way, when steel plates are used as earthquake-resistant walls, they usually have a high initial stiffness, so it is necessary to adjust the stiffness by cutting slits, etc., and because the walls are relatively thin, it is necessary to take measures such as welding stiffeners to prevent buckling. Become.

This idea was made based on the actual situation of building earthquake-resistant walls using steel plates, and is an attempt to propose a new earthquake-resistant wall that requires less manufacturing time.

[Means to solve the problem]

In the present invention, by using a steel plate with ribs, the complexity of manufacturing a shear wall is eliminated, and a shear wall with sufficient plastic deformation ability is formed.

On both surfaces of the rectangular steel plate, ribs protruding in a lattice shape that are inclined left and right with respect to the upper and lower sides are formed integrally with the steel plate, and at the same time function as a stiffening material to prevent buckling, and at the same time It serves as a resistance member (brace) against internal horizontal forces.

By having the lattice-shaped ribs bear most of the horizontal force, the thickness of the steel plate can be reduced, and the weight of the earthquake-resistant wall can be reduced.

These ribs also have the effect of increasing the adhesion of the fireproof coating material for the shear wall.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

As shown in Fig. 1, the seismic wall A of this invention consists of a rectangular steel plate 1 having ribs 1a and a steel beam B, B of the upper and lower floors.
It is made by joining.

As shown in the figure, the steel plate 1 has ribs 1a, 1a formed integrally with the steel plate 1 on both surfaces thereof, which protrude in a lattice shape diagonally left and right with respect to the upper and lower sides. It is connected and attached to the steel beams B and B of the floor with bolts 3 and the like via plates 2.

Ribs 1a of steel plate 1 are attached to this shear wall A as necessary.
In addition to this, a stiffener 4 is attached.

The lattice-shaped ribs 1a mainly bear horizontal force in the in-plane direction, and also function to prevent deformation in the out-of-plane direction.

Figure 2 shows a comparison of the load-deformation curves of the shear wall A of the present invention and the conventional brace structure C.As shown here, the shear wall A of the present invention has moderate strength and It can be seen that the material also has sufficient plastic deformation ability without a decrease in yield strength, and possesses a large energy absorption ability.

The rigidity of the shear wall A can be arbitrarily adjusted by changing the spacing and height of the lattice of the ribs 1a, thereby making it possible to make the steel plate 1 thinner.

Figure 3 shows the situation when the fireproof sheathing material 5 or finishing material is sprayed or applied to the seismic wall A. The ribs 1a also have the function of increasing the adhesion effect of the fireproof sheathing material 5, etc. ing.

FIG. 4 compares the adhesion effect of the shear wall A having this rib 1a with that of a normal steel plate S. The horizontal axis shows the adhesion area of the coating material, and the vertical axis shows the adhesion performance.

[Effect of idea]

This idea is as described above, and by using ribbed steel plates integrally protruding from both surfaces of a rectangular steel plate in a lattice shape that is inclined left and right with respect to the upper and lower sides for the earthquake-resistant wall, horizontal deformation capacity is increased. As a result, seismic performance such as energy absorption capacity is improved, and seismic input can be reduced by reducing the weight of the steel plate due to the ribs.

Furthermore, since the adhesion of fireproof coating materials and the like is increased, fireproof performance and safety thereof are improved.

[Brief explanation of drawings]

Figures 1- and 2 are cross-sectional and elevation views showing an embodiment of the present invention, Figure 2 is a load-deformation curve diagram of the present invention, and Figure 3- is a view of fireproof coating applied to a seismic wall. The cross-sectional view and elevation view, respectively, and Figure 4 are graphs of the adhesion performance of the shear walls. A...Shear wall, 1... Steel plate, 1a... Rib, 2
...Plate, 3...Bolt, B...Beam steel frame, 4
... Stiffener, 5... Fireproof covering material.

Claims (1)

[Scope of utility model registration request] This is an earthquake-resistant wall made of rectangular steel plates that are connected to the steel beams between the steel beams on the upper and lower floors.Both surfaces of the steel plates have ribs that protrude in a lattice shape and are integral with the steel plates, slanting left and right with respect to the upper and lower sides. A seismic wall characterized by being formed over the entire surface.