JPH0559842A - Waveform steel plate concrete anti-earthquake wall structure - Google Patents

Abstract

PURPOSE:To prevent fragile breake by filling concrete in a wall body reinforcing material additionally serving as wall body formwork integrated with band-like steel plate vertical partition walls provided in several places between two waveform steel plates, so as to form a wall plate. CONSTITUTION:Two sheets of waveform steel plates 3 are vertically disposed in such a manner that the mutual crest portions and mutual through portions thereof where bus-lines are directed horizontally are opposed to each other at a designated space therebetween. A wall body reinforcing material and wall body framework integrated with band-like steel plate vertical partition walls 5 provided in several places between the steel plates 3 is filled with concrete to form a wall plate. Thus, it is possible to improve a fragile breake preventing effect of an anti-earthquake wall 1 and energy absorbing performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic wall structure. More specifically, the present invention relates to a new earthquake-resistant wall structure having an excellent effect of preventing brittle fracture and a labor-saving effect that does not require reinforcement of the wall and demolding.

[0002]

[Prior art and its problems] With the trend of high-rise buildings and increasing social demands for earthquake countermeasures, as well as earthquake-resistant structures that have been modified variously, There is a strong demand for building structures that are highly earthquake-resistant and have excellent safety and workability.

For example, according to the earthquake surveys conducted so far,
It has been reported that in a reinforced concrete building, the structure with earthquake-resistant walls is superior to the structure with only columns and beams in terms of seismic performance and is less damaged by the earthquake. However, it has been pointed out from the results of experiments on some earthquake-resistant wall structures that shear failure of the wall plates and side columns of the earthquake-resistant walls may cause a sharp decrease in yield strength and lead to brittle fracture. .. Regarding the exfoliation and collapse of concrete, which is a factor of such brittle fracture, the fact is that studies on means for preventing this have not been made so much.

As for the conventional seismic wall consisting of a wall body using a large amount of reinforcing bars, in the case of a wall plate having a large found area, the wall reinforcing bars are arranged and solid concrete is poured. In addition, it took a lot of time to brush off the formwork, and there was a big problem in workability. The present invention has been made in view of such a background, and an object thereof is to provide a new earthquake-resistant wall structure which is excellent in workability as well as an effect of preventing brittle fracture.

[0005]

In order to solve the above-mentioned problems, the present invention is designed so that the vertical peaks and the mutual troughs of which the busbars are oriented horizontally face each other at a predetermined interval. The two corrugated steel plates of the same shape, which are arranged in, are integrated with the vertical partition walls of the strip-shaped steel plates provided in several places between them, and the concrete is filled in the wall reinforcement and wall formwork. Provided is a seismic wall structure characterized by being a wall plate.

In the earthquake-resistant wall structure of the present invention, the side columns thereof may be RC columns, concrete-filled square steel pipe columns or bellows steel pipe columns, or steel columns. The corrugated steel plate used for reinforcement can be what is called a so-called generally corrugated steel plate, and its material, corrugation and thickness, together with the material, thickness and interval of the vertical partition wall of the strip steel plate, It can be appropriately determined in consideration of the required earthquake resistance and the required proof stress at the time of construction.

[0007] When this integrated wall reinforcement / wall form is used for an earthquake resistant wall, <1> the thickness of steel plate, the height of corrugation,
Increasing the spacing between partition walls does not hinder the filling of concrete as in the case of increasing the amount of wall reinforcement, so it is easy to reduce the wall plate thickness and increase the steel material ratio. 2> Corrugated steel plates on both surfaces share the shearing force with the filled concrete plate, and due to the joint resistance action with the vertical bulkhead integrated with this, the horizontal expansion and out-of-plane in-plane of the filled concrete plate <3> The vertical partition wall strongly suppresses vertical expansion and contraction in the plane of the filled concrete plate due to the joint resistance action of the corrugated steel plate attached to both vertical edges. 4> 1, 2 and 3 show that concrete with a thin plate thickness has a pressure field due to cable-stayed cracks when the interlaminar deformation angle of the floor where the earthquake-resistant wall is located is still small during an earthquake. To form , The increase of the restraining force as a reaction force from the reinforcement and formwork cannot be expected due to the yielding of the steel plate, and the shear force is increased until horizontal sliding failure occurs, that is, until the interlayer deformation angle of the floor becomes considerably large. The strain plate absorbs the strain energy while enduring the increase of the steel plate, and after the steel plate yields, the steel plate absorbs the larger strain energy. By acting as a high-performance laminated damper that is effective and shows almost no deterioration phenomenon, the shear strength per unit thickness of the wallboard is greater than that of the conventional type earthquake-resistant wall in which the concrete wallboard is reinforced with reinforcing bars. In addition, the toughness up to shear fracture and the absorption of strain energy both increased dramatically, and the interlaminar deformation angle of the tough wallless ramen portion was tracked until the end. As kill shear wall, it is possible to enhance the earthquake resistance of the walled rigid frame structure.

Further, the integrated wall body reinforcing material / wall body formwork is as follows: 1. It can be installed at the site without much labor by being produced in the factory or grounded and hanging the troughs of the opposite corrugations easily. Water-tightness is good because it is made of steel plate, and since wall reinforcements that tend to be an obstacle during pouring are not placed in the formwork, it is suitable for pouring solid and good quality concrete. 3. Since the formwork doubles as a reinforcing material, the material can be used efficiently, and it also has excellent features such as labor saving because there is no need to remove the formwork.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The seismic wall structure of the present invention will be described below in more detail with reference to the accompanying drawings. FIG. 1 is a partial structural perspective view and a sectional view showing an embodiment of the present invention.
For example, as shown in FIG. 1, in the earthquake-resistant wall structure of the present invention, the side columns of the earthquake-resistant wall (1) are reinforced by the bellows steel pipe (2), and moreover, it becomes a factor of brittle fracture of the earthquake-resistant wall. For the purpose of preventing the concrete from peeling and collapsing out of the plane, the vertical arrangement was made so that the peaks and the troughs of which the busbars were oriented horizontally faced each other at a prescribed interval. Two corrugated steel plates (3) of the same shape are integrated with a vertical partition wall (5) of a strip-shaped steel plate provided in several places between them, and the concrete is filled in the wall body reinforcing material / wall body formwork. As a wall plate, a new earthquake-resistant wall structure with excellent brittle fracture prevention effect and labor-saving effect that does not require bar arrangement and demolding is used.

For example, the wall-reinforcing material / wall form shown in FIG. 1 is provided with slits at opposing valleys of the corrugated steel plates (3) on both sides, and vertical partition walls (5) are crossed therethrough to form an outer surface. The intersection of the two is welded together to integrate the two. The bellows steel pipe (2) shown in FIG. 1 has already been proposed by the inventors of the present invention, and it is possible to enhance the proof strength against breakage by covering the outer peripheral surface of the concrete column with the bellows steel pipe. It is possible.

Of course, the present invention is not limited to the above examples, and various design and construction modes are possible.

[0012]

As described in detail above, according to the present invention, the effect of preventing brittle fracture of the earthquake-resistant wall and the energy absorption performance are extremely excellent. Moreover, the present invention saves labor for the wall arranging work and the formwork work, and the corrugated steel plate as the existing formwork also has the performance as the structural member. Can form a joint resistance mechanism with.

[Brief description of drawings]

FIG. 1 is a perspective view and a sectional view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Seismic wall 2 Bellows steel pipe 3 Corrugated steel plate 4 Filled concrete plate 5 Vertical partition wall

Claims (1)

[Claims] 1. Two corrugated steel sheets of the same shape vertically arranged such that mutual crests whose busbars are oriented horizontally and mutual troughs face each other at a predetermined interval. An earthquake-resistant wall structure characterized by being filled with concrete to form a wall board in a wall body reinforcement and wall formwork that is integrated with vertical partition walls of strip steel plates provided at several locations.