JPS63107659A - Apparatus for adjusting horizontal rigidity of earthquake resistant element - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a horizontal rigidity adjustment device for earthquake-resistant elements such as earthquake-resistant walls and places, which adjusts the horizontal rigidity of earthquake-resistant elements and their restoration saw characteristics. be.

[Problem that the invention seeks to solve]

Reinforced concrete buildings are generally designed as rigid frame structures with shear-resistant walls, but in this case, the horizontal rigidity of the shear-resistant walls is extremely high compared to that of frames made of columns and beams, and the maximum strength point is the point at which the frame yields. This is one of the major technical issues to be considered in seismic design.

Therefore, as a means of solving this problem, several flexible shear walls, including slit shear walls, have been developed, but these mainly rely on the plastic deformation ability of the members to bear the burden of external forces. This improves deformation performance while allowing a certain amount of damage. However, no method has yet been developed that allows shear walls to have a high horizontal deformability in the elastic region where no damage occurs, and also allows the rigidity to be freely adjusted.

This invention was made with the aim of making it possible to freely adjust the horizontal rigidity of existing earthquake-resistant walls, taking into account the actual situation with existing earthquake-resistant walls.This can be achieved by attaching a device that has the ability to deform in the horizontal direction to earthquake-resistant walls, etc. That is.

[Means for solving problems]

In the present invention, by horizontally attaching a plurality of sliding plates facing each other through flexible materials at the upper end, lower end, or intermediate position of an earthquake-resistant element such as an earthquake-resistant wall or place, the horizontal rigidity of the earthquake-resistant element can be increased and Allows free adjustment of load-bearing points, etc.

The horizontal rigidity adjustment device that adjusts the horizontal rigidity of earthquake-resistant elements in this way consists of a plurality of slide plates with this flexible material glued to opposing surfaces, and each slide plate responds to the horizontal force during an earthquake. By sliding in the opposite direction, it exhibits viscoelasticity and increases the deformation capacity of the seismic element.

Furthermore, ribs are provided on each opposing surface of the slide plate to engage with each other during horizontal displacement and function as stoppers, projecting with a clearance in the horizontal direction from each other, thereby increasing the strength of the earthquake-resistant element.

〔Example〕

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

First, the first invention will be explained with reference to FIG.

As shown in FIG. 1, the horizontal rigidity adjusting device WA (hereinafter referred to as adjusting device A) of the present invention includes at least two opposing slide plates 1, 1, and a flexible material 2 bonded to the inside thereof.
It is installed horizontally on the seismic wall B1 or place C to adjust its horizontal rigidity.

FIG. 1 shows an embodiment in which there are two slide plates 1.
．． 1 by vulcanization adhesion or the like, and a clearance 1b is provided in a part as necessary. Of course, the flexible material 2 may be glued over the entire surface of the slide plate 1.1, but the deformation capacity of the shear wall B etc. can be adjusted by appropriately adjusting its length and the size of the clearance 1b. It will be done.

Next, the second invention will be explained according to the drawings from FIG. 2 onwards.

As shown in FIG. 2, in the first invention, the present invention includes ribs on opposing surfaces of the slide plates 1, 1 that engage with each other at the time of maximum horizontal displacement and serve as a par.
, la are provided protrudingly. This mutual reply la, l
A horizontal clearance 1b is ensured between the ribs 1a and 1a, and both ribs 1a and 1a are shaped to fit into each other. In this case also the length of the flexible material 2 and the clearance 1
The deformation capacity of the earthquake-resistant wall B etc. is adjusted by the size of b.

3 to 5 show an embodiment in which this adjustment device A is applied to a shear wall B, particularly a shear wall B made of reinforced concrete.

In this case, on the outside of the slide plates 1, 1, there is a seismic wall B,
Alternatively, stud bolts 3 for fixing to the beam are attached. And the adjustment WUA is the upper end, lower end of the shear wall B,
Alternatively, it can be attached by embedding a stud bolt 3 in the intermediate portion as shown in FIGS. 4 and 5. Figure 4 shows the case where it is attached to the lower end of the earthquake-resistant wall B, and Figure 5 shows the case where it is attached to the middle part. In the former case, the lower slide plate 1 is fixed to the beam.

The adjustment device A is thus installed on a part of the seismic wall B to adjust its deformation ability, that is, its restoring force characteristics.

Figure 6 shows a conventional earthquake-resistant wall and the adjustment device MA of the present invention for comparison.
The restoring force characteristics of shear wall B with . ■ is the clearance of the conventional shear wall, ■ and ■ are the clearance lb of adjustment device A, respectively.
, that is, the characteristics of the shear wall B whose movable range is set to 1.0 am and 1.8 an.

As shown in this figure, due to the clear elastic stiffness and large elastic deformation capacity of the adjusting device A, the elastic deformation area of the structure is dramatically improved, and the maximum proof stress is also increased. It can be seen that the elastic properties also increase the viscous damping of the structure, improving the deformation capacity, maximum strength, and damping characteristics of the shear wall B and the structure, thereby greatly improving the seismic performance of the structure.

Adjustment device A can be installed not only on cast-in-place reinforced concrete shear walls, but also on precast shear walls, steel plate shear walls, places, etc., and can be installed on reinforced concrete and steel reinforced concrete structures.

It is used to improve the seismic performance of various buildings such as steel-framed buildings.

FIG. 7 shows an example of application of the adjusting device A to a place C of a steel frame structure.

〔Effect of the invention〕

In this invention, as described above, the horizontal rigidity of the earthquake-resistant element can be set to an arbitrary value, so that the following effects can be obtained.

In terms of design, it is possible to accurately evaluate the horizontal stiffness of seismic elements, and it is easy to faithfully realize that value.

The concentration of horizontal forces that overburden seismic elements can be avoided.

It is possible to prevent the end of the seismic element from lifting up due to concentration of horizontal force.

Eccentricity due to uneven distribution of walls, etc. can be reduced.

Since the deformability of the shear wall is improved, the occurrence of cracks in the shear wall can be suppressed until the rigid frame member yields.

The bearing capacity of the building as a whole is calculated by calculating the bearing capacity of the rigid frame members (1
00%) can be evaluated as the proof strength (100%) of ten earthquake-resistant elements, and can be expected to have a higher proof strength than conventional ones.

[Brief explanation of the drawing]

Figures 1 and 2 are side views showing production examples of the first and second inventions, respectively, and Figure 3 shows another production example.
is a side view, ■ and ■ are cross-sectional views taken along the line X-X, respectively, and Y-
It is a sectional view taken along the Y line. Figures 4 and 5 show the device of the second invention installed on a seismic wall, where ■ is a front view, ■ is a cross-sectional view, and Figure 6 is a front view.
The figure is a restoring force characteristic diagram of shear walls and structures according to the conventional and the present invention, Fig. 7-I, n. (2) is a front view showing how the present device is attached to the place. A: Horizontal rigidity adjustment device, 1: Slide plate, 1a: Rib, 1b: Clearance,
2... Flexible material, 3... Stud bolt, B
...Shear wall, C...place, D...beam. Figure 1 Figure 2

Claims (2)

[Claims] (1) A plurality of sheets facing each other with flexible materials interposed between them, 1
1. A horizontal rigidity adjustment device for an earthquake-resistant element, comprising a set of slide plates, which are horizontally attached to an earthquake-resistant element to adjust its horizontal rigidity. (2) A set of multiple slide plates that face each other with a flexible material interposed between them and have ribs protruding from each opposing surface that fit into each other with a horizontal clearance. A horizontal rigidity adjustment device for an earthquake-resistant element, characterized in that it is attached horizontally to an earthquake-resistant element to adjust its horizontal rigidity.