JPH03183839A - Seismic isolation and damping devices for structures - Google Patents

Abstract

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

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a seismic isolation/damping device for a structure.

(Conventional technology) A reinforced concrete core wall (a) is constructed using the slip form construction method, etc., and this is followed by an exceptional pillar (b).
The building construction method involves constructing beams (C), pouring concrete for the floor (d), and completing finishing work.
It is widely practiced in the United States and other countries. (Refer to No. 7 and No. 8) When this construction method is actually implemented in Japan, the core wall and the beam will be connected by a straight joint to create a seismic isolation structure.
It is possible to make earthquake-resistant design easier.

Figure 9 shows a seismic isolation structure for this type of structure that can be considered using conventional technology. (e) is attached.

On the other hand, a sliding plate (i) made of a stainless steel plate or the like is attached on a bracket protruding from the core wall (a).

Also, in order to prevent the displacement of one edge between the beam (d) and the bracket (b) from becoming excessive,
A ring-shaped stopper 0) surrounding the entire circumference of the '11 slide bearing (e) is provided. The stopper (j) is a steel angle with a rubber piece (g) attached to the west side, with the stopper (ffi) being the floor and the stopper (e) being the ceiling.

(Problems to be Solved by the Invention) In the conventional structure, "ζ" is a structure in which the horizontal force acting on the beam (d) is small and no internal burr occurs, and the seismic isolation effect is exerted by the elastic deformation of the support rubber (chain). .

As the horizontal force increases, 'C' also slips, so the horizontal force becomes F? The force is not greater than the friction force, and the seismic isolation effect is exhibited.

However, if the deflection becomes excessive, the design becomes difficult, so the elastic sliding bearing (e) collides with the stopper 0) after a certain amount of displacement to suppress the displacement. When the bullet L helical bearing (e) begins to collide with the stopper 0), the comb is deformed to the point where the kinetic energy of the beam is replaced by the strain energy of the stopper rubber (2), and the displacement is stopped. It is composed of

In the above-mentioned seismic isolation device, ζ has a free slip bearing around the elastic sliding bearing (e), and a stopper rubber (O) is installed on the outside of the elastic sliding bearing (e), so the entire device becomes large and the bracket (O
It is necessary to take up a fairly large area, and it takes time and effort to individually install the skid plate (1) and the stopper (0) on the same bracket (G), making it difficult to ensure mounting accuracy.

In addition, if laminated rubber is used for the support rubber (chain), it will not adapt to the rotation of the beam end due to the deflection of the beam (d), and there is a risk that the adhesion between the sliding surfaces will deteriorate.

Furthermore, when the elastic heel bearing (e) collides with the stopper rubber (k), the kinetic energy of the beam (d) is transferred to the stopper rubber (2).
), the rubber is considerably distorted and a large reaction force is generated on the stopper.

Each part of No. 3, No. 3, and No. 5 is designed to withstand this large reaction force, but as described above, the entire device becomes quite large, which is impractical.

The present invention has been proposed in view of the above-mentioned problems of the prior art.The purpose of the present invention is to have a compact structure in which the device is unitized, easy to design, and effective seismic isolation and control. The object of the present invention is to provide a seismic isolation/damping device for a structure that exhibits a vibration effect.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the seismic isolation/damping device for a structure according to the present invention provides a seismic isolation/vibration damping device for a structure that has a structure between a rigid 44 member directly fixed to the ground and a bridging member of the structure. , an upper support unit in which stopper rubber is concentrically attached to the outer peripheral surface of the rigid sliding support;
A lower support unit in which a stopper ring is provided concentrically with an interval from the stopper rubber on a one-sided plate installed opposite to the unit, and between one of the upper and lower units and the member. Seismic isolation system consisting of interposed bearing rubber
It has a ``ζ'' structure with a vibration damping unit interposed.

(Function) According to the present invention, as described above, there is an upper support unit in which a stopper rubber is concentrically attached to the outer peripheral surface of a rigid spring support, and a stopper ring is attached concentrically with the stopper rubber with a space therebetween. The erected lower support unit is connected to a rigid member directly fixed to the ground and a bridging member of a horizontal structure that vertically faces the same member, with support rubber interposed between the upper and lower members. As long as the horizontal force acting on the bridging member is small, no slippage occurs between the upper and lower support units, and a seismic isolation effect is exerted by the elastic change of the support rubber.

In addition, when the end of the bridging member rotates, the supporting rubber elastically deforms and the supporting rubber and the end of the member fit together, so that the degree of adhesion of the sliding surface is good.

When the horizontal force further increases, a shear is generated between the rigid helical support of the upper bearing unit and the sliding plate of the lower bearing unit, thereby exerting a seismic isolation effect.

However, when the sliding displacement is not free and attempts to exceed the periphery, the stopper rubber of the rigid single-beam support of the upper support collides with the stopper ring erected on the sliding plate of the lower support unit. Displacement is suppressed.

At this time, the stopper rubber collides with the stopper ring.
When the ζ reaction force increases, shearing deformation also occurs in the support rubber, and therefore the kinetic energy of the bridging member side is converted into strain energy not only in the stopper rubber but also in the support rubber, and as a result, Within the range where the distortion and reaction force of the stopper rubber are small, displacement can be suppressed and seismic isolation and vibration damping effects can be achieved.

(Example) The present invention will be explained below with reference to the illustrated embodiments.

In the embodiment shown in FIG. 1 and FIG.
2) is a beam that constitutes the structural member of the (R dyed product), and the same beam (
A rigid sliding bearing (4) is attached to the lower end of the housing 2) via a bearing rubber (3).

The synchronous bell bearing (4) is made of steel, has a fluororesin support plate (5) adhered to its lower end, and has a ring-shaped stopper rubber (6) concentrically attached to its outer periphery. Said support plate (5)
The upper support unit is composed of a rigid helical support (4), an outer circumferential stopper rubber (6), and a support rubber (3), which are attached to the tip.

On the other hand, a bracket (7) that faces the end of the beam (2) is protruded from the core wall (13), and a stainless steel plate (8) is layered on the upper surface of the bracket (7). A lower support unit (10) is attached to the lower support unit (10) and has a stopper ring (9) protruding concentrically at a distance from the stopper rubber (6).

In the figure, (11) is the reinforcing lip, (12) is the floor, and (13) is the ceiling.

The illustrated embodiment is configured as described above, and while the horizontal force acting on the beam (2) is small, the rigid sliding bearing (4)
A gap occurs between the support plate (5) and the sliding plate (8) on the lower support unit (10).
The seismic isolation effect is exerted by the extra-bullet deformation of the Also, the beam (2
) With respect to the rotation of the end, C is i! depending on the deformation of the support rubber (3). Since it is dyed with IIg, the adhesion of the entire surface is good.

Therefore, when the horizontal force acting on the shaft (2) increases, the j-beri plate (8), the FIJA-4 periphery support (4), and the base plate (5)
), the C1 seismic isolation effect is exhibited.

When the sliding displacement attempts to exceed the zero mountain sliding allowance l, the stopper rubber (6) on the outer periphery of the rigid sliding bearing (4) collides with the stopper ring (9) on the lower bearing unit (10). Displacement is stopped.

At this time, the stopper rubber (6) is attached to the stopper ring (9).
When the reaction force increases, shearing deformation also occurs in the support rubber (3).

Therefore, the displacement of the kinetic energy retained by the beam (2) can be stopped within a range where the distortion and reaction force of the stopper rubber (6) are small.

In this way, according to the embodiment, the core wall (1) and the beam (2)
The shape of the support interposed between the end portions becomes compact, and the bracket (7) protruding from the core wall (1) can also be made relatively small. In addition, since the upper and lower supports are unitized, installation is easy, and the elastic deformation of the support rubber (3) in response to the rotation of the end of the beam (2) when a horizontal force is applied improves the degree of tightness of the mounting surfaces. get well. Furthermore, due to the ta force between the stopper rubber (6) and the support rubber (3), the stopper rubber (6) is pressed against the stopper ring (9).
The displacement after colliding with is small, the reaction force is also small,
The bearing is downsized.

FIG. 3 shows another embodiment of the present invention, in which the central part of the sliding plate (8) is composed of a sliding plate (8a) with a small friction coefficient, and the peripheral part is a sliding plate (8a) with a large friction coefficient. 8b), when the sliding displacement increases, the frictional resistance increases and it becomes difficult to slip.

l in Kozuberi board (8)? ! The friction coefficient can be changed not only in two stages, but also in several stages from the center to the periphery, and the friction coefficient can be gradually increased.

In the figure, parts equivalent to those in the above embodiment are designated by the same reference numerals.

4 and 5 show still another embodiment of the present invention, in which a support rubber (3) is interposed between the bracket (7) and the lower support unit (10).

In the figure, parts equivalent to those of the above embodiments are given the same reference numerals.

FIG. 6 shows an embodiment in which the seismic isolation/vibration damping device of the present invention is installed between the foundation (14) as the rigid member and the column 1al (15) as the frame member. ) consists of a steel rigid sliding bearing (4) with a fluororesin support plate (5) attached to the tip, an outer stopper rubber (6) of the same bearing (4), and a bearing rubber (3). The upper bearing unit is installed, and a stainless steel sliding plate (8) facing the rigid sliding bearing (4) is layered on the upper surface of the foundation (14), with a gap between the eye and the stopper rubber (6). A lower support unit 1. (10) is mounted with a stopper ring (9) concentrically arranged at -1'L.

In the figure (11) is a reinforcing rib.

Note that the support rubber (3) "C" uses general rubber or laminated rubber.

In addition, between the stopper rubber (6) and the stopper ring (9), there is a 0-pitch burr i, but depending on the case, the stopper rubber (6) does not take the burr burr i, and when slipping occurs, the stopper rubber (6) It is also possible to have a structure in which the effect starts to take effect.

According to the seismic isolation/damping device, as in each of the above embodiments,
Conventionally, this type of device Beams of structures that were essential in (16)
There is no need for a horizontal reaction force mechanism made of laminated rubber or the like interposed between the underground beam (17) and the underground beam (17).

In addition, when the stopper is activated, the kinetic energy C possessed by the structure can be absorbed by the strain energy of the stopper rubber (6) and the support rubber (3), so the reaction force is small and the deformation of the stopper rubber (6) is relatively small.゛ζ change can be stopped.

``The 4th one (18) is the pillar, and the (19) is the floor.

According to the above embodiment, since the edge displacement between the column JIN (15) and the foundation (14) is restrained, the clearance for deformation and the flexibility of the piping of the structure are small. , the design becomes easier.

Further, since the residual deformation is kept small, it is not necessary to carry out work to return to the old position after completion of ground C.

Furthermore, since the above-mentioned horizontal reaction force mechanism is omitted, it is economical, and since the apparatus is unitized, it does not take much time to install and it is easy to ensure accuracy.

(Effects of the Invention) According to the present invention, as described above, the bridging member of the structure,
A seismic isolation/vibration damping device for a structure installed between the rigid F/L member directly fixed to the ground is installed with a stopper rubber concentrically on the outer circumferential surface of the rigid sliding bearing. a support unit, a lower support unit in which a stopper ring is installed concentrically with the stopper rubber on a one-way plate installed opposite to the unit; and one of the upper and lower units and the lower support unit. The shape of the bearing is compact due to the structure of the bearing rubber interposed between the member and the bearing.
The mounting area for the support in the member is small, and since the branch is unitized, installation is easy.

In response to the rotation of the end of the bridge member that occurs when a horizontal force is applied to the structure, the sliding surface of the support is distorted due to the deformation of the support rubber! ! 1lll stain, good adhesion to the sliding surface.

Historically, due to the angle between the stopper rubber and the support rubber, the displacement after the stopper is activated is small, the reaction force is also small, and the support can be made smaller.

[Brief explanation of drawings]

The first figure is a longitudinal cross-sectional view showing one embodiment of the seismic isolation/damping device for a structure according to the present invention, the second figure is a cross-sectional plan view thereof, and the third figure is a longitudinal cross-sectional view showing another embodiment of the present invention. 4 is a longitudinal sectional view showing another embodiment of the present invention, and FIG. 5 is a transverse plan view thereof,
Fig. 6 shows still another actual Ytt example of the present invention - 3 longitudinal cross-sectional view, Fig. 7 is a longitudinal cross-sectional view of a structure to which the seismic isolation/damping device of the present invention is applied, and Fig. 8 is a cross-sectional view of the structure. The plan view and FIG. 9 are longitudinal cross-sectional views of a conventional seismic isolation/damping device applied to the above-mentioned structure. (1)...Core wall, (2)...Beam, (3
)...Rubber bearing, (4)...Rigid sliding bearing,
(5)...Support plate, (6)...Stopper rubber, (7)...Bracket, (8)...Sliding plate, (9)...Stopper ring, (10)... Lower support unit, (14)...Foundation, (15
)...Column base.

Claims (1)

[Claims] Between the rigid member directly fixed to the ground and the structural member of the structure, there is an upper support unit in which stopper rubber is concentrically attached to the outer peripheral surface of the rigid sliding bearing, and a sliding plate opposite to the upper bearing unit. A seismic isolation device comprising a lower support unit in which a stopper ring is installed concentrically with an interval from the stopper rubber, and a support rubber interposed between one of the upper and lower units and the member. - A seismic isolation/vibration damping device for a structure that is characterized by being equipped with a vibration damping unit.