JPH10311161A - Damping device in base isolated building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible easily correspond to displacement in every direction even in the case there is a limit to a position for installing a damper in a base isolated building and to enable two dampers to correspond to the displacement in every direction of the base isolated building. SOLUTION: An oil damper 4 is installed on a footing surface 2 below a ground sill 1a of a base isolated building 1 borne on a base isolation device, one end of a wire rope 5 is connected to the ground sill 1a, and the other end is connected to the front end of a rod of the oil damper 4. One end of the wire rope 5 is connected to a joint hardware 6 mounted to the lower part of the ground sill so that it is capable of following the displacement in every direction of the building, the middle part of the wire rope 5 is inserted in a displacement conversion hardware 7 installed on the footing surface of the vibration isolation device and capable of converting the displacement in every direction of the base isolated building into the displacement in one direction and is borne thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping device using an oil damper or the like for controlling a displacement of a base-isolated building supported by a seismic isolation device due to an earthquake or wind.

[0002]

2. Description of the Related Art As shown in FIG. 3, in a seismic isolation building 1, a building is supported by a seismic isolation device 3 such as laminated rubber disposed between a base 1a of the building and a base surface 2, and a damper 4 is provided. Controls the displacement of the base-isolated building 1. In many cases, an oil damper is used for the damper 4, and when the oil damper is installed, the oil damper 4 is conventionally directly attached to the base 1 a of the base-isolated building 1. That is, the base of the cylinder body 4a of the oil damper 4 is connected to a mounting bracket 50 mounted on the base surface 2, and the tip of the piston rod 4b of the oil damper 4 is connected to a connection bracket 51 mounted on the lower surface of the base 1a. I was

[0003]

However, the method of directly mounting the oil damper on the seismic isolation building as described above has a problem that it cannot cope with a case where the arrangement position is limited. In addition, since the oil dampers are directional, a plurality of oil dampers must be installed in accordance with the direction of displacement of the seismic isolation building, which takes up installation space and increases equipment costs.

The present invention has been made in order to solve such a problem, and an object thereof is to easily cope with a case where the installation position of a damper is limited. An object of the present invention is to provide a damping device for a base-isolated building that can respond to displacements in all directions with two dampers.

[0005]

In order to achieve the above object, according to the present invention, a damper (a fluid damper such as an oil damper, a lead damper, etc.) is provided on a foundation surface below a base of a base-isolated building supported by a base-isolation device. Plastic damper, etc.), one end of the wire rope is connected to the base, and the other end of the wire rope is connected to the rod end of the damper. By placing a damper in the empty space between the damper and a predetermined position on the base of the seismic isolation building with a wire rope, it is possible to easily cope with the case where the installation position of the damper is limited. It was made.

Further, one end of the wire rope is connected to a connecting member attached to a lower portion of the base so as to follow the omnidirectional displacement of the seismic isolation building, and an intermediate portion of the wire rope is connected to the base surface of the seismic isolation building. Is installed in the seismic isolation building and inserted into and supported by a displacement conversion member that can convert the omnidirectional displacement of the building into a unidirectional displacement, and a wire rope with one end connected to the connection member is damped through the displacement conversion member. In this way, two dampers can cope with displacements of the seismic isolation building in all directions.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 shows details of the damping device in the seismic isolation building of the present invention, and FIG. 2 shows an entire seismic isolated building in which the damping device of the present invention is installed.

As shown in FIG. 2, the base-isolated building 1 is supported by a base-isolating device 3 such as a laminated rubber in the same manner as in the prior art. In between, the damping device of the present invention is installed. This damping device
Oil damper 4, wire rope 5, connection hardware 6
And a displacement conversion metal fitting 7, a mounting bracket 8, and the like.

As shown in FIG. 1, the oil damper 4 is disposed horizontally on the base surface 2, and the base of the cylinder body 4 a is attached to a mounting bracket 8 fixed to the base surface 2 by an anchor 9. It is attached via a pin 10. One end of the wire rope 5 is connected to the base 1 a of the base-isolated building 1 via the connection hardware 6, passes through the inside of the displacement conversion hardware 7, and the other end is connected to the tip of the piston rod 4 b of the oil damper 4. Connected.

[0010] The connection hardware 6 has a flange 1
a is fixed to the lower surface of a by bolts 11, and an upper locking hole 6a and a lower insertion hole 6b are formed therein. The upper locking hole 6a is a hole for locking a locking member 5a such as a sphere provided at one end of the wire rope 5, and is formed in an inverted conical shape having a bottom corresponding to the locking member 5a. Lower insertion hole 6b
Is a mortar-shaped hole that spreads out downward in a smooth concave shape, through which a wire rope is inserted. Due to the upper locking hole 6a and the lower insertion hole 6b having such a shape, even if the base-isolated building 1 is displaced in all directions, east, west, north and south, the connection portion of the wire rope 5 smoothly follows the connection hardware 6. be able to.

The displacement conversion metal member 7 is disposed immediately below the connection metal member 6 at the time of standby (at the time of stop), is fixed to the base surface 2 by the anchor bolt 12, and has an upper insertion hole 7a and a lower insertion hole 7b formed therein. Have been. The upper insertion hole 7a is a mortar-shaped hole that spreads upward in a smooth concave shape, and the lower insertion hole 7b is a semicircular hole from the lower portion of the upper insertion hole 7a toward the oil damper 4 in a side view. With such an upper insertion hole 7a and a lower insertion hole 7b, even if the seismic isolation building 1 is displaced in all directions of north, south, east and west, the displacement can be smoothly transmitted to the oil damper 4.

In the above-described configuration, the connecting hardware 6, the displacement converting hardware 7, and the oil damper 4 are arranged in an empty space below the base 1a of the base-isolated building 1, respectively. The wire rope 5 is selected, and the wire rope 5 is attached to the connection hardware 6 and the displacement conversion hardware 7. After installation, the connection tool 5 b at the other end of the wire rope 5 is attached to the tip of the piston rod 4 b of the oil damper 4 by a pin or the like. Connect through.

When the base-isolated building 1 is displaced by an earthquake, wind, or the like, the piston rod 4b of the oil damper 4 is pulled out via the wire rope 5, and the damping is performed by viscous damping. Even if the base-isolated building 1 is displaced in all directions, north, south, east, west, the displacement of the base-isolated building 1 can be controlled by the connection hardware 6 and the displacement conversion hardware 7 irrespective of the direction of the oil damper 4.

In the above, the oil damper has been described. However, the present invention is not limited to this, and it goes without saying that the present invention can be applied to other dampers.

[0015]

According to the present invention, the damping device for a base-isolated building is:
With the above configuration, the following effects can be obtained.

(1) Since the base of the base-isolated building and the damper are connected via a wire rope, the damper is installed in an empty space and connected to the base with the wire rope, thereby limiting the installation position of the damper. If there is, it can be easily handled.

(2) Since a wire rope, one end of which is connected to a connecting member attached to the base of the base-isolated building, is passed through the displacement conversion hardware and then connected to the damper, the base is seismically isolated regardless of the direction of the damper. The displacement of the building can be controlled, and two dampers can cope with the displacement of the seismic isolation building in all directions. As a result, it is possible to reduce the installation space and the equipment cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a damping device in a base-isolated building according to the present invention.

FIG. 2 is a front view showing an example of a base-isolated building to which the damping device of the present invention is applied.

FIG. 3 is a front view showing a base-isolated building to which a conventional damping device is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seismic isolation building 1a ... Base 2 ... Foundation surface 3 ... Seismic isolation device 4 ... Damper (oil damper) 4a ... Cylinder main body 4b ... Piston rod 5 ... Wire rope 5a ... Locker 5b ... Connector 6 Connection hardware 6a Upper locking hole 6b Lower insertion hole 7 Displacement conversion metal 7a Upper insertion hole 7b Lower insertion hole 8 Mounting bracket 9 Anchor 10 Pin 11 Bolt 12 …Anchor bolt

Claims (2)

[Claims] 1. A damper is installed on a foundation surface below a base of a base-isolated building supported by a base isolation device, one end of a wire rope is connected to the base, and the other end of the wire rope is connected to a rod end of the damper. A damping device for a base-isolated building, wherein the damping device is connected to a building. 2. The damping device according to claim 1, wherein one end of the wire rope is connected to a connecting member attached to a lower portion of the base so as to be able to follow an omnidirectional displacement of the base-isolated building. Damping in a base-isolated building, characterized in that the middle part is inserted and supported by a displacement conversion member installed on the base surface of the base-isolated building and capable of converting omnidirectional displacement of the base-isolated building into one-way displacement apparatus.