JP2544812B2 - Seismic isolation device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a seismic isolation device for protecting a building structure from daily ground vibrations due to vehicle traffic, earthquakes and other vibrations.

<< Prior Art >> Conventional seismic isolation devices of this type include, for example, Shokai Sho 63-1010.
As disclosed in Japanese Patent Laid-Open No. 5 and the like, there is known one in which a columnar elastic support body made of laminated rubber is provided between a building structure and a foundation.

In particular, in the case of a building structure constructed near a road or a railway, weak ground vibration in the vertical direction is routinely generated due to vehicle traffic, etc. So that you can improve the absorption performance,
It is considered that the use of elastic bearings with thick laminated rubber will increase.

<< Problems to be Solved by the Invention >> By the way, in the case of increasing the thickness of the laminated rubber to improve the vibration absorbing performance against the vibration in the vertical direction, it can be combined with the thick laminated rubber, that is, the vibration in the vertical direction. However, there is no known vertical damper that can be preferably adopted so far.
It was difficult to realize a seismic isolation device that effectively utilizes thick laminated rubber.

The present invention has been made in view of the above circumstances, and by combining an elastic support made of thick laminated rubber and a suitable vertical damper, it is excellent in vibration isolation and seismic isolation, especially for vertical vibration. It is an object of the present invention to provide a seismic isolation device that is capable of exerting its performance and at the same time exerting an effective vibration damping function on this vertical damper even for horizontal vibration.

<< Means for Solving the Problem >> The present invention provides an elastic bearing body which is supported between the building structure and the foundation, supports the building structure on the foundation, and elastically deforms to buffer the relative movement of the building structure and the foundation. A vertical damper composed of a viscous material and a resistor inserted movably in the vertical direction into the viscous material is provided in parallel with the elastic support, and the viscous material forming the vertical damper is The resistor is housed in a first cylinder that is provided on the foundation side and is open to face the above-mentioned building structure, and the resistor is provided on the side of the building structure and is multiplexed with the lower first cylinder. It is composed of a second cylindrical body that is inserted into the viscous material so as to form a cylindrical body structure, and is arranged between these first and second cylindrical bodies so as to be sandwiched therebetween. A spherical shape that guides these relative movements while being rolled by the movement. The feature is that a slide guide is provided.

In the present invention, the first cylinder and the second cylinder may be arranged in the axial direction of the first cylinder with respect to the viscous material in accordance with horizontal displacement between the building structure and the foundation. In order to move the two cylinders, the two cylinders are tiltably attached to the foundation side and the building structure side, respectively.

Furthermore, the present invention is characterized in that the tiltable attachment is performed by a steel rod having a bendable deformable constriction.

<< Operation >> According to the present invention, the elastic support and the vertical damper are provided in parallel between the building structure and the foundation, and the vertical damper is vertically movably inserted into the viscous material and the inside thereof. Since the viscous material and the resistor move relative to each other during vertical vibration, shearing resistance in the vertical direction is generated between the viscous material and the resistor, thereby exerting an extremely effective seismic isolation action.

In addition, if the vertical damper is composed of cylinders that form a multi-cylinder structure on the building structure side and the foundation side, the contact area between the cylinder as a resistor and the viscous material can be reduced even though the structure is compact. The seismic isolation function can be demonstrated with sufficient security.

Further, a spherical slide guide is provided between the first and second cylinders so as to be sandwiched therebetween, and guides the relative movement of the two cylinders while being rolled by the movement of the two cylinders. This spherical sliding guide that guides the movement of both cylinders for smooth movement of the two cylinders with little influence on the damper performance determined by the contact area between the viscous material and the resistor. And it can be done reliably.

In addition, when the first cylinder and the second cylinder are mounted so as to be tiltable with respect to the foundation and the building structure, respectively, both of them are adjusted according to the horizontal relative displacement of the foundation and the building structure when horizontal vibration occurs. Since the cylinders are tilted coaxially and move relative to each other in the axial direction, shear resistance having a horizontal component can be generated in the viscous material. Therefore, the vertical damper not only prevents damage to itself due to horizontal relative displacement, but also exerts a horizontal seismic isolation function.

Furthermore, the mounting that allows the first and second cylindrical bodies to tilt is
By using a steel rod with a bendable deformable constriction, it is possible to support a rigid structure against vertical vibrations and respond to slight vibrations and traffic vibrations, while during horizontal vibrations Since a bending deformation occurs in, the rotation supporting state can be obtained.

<< Examples >> Examples of the seismic isolation apparatus according to the present invention will be described below with reference to the drawings.

 1 to 3 show the first embodiment.

The present invention basically provides between the building structure 1 and the foundation 2 an elastic bearing body 3 that supports the building structure 1 on the foundation 2 and that elastically deforms to buffer the relative movement of these. , The elastic support 3 and the viscous material 5 in parallel with the viscous material 5.
A vertical damper 4 composed of a resistor 7 inserted movably in the vertical direction is provided therein. Further, the viscous material 5 that constitutes the vertical damper 4 is housed in the first cylindrical body 6 that is provided on the side of the foundation 2 and that is open to face the upper building structure 1, and the resistor 7 is The first cylinder 6 provided on the object 1 side and the lower first cylinder 6 are inserted into the viscous material 5 so as to form a multiple cylinder structure with each other.

In this embodiment, as shown in FIG. 1, an elastic support 3 and a vertical damper 4 are provided in parallel with each other between a building structure 1 and a foundation 2. The elastic bearing member 3 is a columnar member made of laminated rubber and is of a thick type having a relatively large rubber thickness, and its upper and lower ends are fixed to the building structure 1 and the foundation 2 via the seats 3a and 3b. There is.

As shown in FIGS. 2 and 3, the vertical damper 4 includes a lower tubular body 6 which is a first tubular body having an opened upper surface for accommodating the viscous material 5 and an upper opening portion of the lower tubular body 6. Viscous material 5
It is composed of a resistor having an open lower surface inserted therein, that is, an upper cylinder 7 which is a second cylinder. The lower tubular body 6 and the upper tubular body 7 are fixed to the building structure 1 and the foundation 2 via columnar connecting members 6a and 7a, respectively, and between these tubular bodies 6 and 7, relative to each other along the axial direction. A gap of several millimeters is set in the radial direction to allow movement. Further, in the present embodiment, these two cylinders 6 and 7 are formed of two cylinder members 6b and 7b having different diameters to form one cylinder 6,7.
And these two cylindrical members 6b and 7b, respectively.
The tubular bodies 6 and 7 made up of are laminated in the radial direction to form a multiple tubular structure, and the tubular walls of the tubular members 6b and 7b are alternately arranged in the radial direction. Then, between the tubular walls of both tubular bodies 6, 7, for example, between the tubular walls of the tubular members 6b, 7b on the center side, sandwiched between them, in multiple stages along the axial direction of these tubular members 6b, 7b, In addition, the two tubular members 6b and 7b are spaced from each other along the circumferential direction of the tubular wall.
A spherical slide guide 8 made of a ball bearing or the like that guides these relative movements while being rolled by the mutual movements.
Are provided so that the relative movement of both the tubular bodies 6 and 7 along the axial direction can be reliably performed.

Further, as the viscous material 5, for example, viscous fluid such as silicon is applied.

According to the configuration of this embodiment, during vibration in the vertical direction, the laminated rubber forming the elastic support body 3 is elastically deformed, and the lower cylinder forming the vertical damper 4 by the amount of deformation generated between the upper and lower sides of the laminated rubber. The body 6 and the upper tubular body 7 relatively move in the axial direction. Based on this relative movement, the viscous material 5 and the upper cylindrical body 6 move in contact with each other, and shear resistance is generated in the viscous material 5, so that a resistance force (damping force) against vibration in the vertical direction.
Is obtained, and extremely effective seismic isolation is performed. Particularly, by forming the lower cylinder 6 and the upper cylinder 7 as multiple cylinders having different diameters from each other, and further by configuring each cylinder 6 and 7 with a group of a plurality of cylinder members 6b and 7b, The contact area between the wall and the viscous material 5 can be increased, whereby a large shear resistance can be obtained even with a compact structure, and a high seismic isolation function can be exhibited. The size of the vertical damper 4 and the number of cylinder walls of both cylinders 6 and 7 can be arbitrarily set by the building structure 1.

 4 to 6 show the second embodiment.

In this embodiment, basically, the lower tubular body 6 which is the first tubular body and the upper tubular body 7 which is the second tubular body are composed of the viscous material 5 depending on the horizontal displacement between the building structure 1 and the foundation 2. On the other hand, in order to move the upper cylinder 7 in the axial direction of the lower cylinder 6, the upper cylinder 7 is tiltably attached to the foundation 2 side and the building structure 1 side, respectively.

Specifically, the lower end of the lower tubular body 6 and the upper end of the upper tubular body 7 constituting the vertical damper 4 are attached to the foundation 2 and the building structure 1 by a universal joint 9 so as to be rotatable in arbitrary directions. ing. That is, each joint 9 is the fifth
As shown in FIGS. 6 and 6, one of the pins connected to each other in a cross shape so as to be rotatable relative to each other is connected to the support frame 11 formed at the ends of the tubular bodies 6 and 7, and the other pin is It is configured by being connected to a support tool 12 provided on the building structure 1 or the foundation 2.

When horizontal vibration occurs, as shown in FIG. 4, both cylinders 6 and 7 are tilted in the coaxial state, and in this state, both cylinders 6 and 7 are axially opposed to each other. Moving. Therefore, in this case, shear resistance having a horizontal component is generated in the viscous material 5, so that the vertical damper 4 can also exhibit a horizontal seismic isolation function. In addition, the normal building structure 1 is displaced by ± 10 cm in the horizontal direction during a strong earthquake,
Even in such a case, a sufficient damping effect can be obtained. Moreover, the tilting of the two cylinders 6 and 7 also makes it possible to prevent damage to the cylinders themselves.

 FIG. 7 shows a third embodiment.

In this embodiment, the cylindrical bodies 6 and 7 for the vertical damper configuration are
It is supported on the building structure 1 and the foundation 2 by a bendable steel rod 13. The steel rod 13 has, for example, a small diameter constricted portion 13a in a stepped manner at a substantially middle portion thereof,
Both ends are cylinders 6 and 7 and the building structure 1 and foundation 2
Is connected to the support tool 14 of. Other configurations are the same as the first
This is almost the same as the embodiment.

According to such a configuration, a rigid structure is supported for vertical vibration, and it is possible to cope with minute vibration, traffic vibration, and the like. On the other hand, during horizontal vibration, the steel rod 13
Since a bending deformation occurs in, a rotation supporting state similar to that of the second embodiment can be obtained.

<< Effects of the Invention >> In short, according to the present invention, the following excellent effects are exhibited.

(1) An elastic support and a vertical damper are provided in parallel between a building structure and a foundation, and the vertical damper is composed of a viscous material and a resistor inserted inside the viscous material so as to be vertically movable. Therefore, when vibrating in the vertical direction, the shearing force in the vertical direction can be generated between them by the relative movement of the viscous material and the resistor, and thus an extremely effective seismic isolation can be exhibited.

(2) Further, since the vertical damper is composed of the cylinders which are provided on the building structure side and the foundation side and which form a multiple cylinder structure with each other,
Although it has a compact structure, it is possible to secure a sufficient contact area between the viscous material and the cylindrical body as a resistor, and to exert a reliable seismic isolation function.

(3) Further, since it is arranged between the first and second cylinders so as to be sandwiched between them, a spherical slide guide for guiding the relative movement of the two cylinders while being rolled by the mutual movement of the two cylinders is provided. With this spherical sliding guide that guides the movement of both cylinders for the rolling motion, the relative movement of both cylinders is hardly affected by the damper performance determined by the contact area between the viscous material and the resistor. It is possible to move smoothly and reliably.

(4) Since the first cylinder and the second cylinder are attached so as to be tiltable with respect to the foundation and the building structure, respectively, depending on the horizontal relative displacement between the foundation and the building structure when horizontal vibration occurs. Both cylinders tilt relative to each other in the coaxial state and move relative to each other in the axial direction, so that shear resistance having a horizontal component can be generated in the viscous material. Therefore, the vertical damper can not only prevent itself from being damaged by horizontal relative displacement, but also exhibit a horizontal seismic isolation function.

(5) Furthermore, by mounting the first and second cylindrical bodies so that they can be tilted with the steel rod having the bendable deformable constriction, it is possible to provide a rigid structure support against vertical vibration. While it is possible to cope with slight vibrations, traffic vibrations, etc., the steel rod is bent and deformed during horizontal vibration, so that it is possible to obtain a rotation support state.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of a seismic isolation device according to the present invention, FIG. 2 is a side sectional view showing an enlarged main part of FIG. 1, and FIG. 3 is III of FIG. -III line view, FIG. 4 is the second
FIG. 5 is an enlarged view of an essential part of FIG. 4, FIG. 5 is a side view showing a part of FIG. 5, and FIG. 7 is an enlarged sectional view of an essential part of a third embodiment. Is. 1 ... Building structure 2 ... Foundation 3 ... Elastic support 4 ... Vertical damper 5 ... Viscous material 6 ... First cylinder (lower cylinder) 7 ... Resistor (second cylinder) , Upper cylinder) 8 …… Spherical slide guide

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasunori Kashihara 2-3 Kandajimachi, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (56) References JP 63-275825 (JP, A) 61-187860 (JP, U)

Claims (3)

(57) [Claims] 1. An elastic bearing for supporting the building structure on the foundation and elastically deforming to buffer the relative movement between the building structure and the foundation, and the elastic bearing body and A vertical damper composed of a viscous material and a resistor inserted movably in the vertical direction into the viscous material is provided in parallel, and the viscous material forming the vertical damper is provided on the foundation side and above. The resistor is housed in a first cylinder opened to face the building structure, and the resistor is provided on the side of the building structure and forms a multiple cylinder structure with the lower first cylinder. The second cylindrical body is inserted into the viscous material, and is sandwiched between the first and second cylindrical bodies, and is rolled by the mutual movement of the two cylindrical bodies. A spherical slide guide is provided to guide relative movement. Seismic isolation device according to claim. 2. The first cylindrical body and the second cylindrical body are arranged in the axial direction of the first cylindrical body with respect to the viscous material in accordance with a horizontal displacement between the building structure and the foundation. The seismic isolation device according to claim 1, wherein the seismic isolation device is tiltably attached to the foundation side and the building structure side, respectively, for moving the two cylindrical bodies. 3. The seismic isolation device according to claim 2, wherein the tiltable mounting is performed by a steel rod having a bendable deformable neck.