JPH06200615A - Three-dimensional vibration-insulating support method - Google Patents

Abstract

PURPOSE:To support installed facilities in a structure vibrating by an earthquake and protect the facilities from the vibration and also efficiently make use of the space. CONSTITUTION:A constitution K having a rigid structure of a singular or multiple layers are supported on a base body B through horizontal vibration- insulating devices 1 attenuating a horizontal vibration. And floor members 5 are supported through vertical vibration-insulating devices 4 attenuating a vertical vibration, in the partitioned spaces 2 of the construction K or respective rooms. Accordingly, installed facilities on the floor members 5 are not affected by the vibration from every direction and the floor members 5 can be laid down without clearances in the partitioned spaces 2.

Description

Detailed Description of the Invention

A. OBJECT OF THE INVENTION (1) Industrial field of application The present invention supports an installation object in a structure that vibrates under a forced vibration force such as an earthquake and protects the installation object from vibration 3
Dimensional seismic isolation support method.

(2) Conventional Technology Vibration is transmitted to an installed object installed in a structure through the structure. When the installed object is one that is extremely sensitive to microvibrations and dislikes the vibrations, such as a super integrated circuit exposure device, an electron microscope, and a single crystal drawing device,
Alternatively, when an important device installed in a structure such as a computer or a computer peripheral device such as a magnetic recording device may fall due to an earthquake motion and cause significant damage to its function, three-dimensional seismic isolation measures should be taken. To be As such a three-dimensional seismic isolation measure, for example, JP-A-59-47.
As shown in Japanese Patent No. 543, a support base is horizontally arranged on a horizontal seismic isolation device, and an equipment installation base is horizontally installed on the support base via a vertical seismic isolation device, or an actual seismic isolation device. As disclosed in Japanese Laid-Open Patent Publication No. 63-98926, a frame is supported on a horizontal seismic isolation device, a vertical seismic isolation device is arranged on the frame, and a seismic isolation floor is installed on the vertical seismic isolation device. Supporting three-dimensional seismic isolation floor structures and the like are known.

(3) Problems to be Solved by the Invention However, according to these known techniques, since the horizontal vibration absorbing element and the vertical vibration absorbing element are integrally incorporated, In the partitioned space of the structure in which the three-dimensional seismic isolation device is installed, a space (dead space) corresponding to a horizontal movement area is indispensable for each space, and a horizontal element and a vertical element are required. Since they are incorporated at the same time, there is a problem that the number of individual devices is increased and the size is increased. The present invention has been made in view of the above circumstances, and in this type of three-dimensional seismic isolation support method that requires countermeasures against microvibration or fall prevention, eliminates the disadvantages of the prior art and eliminates wasted space. It is an object of the present invention to provide a three-dimensional seismic isolation support method that reduces size and facilitates device design.

B. Configuration of Invention (1) Means for Solving Problems The three-dimensional seismic isolation support method of the present invention has the following configuration to achieve the above object. That is, a low / middle-layer rigid structure is supported on a base body through a horizontal seismic isolation device that attenuates horizontal vibrations, and vertical vibrations are damped on the structural floor within the compartment space of the structure. It is characterized by supporting the floor through a vertical seismic isolation device that forms

(2) Action Vibration generated by an earthquake or the like is transmitted through the ground, and the horizontal vibration component is absorbed by the damping action of the horizontal seismic isolation device supporting the structure, and the vibration is transmitted to the structure. Insulate. Also, the vertical vibration component propagated in the structure is absorbed by the damping action of the vertical seismic isolation device that supports the floor body on the structural floor in the compartment space of the structure, and the transmission of the vibration to the floor body is insulated. To do.

(3) Embodiment An embodiment of the three-dimensional seismic isolation support method of the present invention will be described with reference to the drawings. 1 and 2 show an embodiment thereof. In the figure, E is the ground, and K is the target structure of the method of the present invention.

The structure K is installed via a plurality of horizontal seismic isolation devices 1 on a base B which rigidly joins the heads of the foundation piles P driven into the ground E. The structure K has a single-layer or multi-layer (three layers in this embodiment) rigid structure, and the vibration absorption capacity of the structure K itself is low. A floor body 5 is placed and fixed on a floor (which is referred to as a structural floor) 3 that constitutes the body of the vehicle through a plurality of vertical seismic isolation devices 4.

The horizontal seismic isolation device 1 in this embodiment is
A so-called lead plug-filled rubber elastic support (hereinafter "support")
Will be adopted. That is, the support 1 is formed by sandwiching a reinforcing steel plate 12 and a rubber plate 13 between the upper and lower mounting steel plates 10 and 11 in a multi-layered manner for vulcanization adhesion, and the lead body 15 is enclosed in the center of the support 1. In addition to supporting the load of the structure K, it is freely displaced in the horizontal direction to lengthen the input vibration cycle, and the horizontal vibration is attenuated and absorbed by the energy absorption accompanying the deformation of the lead body 15. Is.

Regarding the vertical seismic isolation device 4, a so-called viscous shear resistance type damper (hereinafter referred to as "damper")
Is adopted. That is, in the damper 4, the lower cylindrical body 21 is liquid-tightly erected on the substrate 20 fixed to the structural floor 3, and the highly viscous viscous body 22 is filled in the cylindrical body 21. On the other hand, on the upper plate 24, the upper cylindrical body 26 is spaced from the lower cylindrical body 21 via the support body 25 with a small gap therebetween.
It is installed vertically in 1. Reference numeral 27 is a spacer for maintaining the minute gap and for keeping the floor 5 always horizontal.
A viscous body is interposed in the gap, and the vertical vibration is damped and absorbed by viscous shear resistance generated by relative displacement between the upper and lower cylinders 21 and 26 associated with the vertical movement of the upper cylinder 26.

A coil spring 28 is interposed between the substrate 20 and the support 25 to support the upper load and lengthen the input vibration cycle. The floor 5 is a so-called free access floor composed of support legs 30 and a floor panel 31, and includes an upper plate 24 of the vertical seismic isolation device 4 and a mounting member 32 fixed to the upper plate 24.
It is fixedly supported by the H-shaped steel frame 33 which is fixedly supported by. On the floor 5, there are installed objects such as a super integrated circuit exposure device, an electron microscope, a single crystal drawing device, a computer and its peripheral equipment.

In the structure K thus constructed,
When the ground E is vibrated due to an earthquake, vehicle traffic, etc.,
The vibration propagates through the ground E and reaches the substrate B. Base B
The vibration that has reached the structure is transmitted through the horizontal seismic isolation device 1 to the structure K.
However, since the horizontal vibrations of the substrate B and the structure K are insulated by the horizontal seismic isolation device 1, the horizontal vibrations are absorbed by the seismic isolation device 1 and vibrated in the vertical direction. Only is transmitted to the structure K. That is, the support body 1 of the horizontal seismic isolation device adopts a laminated structure of the rubber 13 and the reinforcing steel plate 12 so as to follow the horizontal movement acting on the base B well, and to keep the enclosed lead body 15 pure. When the horizontal shear deformation is applied, the horizontal vibration of the structure K is quickly attenuated by the energy absorption accompanying this deformation. The good horizontal followability of the support body 1, together with the rigidity of the structure K itself, compensates for the translational property of the structure K placed thereon. That is, as shown in FIG. 3, according to the present support body 1, a pure horizontal shear deformation is performed, and other displacement components such as rocking motion (rolling) are removed.

The vertical vibration transmitted to the structure K is
The vibration wave enters the vertical seismic isolation device 4 through the structural floor 3, and this vibration displacement is a relative displacement between the upper and lower cylindrical bodies 21 and 25 supported by the coil spring 28. Then, the natural period of the vibration wave is made longer by the coil spring 28 interposed between the cylindrical bodies 21 and 25, and the viscous shear resistance of the viscous body 22 quickly absorbs the vibration. As a result, no vibration is transmitted to the installation object placed on the floor 5, the stationary state is maintained, and harmful vibration acceleration does not act.

As can be judged from the above description, the floor body 5 arranged in the compartment space 2 of the structure K does not receive the horizontal force which causes the horizontal displacement, so that the horizontal displacement is absorbed. The means for doing or the extra space that follows it becomes unnecessary.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention. In the previous embodiment, the structure K was supported on the base B via the horizontal seismic isolation device 1. However, the structure is not limited to this, and the horizontal seismic isolation device 1 may be mounted on another structure, such as an existing structure. It is possible to adopt a mode of installing via. As the horizontal seismic isolation device 1, it is possible to employ other bearings such as a combination of a laminated rubber bearing and a damper, a high-damping laminated rubber bearing, or a combination of a sliding bearing and a damper. As the vertical seismic isolation device 4, a combination of a coil spring and a damper, a combination of a rubber shear spring and a damper, a high damping rubber shear spring, or the like can be adopted. Although the vertical seismic isolation device 4 supports the entire floor of the room in the embodiment, it is possible to adopt a mode of supporting a part of the floor of the room.

C. EFFECTS OF THE INVENTION Since the three-dimensional seismic isolation support method of the present invention has the above-described configuration and exerts an action, in a floor of a structure in which an anaerobic installation is installed, the floor is horizontal. It is not necessary to consider the extra space to the space, the space can be effectively used, and a rational seismic isolation structure can be designed. In addition, since the floor only needs to be designed in the vertical direction, it does not become bulky, and especially when the floor is installed in multiple layers, the total height of the structure can be significantly reduced, and the material can be saved. be able to.

[Brief description of drawings]

FIG. 1 is an overall view of an embodiment of a three-dimensional seismic isolation support method of the present invention.

FIG. 2 is a partially enlarged view thereof.

FIG. 3 is a schematic diagram showing the displacement state.

[Explanation of symbols]

 B base (base) K structure 1 horizontal seismic isolation device 2 compartment space 3 structural floor 4 vertical seismic isolation device 5 floor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyoshi Murai 2-5-14 Minamisuna, Koto-ku, Tokyo Inside the Takenaka Corporation Technical Research Institute (72) Inventor Hiroshi Tada 8 Kirihara-cho, Fujisawa-shi, Kanagawa Prefecture OILES Kogyo Co., Ltd. (72) Inventor Ikuo Shimoda 8 Kirihara-cho, Fujisawa-shi, Kanagawa Oiles Kogyo Co., Ltd.

Claims (1)

[Claims] 1. A structure, which substantially retains rigidity, is supported on a base body through a horizontal seismic isolation device for damping horizontal vibrations, and the structure is vertically arranged on a structural floor in a partitioned space of the structure. A three-dimensional seismic isolation support method characterized in that the floor is supported via a vertical seismic isolation device that attenuates the vibration of the floor.