CN100353012C - Three-dimemsional vibration insulationg system - Google Patents

Abstract

The invention discloses a three-dimensional shock-isolation support. The structure of the vertical shock-isolation support is that a guide is fixed on the horizontal shock-isolation support, a protruding shaft is installed in the guide, and a The damping material is equipped with a cover plate fixed to the guide. The upper end of the protruding shaft protrudes out of the guide, and the lower end of the protruding shaft is in motion with the guide. There is a gap between the lower end surface and the guide. An upper connecting plate is arranged on the disc spring laminate, which is fixed with the protruding shaft, and moves with the outer surface of the guide, leaving a gap between the upper end surface. There are at least two disc spring laminated parts in series, which are sleeved on the outer surface of the guide part and are in dynamic fit with the guide part. The support can simultaneously isolate and inhibit the transmission of horizontal seismic waves and vertical seismic waves to the upper buildings.

Description

Three-dimensional isolation bearing

technical field

The invention relates to a vibration isolation support.

Background technique

Seismic isolation of the building foundation is to set a flexible seismic isolation layer with sufficient reliability between the building and the foundation to control the transmission of seismic waves to the upper structure. Theoretical and experimental research and engineering practice show that base isolation technology is one of the most effective methods for buildings to resist earthquake disasters. At present, the seismic isolation research of the horizontal seismic component has achieved gratifying results in various countries in the world, and has been widely used in engineering practice. However, since the ground motion during an earthquake is a spatial motion, in addition to horizontal seismic waves, vertical seismic waves are equally destructive. Especially for some high-intensity areas and areas near the epicenter, the vertical seismic component is very obvious, reaching more than 2/3 of the horizontal seismic component. However, the foundation seismic isolation bearings successfully developed at home and abroad (mainly laminated rubber isolation bearings) are horizontal seismic isolation bearings, which do not have any effect on vertical seismic waves. So far, there has been no substantive progress in the research of three-dimensional seismic isolation bearings that can simultaneously transmit horizontal seismic waves and vertical seismic waves at home and abroad. Therefore, there is an urgent need to develop a three-dimensional seismic isolation bearing that simultaneously isolates horizontal seismic waves and vertical seismic waves, so as to greatly improve the ability of structures to resist earthquake disasters in all directions.

In addition, mechanical vibration also seriously affects the safety of structures, the health of equipment operators and disturbs the normal life of residents. At present, although there are many vibration isolators, almost all of them are unidirectional vibration isolators, and the bearing capacity is small, and there is a lack of three-dimensional vibration isolators with large bearing capacity.

Contents of the invention

The purpose of the present invention is to overcome the deficiency that the above-mentioned prior art cannot simultaneously isolate and suppress the transmission of horizontal seismic waves and vertical seismic waves to the upper building, and provide a three-dimensional seismic isolation support, which can simultaneously isolate and suppress horizontal seismic waves and vertical seismic waves are transmitted to the upper buildings.

In order to achieve the above object, the technical scheme adopted by the present invention is: alternately stack rubber sheets, steel sheets, and rubber sheets on the lower connecting plate, place a middle connecting plate on the top rubber sheet, fix the guide on the middle connecting plate, and place the guide on the guide. A protruding shaft is installed inside, a damping material is placed between the protruding shaft and the guide piece, a cover plate is installed on the damping material, the cover plate is fixed with the guide piece, the upper end of the protruding shaft protrudes out of the guide piece, and the gap between the lower end and the guide piece There is a gap between the lower end surface and the guide piece, and an upper connecting plate is placed on the disc spring stack, and the upper connecting plate is fixed with the protruding shaft, and moves with the outer surface of the guide piece. There is a gap between the upper end surface of the guide piece, and at least two disc spring stacked pieces are connected in series, which are sleeved on the outer surface of the guide piece and are in dynamic fit with the guide piece.

Fiber cloth can be used instead of the above-mentioned steel sheets.

A film can be placed between the two disk springs.

The advantages of the present invention are:

1. The support has suitable stiffness and damping performance in three directions at the same time. The bearing capacity of a single bearing is large (up to several hundred tons), and the bearing capacity, stiffness and damping are particularly easy to adjust.

2. The support is simple in structure, long in service life, stable in performance, widely used in materials, easy in processing and manufacturing, and therefore low in cost.

3. The bearing is multi-purpose and has significant direct economic and social benefits.

The support can be used for three-dimensional base isolation of engineering structures, can firmly support the upper structure and effectively prevent the building from overturning and rotating, reduce the transfer of earthquake energy to the upper structure, and effectively reduce or even avoid the impact of the earthquake on the engineering structure and people's property. At the same time, it can also be used for vibration isolation of mechanical equipment to reduce the damage of mechanical vibration to the structure, environment and personnel.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a sectional view along line A-A of Fig. 1 .

Fig. 3 is a schematic structural diagram of another embodiment of the present invention.

Detailed ways

In the present invention, the number of the disc springs 8 stacked in series can generally be an even number between 2 and 16. Disc spring 8 laminations can contain 1～6 disc springs 8, and it is best to contain 2～4 disc springs 8, and film 7 can be placed between two disc springs 8.

As shown in Fig. 1 and Fig. 2, the present invention includes a steel sheet 1, a rubber sheet 2, a lower connecting plate 3, a rubber protective layer 4, a middle connecting plate 5, a damping material 6, a film 7, a disc spring 8, and a guide 9 , Steel protection layer 10, upper connecting plate 11, protruding shaft 12, damping material 13, cover plate 14.

Rubber sheets 2, steel sheets 1, and rubber sheets 2 are alternately stacked on the lower connecting plate 3, a middle connecting plate 5 is placed on the top layer of rubber sheet 2, and a damping material 6 is built in the center holes of the lower connecting plate 3 to the middle connecting plate 5, They are in close contact, and there are rubber protection layers 4 on the outer surfaces of the alternately stacked rubber sheets 2 , steel sheets 1 and rubber sheets 2 . Fix guide 9 on middle connecting plate 5, protruding shaft 12 is housed in guide 9, damping material 13 is placed between protruding shaft 12 and guide 9, and damping material 13 is lead or viscous material. A cover plate 14 is mounted on the damping material 13 , and the cover plate 14 is fixed to the guide member 9 . The upper end of the protruding shaft 12 stretches out of the guide piece 9 , and its lower end is in motion fit with the guide piece 9 , and there is a gap between the lower end surface and the guide piece 9 . An upper connecting plate 11 is placed on the disc spring 8 laminates, and the upper connecting plate 11 is fixed with the protruding shaft 12, and moves with the outer surface of the guide 9, leaving a gap between the upper end surface. Disc spring 8 laminations are made of three disc springs 8 and a film 7 sandwiched between two disc springs 8. The film 7 can be a rubber sheet or a sticky elastic sheet, and the film 7 can increase damping and prevent rust. There are four such laminated parts connected in series, which are sleeved on the outer surface of the guide part 9, and are dynamically matched with the guide part 9, and a steel protective layer 10 can be housed on its outside.

The gap between the lower end surface of the above-mentioned protruding shaft 12 and the guide member 9 can be equal to the gap between the upper connecting plate 11 and the upper end surface of the guide member 9, and greater than or equal to the sum of the distances between the disc springs 8 laminations 2h.

The lower connecting plate 3, the rubber sheet 2, the steel sheet 1 and the rubber sheet 2 alternately stacked on the lower connecting plate 3, the middle connecting plate 5, and the damping material 6 form a horizontal shock-isolation bearing, which has relatively soft horizontal stiffness and high The damping, the vertical stiffness is very large, and the horizontal shear deformation mainly occurs during the earthquake, which is used to isolate the horizontal seismic wave. Four series-connected disc springs 8 laminations, film 7, guide 9, upper connecting plate 11, protruding shaft 12, damping material 13 and cover plate 14 constitute a vertical shock-isolation support, which has a suitable vertical Stiffness and damping performance, the horizontal stiffness is very large, almost only the vertical displacement occurs during the earthquake, and it is used to isolate the vertical seismic wave.

When an earthquake occurs, large horizontal and vertical displacements will occur between the upper connecting plate 11 and the lower connecting plate 3 in the three-dimensional isolation bearing, so that the natural vibration period of the horizontal vibration and vertical vibration of the structure is far away from the excellent period of the site , so that the structure vibrates away from the resonance peak. In addition, the damping materials 6 and 13 will also absorb part of the seismic energy to reduce structural vibration. In this way, since most of the seismic energy is consumed and absorbed by the three-dimensional seismic isolation bearing, a small part of the seismic energy is transmitted to the upper structure, so that the structure produces a small vibration and achieves the purpose of seismic isolation.

As shown in FIG. 3 , the difference from FIG. 1 is that the stack of disc springs 8 consists of two disc springs 8 and the film 7 sandwiched therebetween. There are six such stacks connected in series. No damping material 6 is provided in the central hole of the lower connecting plate 3 to the middle connecting plate 5, and the gap between the lower end surface of the protruding shaft 12 and the guide 9 can be greater than or equal to the sum of the distances between the disc springs 8 laminations 3h.

The steel sheet 1 can be replaced by fiber cloth, and the fiber cloth is carbon fiber cloth or aramid fiber cloth. The use of fiber cloth increases the damping of the horizontal shock-isolation support, and the processing is easier and the cost is lower.

Claims (3)

1. three-dimensional shock isolation support, on lower connecting plate, alternately pile up sheet rubber, steel disc, sheet rubber, on the topping rubber sheet, be equipped with middle junction plate, it is characterized in that: go up fixed guide (9) at middle junction plate (5), protruding axle (12) is housed in guide (9), be equipped with damping material (13) between protruding axle (12) and the guide (9), cover plate (14) is housed on damping material (13), cover plate (14) fixes with guide (9), stretch out outside the guide (9) upper end of protruding axle (12), between its lower end and the guide (9) movingly, and leave the gap between lower surface and the guide (9), be equipped with upper junction plate (11) on disk spring (8) composite part, upper junction plate (11) fixes with protruding axle (12), and between the lateral surface of guide (9) movingly, and and leave the gap between the upper surface of guide (9), the series connection number of disk spring (8) composite part is at least two, be enclosed within on guide (9) lateral surface, and between the guide (9) movingly.

2. three-dimensional shock isolation support according to claim 1 is characterized in that: substitute above-mentioned steel disc (1) with cloth.

3. three-dimensional shock isolation support according to claim 1 and 2 is characterized in that: be equipped with film (7) between above-mentioned two disk springs (8).

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