Vertical micro-tensile isolation bearing

Abstract

The invention discloses a vertical micro-tensile isolation bearing which comprises a rubber isolation bearing arranged between a bearing top plate and a bearing bottom plate; the bearing top plate isconnected with an upper part isolation layer structure through upper pre-buried bolts; and the bearing bottom plate is anchored on a lower buttress structure through lower pre-buried bolts. The vertical micro-tensile isolation bearing is characterized in that the bearing top plate is arranged below a pre-buried steel plate which is in anchoring connection with the upper part isolation layer structure; the upper pre-buried bolts are provided with pressure springs in a sleeving manner respectively after penetrating through the pre-buried steel plate and the bearing top plate; limiting nuts and the upper pre-buried bolts are fastened to form a vertical micro-tensile device; the bearing top plate is in pressure connection with the pre-buried steel plate through the pre-tightening force of thepressure springs; and the two ends of the pressure springs are provided with gaskets respectively. Compared with the prior art, the vertical micro-tensile isolation bearing has strong anti-overturningability and stable performance, greatly improves the anti-overturning ability of a whole rubber vibration isolation system and better solves the problem of an over-limited tensile stress of a high-rise building isolation bearing.

Description

technical field [0001] The invention relates to the technical field of seismic isolation of construction engineering, in particular to a micro-tensile seismic isolation bearing capable of adapting to vertical deformation. Background technique [0002] The seismic isolation of construction projects is to extend the natural vibration period of the structure and reduce the input of horizontal seismic action, thereby reducing the seismic response of the upper structure and effectively improving the seismic performance of the structure to protect the safety of personnel and equipment inside the building. This technology is especially suitable for use in areas with good site conditions and high seismic intensity. In the existing seismic isolation system, the laminated rubber isolation bearing isolation system is mainly used to isolate the horizontal earthquake action, and has become the mainstream of the isolation system in the world. The use of seismic isolation technology can e...

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Problems solved by technology

[0003] However, the overturning effect of high-rise structures is obvious, the height-width ratio of the structure is large, and the tensile pressure at the edge of the structure is relatively large, and the tensile performance of the laminated rubber isolation bearing is obviously weaker than the compressive performance, so it is easy to cause the overturning moment Tensile damage of the lower rubber bearing, or even destruction

This usually becomes the critical main control parameter for the structural design of the high-rise rubber isolator system, which affects the promotion and application of the laminated rubber isolator system in high-rise buildings, and also limits the development of high-rise building projects in high-intensity earthquake areas

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