A kind of damping combined building shock-isolation rubber bearing and its manufacturing method

Abstract

A damping combined type building seismic isolation rubber support comprises an outer connection steel plate and a support core body. The support core body comprises a sealing plate, a stiffening steel plate, a high-damping rubber layer and a rubber protective layer which are formed into a whole through heat vulcanization, the high-damping rubber layer is made of ultrahigh-damping rubber, n bar holes are formed in the support core body in the axis direction, high-damping metal bars are arranged in the bar holes, and the high-damping metal bars and the support core body are fused into a whole. The manufacturing method of the seismic isolation rubber support is simple in process. The manufactured high-damping rubber layer has excellent antifatigue performance, deflection resistance and weather ability, and the damping ratio reaches 20 percent. The seismic isolation rubber support combines performance advantages of a high-damping rubber support and a lead core seismic isolation rubber support, remarkable yield force and the equivalent damping ratio are increased greatly, the seismic isolation rubber support is more comprehensive and excellent in horizontal properties, antifatigue performance, deflection resistance and weather ability, seismic mitigation and isolation bearing analysis and using effect of building structures are achieved easily, and the application field is widened. The damping combined type building seismic isolation rubber support is long in service life and stable and safe.

Description

technical field [0001] The invention relates to a bridge engineering component and a manufacturing method, in particular to a damping combined building shock-isolation rubber bearing and a manufacturing method thereof. Background technique [0002] In the world, earthquakes and wind-induced disasters have caused a large number of building structures to be damaged, resulting in more casualties and huge economic losses. Therefore, it is very urgent to carry out effective seismic design protection for engineering structures. It is currently considered to be one of the most ideal anti-seismic design methods. The rubber support with certain damping performance used in engineering structure shock absorption and isolation technology generally improves the effect of shock absorption and isolation by increasing the damping of the support product. [0003] At present, the rubber supports used in building structures mainly include lead-core isolation rubber bearings and high-damping ru...

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Problems solved by technology

[0004] In the field of construction, the rubber shear modulus of seismic isolation rubber bearings is very low, and it is very difficult to increase the damping ratio of the bearing itself to achieve ultra-high damping performance by improving the rubber damping performance; The wind test calculation is generally controlled by the isolation layer (that is, the isolation support). Sometimes the isolation support requires a large yield force. In this way, even if the damping ratio of the support achieves 0.2 level performance, due to the rubber elasticity If the modulus is too small, the yield force of the high damping rubber bearing alone is not enough; for the building lead core isolation rubber bearing, if the equivalent damping ratio needs to be increased, it can be achieved by increasing the diameter of the lead core, but If the diameter of the lead core is too large, the area ratio between the lead core and the rubber body will be too large, which will lead to a decrease in the ultimate shear deformation capacity of the support and a decrease in the overall performance of the support, so that it cannot be used in some important buildings.

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