桥梁实用新型减隔震支座的基本力学性能

Mechanical properties of a practical new isolation bearing for bridges

桥梁减隔震设计主要以减隔震装置的变形来耗散地震能量,为了同时满足桥梁在正常使用阶段的位移和地震作用下的耗能要求,基于摩擦摆支座和铅芯橡胶支座的组合,本文设计了一种实用新型的减隔震支座,通过内嵌式将"滑移隔震"转换装置的上下两个部分连接起来。首先描述了该支座的具体构造和工作原理,并对比验证了该支座的力学特性。最后通过一系列的剪切变形相关性试验(包括不同剪切位移、不同竖向压应力和不同滑移量),总结了该支座的剪切变形性能曲线,结果表明,该桥梁减隔震支座可以同时满足位移变形要求和耗能减震要求,为后续桥梁减隔震优化设计及其工程应用提供了重要的参考。

The design of isolated bridge bears are dissipated the seismic energy by the deformation of the seismic isolation device.In order to meet the displacement requirement of bridges under operation and dissipation requirement of bridges under earthquake at the same time,a practical new isolated bridge bearing was designed in this paper based on the combination of lead-rubber bearings and friction pendulum bearings.The bearing was connected by two parts through embedded in slip-isolation transfer device.Firstly,the configuration of the bearing in detail and its operating principle was illustrated.The mechanical characteristics of the bearing was then validated.Finally,a series of the relative shear performance tests including various shear displacements,various vertical compressed stress and various slippage,were conducted to obtain the curve of shear deformation performance.Therefore,the isolated bridge bearing could simultaneously satisfy the requirements of displacement and dissipation,which could provide an important reference for the further optimal design and engineering application of isolated bridge bearings.