方形铅芯橡胶支座力学性能试验研究及隔震桥梁地震响应分析

为开发出能更好适用于桥梁隔震的支座,对方形铅芯橡胶支座进行了力学性能试验,并与铅芯橡胶支座力学参数理论公式计算的结果进行了对比,吻合较好,从而为方形铅芯橡胶支座的设计提供依据。在此基础上以某一四跨连续梁桥为例计算其地震响应,分析了方形铅芯橡胶支座的隔震效果。研究表明,方形铅芯橡胶支座性能稳定、力学性能良好、安装方便、隔震效果好,是一种理想的桥梁隔震装置。

Experimental Study of Mechanical Properties of Square Lead Rubber Bearing and Seismic Response Analysis of Isolated Bridge

To develop an ideal bearing for bridge seismic isolation,mechanical properties tests on square lead rubber bearings are conducted,and the experimental data are in agreement with the rubber bearings theoretical formulae analysis results,which can provide references to design square lead rubber bearings.Based on the result,the seismic response of a four-span continuous beam bridge and the seismic isolation of square lead rubber bearings are analyzed.It is found that the square lead rubber bearings are ideal bridge isolated devices with excellent working performance,good isolation effect and convenient for installation.