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对支座隔震桥梁输入了多条具有相同反应谱的地震波，通过非线性时程分析，研究了隔震桥梁的地震反应特点，发现隔震桥梁地震反应的离散性很大，其最大响应对地震动的全过程十分敏感。分析了隔震支座延性率与隔震效果之间的关系，发现对某一条地震波，隔震支座延性率有一个最佳范围，在此范围内，支座位移增加较少，而剪力减小很多。对隔震支座的设计参数进行了研究，得到了其合理的取值范围和选择原则。
A large number of seismic waves with the same response spectrum are input to the bearing isolated bridge. According to the nonlinear time-history analysis, the seismic response characteristics of the isolated bridge are studied. It is found that the seismic response of the isolated bridge is very discrete and the maximum response The whole process of earthquake is very sensitive. The relationship between the isolation rate and the isolation effect is analyzed. It is found that there is an optimum range of the ductility of the isolated bearings for a given seismic wave. Within this range, the displacement of the support increases less and the shear force Reduce a lot. The design parameters of isolation bearings are studied, and the reasonable range of values and selection principles are obtained.