中文摘要：

本文针对天津永定新河特大桥南引桥的抗震问题，采用了铅芯隔震橡胶支座隔震技术，依靠隔震支座延长桥梁的自振周期，增加桥梁结构的附加阻尼，从而降低桥梁的地震力，提高桥梁的安全性。在研究中，应用Ansys有限元分析软件对南引桥在隔震、非隔震两种状态下的地震反应进行了时程分析，同时对支座的参数进行了优化，通过对比分析结果，从理论上验证了铅芯隔震橡胶支座的隔震效果。

英文摘要：

Lead rubber isolators （LRB） have generally been used in bridges to enhance the seismic resistance. In the paper, the isolated effect ANSYS study on the Tianjing Yongding new river bridge using LRB is conducted. The equivalent stiffness, damping constant and yield force were optimized. Compared with no-isolated and isolated structure, the best isolation effect of the lead rubber bearing on the total bridge structure associated with the characteristics of the input seismic ground motion is confirmed.