中文摘要：

以汝郴高速公路山店江大桥1号高墩为工程背景，通过对钢筋混凝土截面的弯矩一曲率分析确定高墩的损伤指标，利用midas／civil软件进行非线性时程分析，得到该桥墩的理论易损性曲线，并讨论壁厚和基础约束刚度2个参数对桥墩易损曲线的影响。研究成果可为预测结构的抗震性能、结构的抗震设计、加固和维修提供参考。

英文摘要：

On the background of NO. 1 pier of Shandian River Bridge in Ruchen highway, the damage criteria of the high pier were determined through bending moment - curvature analysis of reinforced concrete section and an- alytical fragility curves of the pier were obtained through non - linear time - history analysis by use of midas/ci＇dl software. The influence of the wall thickness and foundation restraint stiffness on fragility curves of the pier was discussed. The results can provide some references to prediction of structural seismic performance, seismic de- sign, structure reinforcement and maintenance.