中文摘要：

基于性能的抗震设计是结构抗震设计规范的主要发展方向，其中结构抗震性能水准的定义及其性能指标的选择和量化对结构抗震性能评价至关重要。根据钢筋混凝土高墩的地震反应特性，确定采用曲率延性系数作为性能参数，并给出桥墩在地震作用下曲率延性系数对应各性能水准的量化值。分别以位移延性系数、位移角限值以及曲率延性系数作为性能评价指标，采用增量动力分析法对桥墩进行抗震性能研究，分析结果表明：对于钢筋混凝土高墩而言，曲率延性指标更为合理可靠，尤其是在强震作用下能够更准确反映墩柱的内部破坏情况。

英文摘要：

Performance-based seismic design is now the maj or development direction of structure seismic design.The quantitative of performance parameter and the definition of performance level are important for seismic performance evaluation of structure.Based on the analysis of seismic characteristics of reinforced concrete （RC）high pier,curvature ductility coefficient is selected as the performance parameter for RC high pier subjected to earthquake excitation.And the numerical value of curvature ductility coefficient corresponding to each performance level is given.Seismic performance of one RC high pier is studied using increment dynamic analysis method in which displacement ductility coefficient and drift ratio are employed as performance evaluation parameters to compare with that of curvature ductility coefficient.The results show that curvature ductility coefficient is more reasonable and reliable in evaluating seismic performance of RC high pier,especially subjected to strong earthquake excitation.