(同济大学土木工程防灾国家重点实验室，上海 200092)

［摘要］根据以受弯为主的钢筋混凝土梁、柱的地震破坏过程提出了各性能水平和性能界限状态的划分标准，并建立了对应于各性能界限状态的变形计算方法。通过对梁、柱截面的弯矩-曲率分析，分别建立了梁、柱截面受压区高度的计算方法。利用对美国太平洋地震工程研究中心建立的钢筋混凝土柱试验数据库的统计分析和钢筋混凝土受弯构件的塑性铰理论，提出了柱在各性能界限状态时截面压区边缘混凝土的应变限值计算方法。通过混凝土受压应变和钢筋受拉应变的限值得到钢筋混凝土梁、柱的变形限值。研究结果可为钢筋混凝土结构基于位移的抗震设计和抗震性能评价提供依据。

［关键词］基于位移的抗震设计；钢筋混凝土；梁；柱；地震损伤

Performance limit states and deformation limits of RC beams and columns

Jiang Huanjun, Wang Bin, Lü Xilin(State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract:The criterion to classify the performance levels and performance limit states are proposed for flexure-dominant reinforced concrete(RC) beams and columns according to the seismic damage process. The method to estimate the deformation limits corresponding to these limit states is developed. The formulas are derived to estimate the compression zone depth of beam and column section respectively. The strain limit of the extreme compression fiber of column section at individual performance limit state is obtained on the basis of the plastic-hinge method suitable for flexure-critical RC structural members and statistical analysis on the database containing the results of cyclic tests on RC columns assembled at the Pacific Earthquake Engineering Research Center (PEER) in USA. Through the limits applied on concrete compression strain and steel tensile strain, the deformation limits on RC beams and columns are developed. The research results can be utilized for displacement-based seismic design and seismic performance evaluation of RC structures.

Keywords:displacement-based seismic design; reinforced concrete; beam; column; seismic damage

*国家自然科学基金项目(50708081，90815029)；上海市浦江人才计划项目(08PJ1409900)。

作者简介：蒋欢军，博士，副研究员，Email：jhj73@tongji.edu.cn。

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