钢筋混凝土桥墩位移延性系数概率分析  

Probability Analysis for Displacement Ductility Factor of RC Bridge Columns

作　　者：曾武华[1] 王逢朝[1] 卓卫东[2] 

机构地区：[1]三明学院建筑工程学院,福建三明365004 [2]福州大学土木工程学院,福建福州350002

出　　处：《工程抗震与加固改造》2016年第5期33-37,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：三明学院科学研究发展基金项目(B201401/G);福建省中青年教师教育科研项目(JA15465)

摘　　要：为了实现桥梁结构基于性能抗震设计多等级性能目标,需要给出桥梁关键构件达到各级性能水平的概率。将钢筋混凝土桥墩抗震性能水平划分为四个等级,并从桥墩物理损伤角度给出各性能水平的控制条件。基于183个矩形和77个圆形桥墩拟静力试验结果,采用统计分析的方法得到各性能水平下位移延性系数统计特征值。采用K-S方法,对位移延性系数概率分布模型进行检验。结果表明,在5%重要性水平下概率分布模型服从对数正态分布。研究结果可用于钢筋混凝土桥墩易损性计算。To implement performance-based seismic design（ PBSD） for bridge structures,it is necessary to assess the probability of reaching multiple performance levels in structural elements. Four seismic performance levels are defined for the capacity of RC bridge columns,along with the explicitly physical damage state of RC bridge columns. On the basis of quasi-static test results of 183 rectangular and 77 circular flexure dominant reinforced concrete piers,the probabilistic characteristics of displacement ductility factor of RC bridge columns are proposed by a statistical method. The probability distributions of displacement ductility factor are examined at different performance levels. It is suggested that they are reasonably lognormally distributed with K-S test at the 5% significance level.The results can be practical applied in the fragility estimates for RC bridge columns.

关 键 词：性能水平 钢筋混凝土桥墩 拟静力试验 概率分析 位移延性系数 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]