多点非一致激励下钢筋混凝土梁桥弹塑性抗震可靠度分析  

Elastoplastic seismic reliability analysis of reinforced concrete beam bridge subjected to multi-support non-uniform seismic excitation

作　　者：张振浩[1,2] 隗磊军 杨伟军[1] ZHANG Zhenhao KUI Leijun YANG Weijun(School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha 410076, China Hunan Province Research Center for Safety Control Technology and Equipment of Bridge Engineering （Changsha University of Science ＆ Technology） , Changsha 410076, China)

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410076 [2]桥梁工程安全控制技术与装备湖南省工程技术研究中心(长沙理工大学),湖南长沙410076

出　　处：《世界地震工程》2016年第4期134-139,共6页World Earthquake Engineering

基　　金：国家自然科学基金资助项目(51108044);长沙理工大学桥梁工程安全控制技术与装备湖南省工程技术研究中心开放基金资助项目(12KC03)

摘　　要：建立以计算结构失效概率为目的的抗震动力可靠性分析方法对梁桥抗震分析水平的提高具有重要意义。基于结构动力可靠度理论,以Kanai-Tajimi模型为地震动激励,同时考虑地震波传播过程中时间迟滞所导致结构受到的多点非一致激励以及强震所导致的结构滞变特性(即弹塑性),并考虑桥梁设计基准期内地震发生的随机性,分析得到了梁桥在其设计基准期内不同地震烈度下的抗震可靠度。实例表明,所提分析方法与分析过程是合理可行的,为钢筋混凝土梁桥结构的抗震可靠性分析提供了参考。Establishing seismic dynamic reliability analysis method whose aim is calculating the structural failure probability has important significance for improving the level of beam bridge seismic analysis. In this paper it is assumed that the ground motion excitation obeys Kanai-Tajimi model. Based on structural dynamic reliability theory, seismic reliability during design reference period for different seismic intensities was analysed and calculated, considering multi-support non-uniform excitation caused by time delay during seismic wave spread, structural hysteretic behavior（elastoplasticity） caused by strong earthquake, and randomness of earthquake during bridge design reference period. It is showed from the example that the analysis method and process proposed in this paper is reasonable and feasible, which provide useful reference for seismic reliability analysis of reinforced concrete beam bridge.

关 键 词：钢筋混凝土梁桥 抗震可靠度 多点非一致激励 滞变性 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]