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  赵国辉,刘健新.汶川地震桥梁震害分析及抗震设计启示[J].震灾防御技术,2008,3(4):363-369, DOI:10.11899/zzfy20080405.

汶川地震桥梁震害分析及抗震设计启示
摘要:    汶川地震中公路桥梁破坏严重,且破坏形式在破裂面南、北两端出现显著的差异。本文从震源机制、断层运动方式和桥梁本身特点等角度,分析了产生这一差异的原因。分析结果表明,断层南端由于释放能量巨大,断层逆冲作用显著,结构在竖向和水平向地震力作用下出现强度破坏;而断层北端右旋走滑作用显著,结构在剧烈的地面错动中出现位移型破坏。在此基础上,本文对强震区的桥梁抗震设计提出了相应的改进措施。
作者单位
赵国辉 长安大学公路学院,西安710064 
刘健新 长安大学公路学院,西安710064 
关  键  词:汶川地震  桥梁震害  震源机制  抗震设计
DOI:10.11899/zzfy20080405
基金项目:交通部规范编制项目200402“公路桥梁抗震连梁装置研究”资助
收稿日期:2008-11-05
作者简介:赵国辉,男,生于1978年。讲师,在读博士。主要研究领域:桥梁结构抗震。E-mail:zgh@gl.chd.edu.cn
通讯作者:
Bridge Damage Analysis and Enlightenment in Seismic Design of Wenchuan Earthquake
Abstract:      Highway bridges were severely damaged in Wenchuan earthquake.There was significant difference in damage style from south to north of the fault.From the point view of earthquake source process,movement style of the fault and characteristic of the bridges,we analyzed the possible reasons for such behavior.Our results show that due to the huge energy and faults thrust in south end,the damage style is strength failure.While in the north end,because of the huge right lateral strike slip,the damage style is displacement failure.Finally,improvement measures in seismic design are proposed on the basis of above analysis.
Keywords:  Wenchuan earthquake  Bridge damage  Earthquake source  Seismic design
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