汶川地震公路桥梁易损性研究  

A study on the fragility of highway bridges in the Wenchuan earthquake

作　　者：林庆利[1] 林均岐[1] 刘金龙[1] 

机构地区：[1]中国地震局工程力学研究所,中国地震局地震工程与工程振动重点实验室,哈尔滨150080

出　　处：《振动与冲击》2017年第4期110-118,126,共10页Journal of Vibration and Shock

基　　金：国家科技支撑计划课题(2015BAK17B05);国家自然科学基金项目(51108432)

摘　　要：研究发现汶川地震Ⅵ度区和Ⅶ度区内公路桥梁震害调查数据相对于更高烈度区的调查情况不够全面详实,特别是完好桥梁的数据偏少,因此,基于这些原始调查数据生成的经验易损性曲线就会和实际的地震易损性有偏差。针对这一问题,利用高烈度区域内桥梁调查数量与烈度区分布面积的比例关系对低烈度区域的桥梁调查数量进行了补充。基于补充后的桥梁震害数据,得到了汶川地震公路桥梁的经验易损性曲线,并分析了桥型和桥梁规模对易损性的影响。Through the research on seismic damage of highway bridges in the Wenchuan Earthquake,it is found that the survey data of highway bridges in low intensity regions(Ⅵ degree and Ⅶ degree) is less detailed than that of high intensity regions,especially lacking of records of bridges with no damage. In this way,the empirical fragility curves generated based the original survey damage data are not reliable. To solve this problem,the survey quantity of highway bridges in low intensity regions was approximately supplemented,with the proportion between its counterparts in high intensity regions and the corresponding intensity areas. Based on the complemented seismic damage data,the empirical fragility curves of highway bridges in the Wenchuan Earthquake were developed. Furthermore,the effects of bridge type and bridge size on the vulnerability were analyzed respectively.

关 键 词：汶川地震 公路桥梁 经验易损性曲线 极大似然估计 拟合优度检验 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]