张龙飞, 董斌, 韩晓飞, 史双双, 史琳娜. 汶川地震桥梁震害特征分析及地震易损性研究[J]. 华北地震科学, 2019, 37(1): 12-19,71. DOI: 10.3969/j.issn.1003-1375.2019.01.003
引用本文: 张龙飞, 董斌, 韩晓飞, 史双双, 史琳娜. 汶川地震桥梁震害特征分析及地震易损性研究[J]. 华北地震科学, 2019, 37(1): 12-19,71. DOI: 10.3969/j.issn.1003-1375.2019.01.003
ZHANG Longfei, DONG Bin, HAN Xiaofei, SHI Shuangshuang, SHI Linna. Analysis of Seismic Damage Characteristics and Seismic Vulnerability of Bridges in Wenchuan Earthquake[J]. North China Earthquake Sciences, 2019, 37(1): 12-19,71. DOI: 10.3969/j.issn.1003-1375.2019.01.003
Citation: ZHANG Longfei, DONG Bin, HAN Xiaofei, SHI Shuangshuang, SHI Linna. Analysis of Seismic Damage Characteristics and Seismic Vulnerability of Bridges in Wenchuan Earthquake[J]. North China Earthquake Sciences, 2019, 37(1): 12-19,71. DOI: 10.3969/j.issn.1003-1375.2019.01.003

汶川地震桥梁震害特征分析及地震易损性研究

Analysis of Seismic Damage Characteristics and Seismic Vulnerability of Bridges in Wenchuan Earthquake

  • 摘要: 基于数理统计方法,对汶川地震灾区范围内的铁路和公路系统桥梁震害数据进行了统计分析,得到了2种系统梁式桥梁破坏部位震害分布特征及破坏等级变化特征,结果表明:铁路系统桥梁破坏曲线呈“X”形,公路系统桥梁破坏曲线呈波峰状的“X”形,同等地震作用下,公路系统桥梁震害损失比铁路系统桥梁震害损失大,公路系统桥梁抗震性能比铁路系统桥梁抗震性能差;基于桥梁震害统计得到了不同强度地震作用下2种系统梁式桥梁破坏的易损性矩阵,采用贝塔分布函数拟合得出2种系统梁式桥梁地震易损性曲线及分布函数参数,结果表明:2种系统梁式桥梁在低强度地震作用下均以完好、轻微破坏为主,在高强度地震作用时,铁路桥梁以中等破坏为主,公路桥梁则以严重破坏及毁坏为主。研究成果可为地震灾区震害预测和地震灾害损失评估提供参考依据。

     

    Abstract: Based on the mathematical statistics method, the seismic damage data of railway and highway system bridges in Wenchuan earthquake area are statistically analyzed, and the characteristics of damage distribution and the change of damage grade of two kinds of system beam bridges are obtained. The results show that the failure curve of the railway system is "X", and the failure curve of the highway system bridge is a "X" shape. Under the same earthquake action, the seismic damage of the highway system bridge is larger than that of the railway system bridge, and the seismic performance of the highway system bridge is worse than that of the railway system bridge. Based on the statistics of bridge seismic damage, the vulnerability matrix of two kinds of system girder bridges under different intensity earthquakes is obtained. Based on the fitting of the beta distribution function, the seismic fragility curves and distribution function fitting parameters of two kinds of system girder bridges are obtained. The results show that the two kinds of beam bridges under the low intensity earthquake are all in good condition. In the high intensity earthquake, the railway bridge is mainly medium damage, and the highway bridge is mainly damaged and destroyed. The research results can provide reference for earthquake disaster prediction and earthquake disaster loss assessment in earthquake stricken areas.

     

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