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

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (4) : 110-118.

LIN Qingli,LIN Junqi,LIU Jinlong

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Abstract

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.

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Wenchuan Earthquake / highway bridges / empirical fragility curves / maximum likelihood method / goodness of fit test

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LIN Qingli,LIN Junqi,LIU Jinlong. A study on the fragility of highway bridges in the Wenchuan earthquake[J]. Journal of Vibration and Shock, 2017, 36(4): 110-118

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