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《Journal of Southwest Jiaotong University》 2019-05
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3D Seismic Vulnerability Analysis of Bridge Structural Components Based on Reliability

SHAN Deshan;GU Xiaoyu;DONG Jun;LI Qiao;School of Civil Engineering,Southwest Jiaotong University;  
In order to evaluate the near-field seismic performance of bridge structures,a three-dimensional(3 D)seismic vulnerability analysis process for bridge components is established. Based on the reliability theory of engineering structures,3 D failure surfaces of the components are used to characterize the damage status of pier columns and bearing components,and the damage state equation containing multiple independent damage indices is regarded as the damage index for the 3 D seismic vulnerability analysis. In light of the existing research on the bending and shearing failure surfaces of piers,damage state equations for piers with bending failure and shear failure and for bearings with relative displacements are built. On this basis,the criteria for 3 D seismic damage of pier columns and bearings are established, and quantitative methods for calculating the damage in different damage states are presented. The final calculation and analysis of the 3 D seismic vulnerability of bridge components are accomplished in accordance with the bridge seismic design codes in various countries and the reliability theory of engineering structures. A simplified validation of one-dimensional seismic vulnerability shows that the proposed method can be applied to the seismic vulnerability analysis of bridge structures,with a maximum probability deviation of less than 4% from the traditional probabilistic seismic demand analysis(PSDA) method.
【Fund】: 国家重点研发计划资助项目(2016YFC0802202);; 国家自然科学基金资助项目(51678489);; 四川省科技计划资助项目(2016JY0130);; 云南省交通运输厅科技项目(2017(A))
【CateGory Index】: U442.55
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