Abstract
Fragility analysis for highway bridges has become increasingly important in the risk assessment of highway transportation networks exposed to seismic hazards. This study introduces a methodology to calculate fragility that considers multi-dimensional performance limit state parameters and makes a first attempt to develop fragility curves for a multispan continuous (MSC) concrete girder bridge considering two performance limit state parameters: column ductility and transverse deformation in the abutments. The main purpose of this paper is to show that the performance limit states, which are compared with the seismic response parameters in the calculation of fragility, should be properly modeled as randomly interdependent variables instead of deterministic quantities. The sensitivity of fragility curves is also investigated when the dependency between the limit states is different. The results indicate that the proposed method can be used to describe the vulnerable behavior of bridges which are sensitive to multiple response parameters and that the fragility information generated by this method will be more reliable and likely to be implemented into transportation network loss estimation.
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Supported by: National Natural Science Foundation of China Under Award Number 50878184; National High Technology Research and Development Program (863 Program) of China Under Grant No. 2006AA04Z437; Graduate Starting Seed Fund of Northwestern Polytechnical University Under the Grant No. Z2012059
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Wang, Q., Wu, Z. & Liu, S. Seismic fragility analysis of highway bridges considering multi-dimensional performance limit state. Earthq. Eng. Eng. Vib. 11, 185–193 (2012). https://doi.org/10.1007/s11803-012-0109-1
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DOI: https://doi.org/10.1007/s11803-012-0109-1