Abstract
This paper represents the seismic behavior of multi-span highway bridges subjected to different PGA. There are many techniques of seismic assessment using computer technologies of which fragility analysis is one of them. Fragility analysis is a system reliability analysis to evaluate the seismic loss in a built environment. The methods used in this paper involve modeling the bridge using SAP2000 and using the peak ground acceleration from past earthquake data as input data to the software to examine whether the structure could be further affected by horizontal or vertical ground movement. In this paper, SAP2000 is used to conduct non-linear static analysis and non-linear dynamic analysis subjected to different PGA’s that represent 12 historical earthquakes. The main objective of this study is to determine conventional and unconventional fragility curves. Finally, by considering different structural parameters, the fragility curves with the assumption of a log-normal distribution are obtained based on the capability and demand of the bridge structure.
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