Seismic Assessment of Algerian Bridge

Abstract

This study focused on the probabilistic risk assessment of reinforced concrete piers bridges subjected to ground motion excitation. In order to assess the vulnerability of Piers Bridge, a case study of a typical Algerian highway bridge is presented, illustrating the seismic performance and damage evaluation method. Pushover and incremental dynamic analysis using several earthquake records is implanted to determine the fragility curves reflecting the probability of various damage occurrences. These fragility curves provide the probability of exceeding the multiple damage states for a given intensity of ground motion excitation. To develop the fragility curves, a nonlinear static pushover and incremental dynamic time-history analysis have been performed using the SeismoStruct nonlinear analysis program for bridge model to develop fragility curve, this study includes comparison between real or artificial ground motions selection, IDA is performed using a set of 18 real ground acceleration records and 8 artificial ground acceleration records of similar seismo/geological origins. Finally, the developed fragility curves can be used to assess the seismic performance of Piers Bridge and help to decision making for effective retrofitting technique.