Fragility Analysis of the Double-column Bent With the SCEB Under Near-field Pulse-like Ground Motions in Transverse Direction

To investigate the seismic resilience of the bridge piers, the seismic fragility analysis of double-column bent with additional SCEB was carried out based on incremental dynamic analysis method, and the maximum drift ratio and residual drift ratio were selected as performance indicators to systematically study the failure probability of the bent under near-field pulse-like ground motions. For comparative analysis, 60 far-field non-pulse-like ground motion records were also selected. Results show that SCEB only provides stiffness and strength for the bent under minor earthquakes, and it can also provide the stable energy dissipation capacity and good self-centering capacity under major earthquakes. The SCEB can effectively reduce the failure probability (maximum drift ratio and residual drift ratio) of the bent under near-field pulse-like ground motions, especially the residual drift ratio. The failure probability of the double-column bent with SCEB under near-field pulse-like ground motion was greater than that under far-field non-pulse-like ground motion.SCEB can effectively reduce the failure probability of the bent and enhance the seismic performance.