Research on Seismic Vulnerability of High-Pier and Long-Span Bridges Based on Improved IMK Resilience Model

After the fragility curve is established, probability of structural damage reaching each level under action ground motion can be determined according to parameters, so as calculate direct and indirect loss caused by complete earthquake prediction. This paper combines improved IMK resilience model study seismic vulnerability high-pier long-span bridges. Moreover, this obtains parameter calculation based on regression analysis PEER’s 255 column specimen data. The needs modify elastic stiffness strain hardening rate rotating spring ensure accuracy lateral component. experimental research shows that bridges restoring force has a certain analytical effect.