Seismic risk analysis of high-speed railway bridges based on new seismic hazard model

Combining the distribution characteristics of seismic hazard data in the log-log space and the features of the classical power-law model, a new seismic hazard model based on quadratic polynomials was proposed, and its application on actual seismic hazard data of various cities was briefly discussed. Then, by analyzing the composition of the analytical solution of the power-law model, a semi-analytical solution based on the new hazard model was derived to solve the engineering demand parameter (EDP) demand hazard and seismic risk probabilities, and the accuracy of the solution was verified by numerical integration. Next, the case study proved that the proposed semi-analytical solution has higher computational accuracy compared to the classical power-law model. Finally, the proposed new seismic hazard model and semi-analytical solution were used to conduct seismic risk analysis of a high-speed railway bridge.