Seismic risk and loss estimation models for building clusters considering the effects of the earthquake intensity and temperature field
Si‐Qi Li
Abstract
Earthquake disasters and extreme temperature fields directly affect the vulnerability and economic losses of building clusters. Seismic intensity measures and structural capacity indicators are widely used to evaluate the seismic fragility and economic losses of buildings. However, the dual effects of low-temperature fields and seismic intensity on the estimation of building economic damage have been considered less. This article proposes a structural seismic hazard model that considers the coupling effect of the seismic intensity and temperature field, utilizing the theory of seismic hazard and risk assessment. An innovative structural seismic vulnerability and loss evaluation function based on the influence of the temperature field was proposed. Four types of building damage samples (170,388,204 sq. m) and temperature data were statistically classified from 12 typical earthquakes (6 in low-temperature fields and 6 in normal-temperature fields) in Xinjiang, China, between 1995 and 2024. An economic loss assessment model for regional building clusters considering the temperature field and seismic intensity measures was developed using probabilistic vulnerability and risk analysis methods. A function for evaluating the actual seismic losses and vulnerability of structures under different temperature fields using nonlinear regression and cumulative economic loss functions is proposed. A structural economic loss evaluation curve is generated considering the effects of temperature fields and intensity measures. A novel calculation method for evaluating the number of people who have lost their homes after an earthquake has been proposed, which combines the dual effects of the temperature field and seismic intensity measures on structural vulnerability.