Vulnerability and economic loss evaluation model of a typical group structure considering empirical field inspection data

Abstract

Evaluating the earthquake economic loss of building clusters is an essential index to measure regional seismic risk and resilience. This study developed a rapid financial loss evaluation model based on the empirical vulnerability parameters of the group structure. The quantitative failure parameters used to evaluate the seismic vulnerability of regional group structures are optimized comprehensively, and a loss evaluation model considering the economic vulnerability index is innovatively proposed. The empirical vulnerability database (field survey data of 212 destructive earthquakes in China from 1975 to 2013 (98,916.841 × 104 m2 buildings)) of typical structures is established. An updated model for structural economic loss assessment is proposed. Using the proposed innovation model and probability statistical method, the economic loss evaluation model and database of typical group structures based on the economic vulnerability index are developed. Using the nonlinear Gaussian distribution and the actual cumulative damage quantification method, the economic loss evaluation comparison model and mean value calculation model of five typical buildings considering the empirical group structural vulnerability database are performed. Ultimately, combined with the proposed innovative quantitative model, the economic vulnerability index matrix (database) and point cloud of typical group structures of 212 destructive earthquakes in China are calculated. The proposed model can cooperate with the macroseismic intensity standard to realize the rapid economic loss assessment of typical buildings. The results of this study can contribute to the evaluation of the economic losses of building clusters in multiple macroseismic intensity regions.