Improved TOPSIS model on urban earthquake vulnerability assessment
YANG Jingwen;WANG Junjie;College of Engineering,Ocean University of China;
The vulnerability of the urban earthquake disasters is usually studied as an single urban object, which has the problem that the differences between different urban regions are ignored. To solve this problem, a seismic evaluation model based on smaller urban areas is established, the Weihai downtown is selected as a research object, and the research scope is refined into 22 regions. Seventeen indices selected from four aspects, including the population, economy, buildings and lifeline system, are used to construct the evaluation index system of urban seismic vulnerability. By using triangular fuzzy entropy and improved TOPSIS model, the relative closeness of the study area is calculated and sorted, and Weihai is divided into four different vulnerability grades. The results show that the improved TOPSIS model is able to rate the vulnerability of urban earthquake disaster in the refined smaller regions, and provide a new idea for making measures for reducing and preventing earthquake disaster in the city.