关键词: 地震灾害区域宏观脆弱性, 空间变化, 脆弱性模式, 京津唐地区

Abstract: Based on exploring and clarifying the conceptual implications,analytical hierarchies and the descriptive aspects of Regional Scale Macroscopic Vulnerability to Earthquake Disasters(RSMVED),and taking Beijing,Tianjin and Tangshan area and its relevant situations in 2000 as example,an index system composed of 25 individual indexes for describing and assessing the RSMVED of the studied area has been set up first in this paper.Then,according to this index system and mainly with the help of Principal Component Analysis method,the spatial change characteristics and regularities of RSMVED of the studied area have been generalized preliminarily but quantitatively and comprehensively.The result shows that,in the researched area,there are 6 main vulnerability patterns controlling the spatial change behaviors of its RSMVED,and the regional differences in style,extent and driving force manifested by these patterns are quite different.Further analysis presents that it is the urban spots of each large and middle-sized cities like Beijing,Tianjin,Tangshan,Qinhuangdao and Chengde,etc that are the most vulnerable with their RSMVED level much higher than the average of the whole studied area.The areas whose RSMVED level is apparently lower than the area's average mainly concentrate in the suburb counties of both Beijing and Tianjin municipalities.Except for these urban spots and such suburb counties,the vulnerability status of other parts of the studied area nearly all fluctuates slightly around the area's average vulnerable level by some small amplitude.

Key words: regional scale macroscopic vulnerability to earthquake disasters(RSMVED), spatial change, vulnerability pattern, Beijing, Tianjin and Tangshan area