基于模糊相似理论的地震易损性分析方法  

New earthquake loss assessment methodology based on fuzzy similarity theory

作　　者：苏亮[1] 向畅[1] 蒋亦庞 Su Liang Xiang Chang Jiang Yipang(College of Civil Engineering and Architecture, Zhejiang university, Hangzhou 310058, China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058

出　　处：《华中科技大学学报（自然科学版）》2017年第8期74-80,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家科技支撑计划资助项目(2012BAJ07B03)

摘　　要：结合决策分析中的层次分析法,提出了一种基于模糊相似理论的地震易损性分析方法.该方法无须进行结构建模计算即可通过类比分析实现其地震性能评估,极大地提高了结构地震易损性分析的计算效率.以钢筋砼框架结构为例,选取影响结构抗震性能的主要参数,应用层次分析法得到各主要结构参数的权重系数,然后分析其属性函数的斜率值,最后计算两栋结构之间的模糊相似度,由此可通过类比分析实现目标结构的易损性评估.对三组钢筋砼单体结构进行了算例计算,并将其与有限元结果进行比较,验证了所提方法的准确性和可靠性.Combing the analytical hierarchy process of decision analysis,a new earthquake loss assessment method based on fuzzy similarity theory was proposed.Using analogy analysis,structural seismic performances could be evaluated with no need of real structural models calculations.Thus the numerical computational efficiency of structural seismic vulnerability could be increased enormously.Taking RC frame structures as examples,the main structural factors that affect the structural seismic performance were selected firstly.Secondly the weight coefficients of factors were calculated by analytical hierarchy process,and the slope values of attribute function of those factors were calculated statistically respectively.At last,the similarity degree of two buildings was computed by fuzzy similarity theory and the seismic vulnerability of target structures could be evaluated with the aforementioned processes.The proposed method and the finite element method are implemented to three groups of representative structures respectively,and the precision and applicability of the proposed method are validated.

关 键 词：结构参数 模糊相似理论 层次分析法 相似度 地震易损性 

分 类 号：TU375[建筑科学—结构工程]