邱冬瑞¹，吕天启¹，薛  祥²
(1北京市建筑工程研究院，北京100039; 2北京市勘察设计研究院有限公司，北京100038)

[摘要] 本文综合考虑模糊综合判别与结构力学模型的方法，对既有轻钢结构进行抗震安全级别鉴定。具体来说，就是通过对结构的力学模型分析，为结构及模糊评判结果提供定性工程判断；通过确定影响结构安全性模糊变量的隶属度，形成损伤或破坏因素的评判矩阵，采用三级模糊推理逻辑运算，判定轻钢结构的抗震安全性，此为定量评判。本方法对轻钢结构抗震安全级别的综合评判有工程实际意义，有利于轻钢结构抗震鉴定工作的标准化、规范化和科学化。
[关键词] 轻钢结构；抗震鉴定；模糊综合评判；力学模型

Fuzzy comprehensive evaluation method in the existing light steel structure's seismic evaluation
Qiu Dongrui¹, Lu Tianqi¹, Xue Xiang²
(1 Beijing Building Construction Research Institute, Beijing 100039, China; 2 Beijing Geotechnical Institute Co.,Ltd., Beijing 100038, China)

Abstract: In this paper, considering fuzzy comprehensive evaluation and structural mechanics model, evaluate the seismic safety level of the existing light steel structure. Specifically, through analysis of the mechanical model of structure, determine qualitative engineering judgment for structure and qualitative results of fuzzy evaluation. By identifying the membership degree of impacting structural safety fuzzy variables, form evaluation matrix of factors of injury or damage, by three-stage fuzzy inference logic operations, determine the seisnuc safety oflight steel structure, which is quantitative evaluation. This method of comprehensive evaluation for light steel structure's seismic safety level has practical significance and is conducive to be standardized and scientific for seismic identification work oflight steel structure.
Keywords: light steel structure; seismic evaluation; fuzzy comprehensive evaluation; mechanical model