已有砌体结构抗震可靠度分析的实用方法  

PRACTICAL METHOD FOR ASEISMIC RELIABILITY ANALYSIS OF EXISTING MASONRY STRUCTURES

作　　者：任晓崧[1] 王嵩[1] 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《工业建筑》2008年第7期19-22,共4页Industrial Construction

摘　　要：应用以层次分析法和一次二阶矩法为基础的实用简化方法分析已有结构的可靠度,将楼层中各构件的可靠度按照权函数(修正的构件的荷载/抗力比)组合成楼层的可靠度,以楼层可靠度的最小值作为系统的可靠度;砌体结构在地震作用下发生剪切破坏为主要的结构失效模式,将墙体的抗剪能力减去其分担的地震作用定义为抗震可靠度分析的功能函数,墙体的抗剪能力套用现行设计规范的计算公式;选用工程实例说明了已有砌体结构抗震可靠度分析的实用方法。A simplified method is used for evaluating the reliablity for the existing strucural system, which is based on the analytical hierarchy process and the first-order second - moment method. Combination of the reliability of members by different weighing parameters （ ratio of load vs. resistance with some modifications） is defined as the storey reliability. The minimum value of the storey reliability is defined as the reliability of the whole structural system. The shear failure model of wall is the main fault model of wall member under earthquake, so the benefit function is defined as the shear resistant capacity of the wall minus the corresponding earthquake reaction. The formula of the shear resistant capacity of wall in the current design code can be used here. Engineer case is presented here to demonstrate this method for aseismic reliability of the existing masonry structures.

关 键 词：现有结构 砌体结构 抗震可靠度 权函数组合 剪切破坏模式 

分 类 号：TU352.11[建筑科学—结构工程]