抗力分项系数的概率极限状态设计法  

Probabilistic limit state design method for determination of resistance partial factors

作　　者：王鑫[1] 闫振国 邹思敏[1] 

机构地区：[1]华中科技大学武昌分校,湖北武汉430064 [2]湖北鸿业建筑设计有限公司,湖北武汉430056

出　　处：《兰州理工大学学报》2013年第5期121-125,共5页Journal of Lanzhou University of Technology

摘　　要：针对现行规范规定的承载能力极限状态下设计表达式中存在的缺陷,基于概率极限状态设计法建立承载能力极限状态下仅有简单荷载组合作用时求解抗力分项系数的公式.在确定抗力分项系数时通过设定不同的参数数值(荷载效应组合、荷载效应比、抗力变异系数、结构破坏类型、安全等级等)及可靠度分析,对结构的承载能力极限状态进行研究,求出与结构可靠指标一一对应的抗力分项系数.Aimed at the defects in the designing expression of bearing capacity limit states prescribed in current specifications, a formula for solving resistance partial coefficient in the case of simple load combinations was derived based on the probability limit state design method. A one-to-one correspondence of the partial safety factor to the structural reliability index was obtained by setting different parameter values （load effect combination, load effect ratio, resistance coefficient of variation, structure damage type, safety level, etc）, reliability analysis and conducting a research on the structure of the ultimate limit state.

关 键 词：概率极限状态 抗力分项系数 荷载效应比 抗力变异系数 设计基准期 设计使用年限 

分 类 号：TU318.1[建筑科学—结构工程]