钢筋混凝土框架结构强柱弱梁的概率分析  

Probability analysis is for strong column-weak beam design of reinforced concrete frames

作　　者：夏倩[1] 

机构地区：[1]同济大学土木工程学院建工系,上海200092

出　　处：《四川建筑科学研究》2010年第3期13-16,共4页Sichuan Building Science

基　　金：国家自然科学基金重点资助项目(50538086)

摘　　要：通过对可靠指标的考核,指出目前"强柱弱梁"设计方法在适用范围方面所存在的不足,并根据提出的目标可靠指标,提出相应的柱端弯矩增大系数。先采用可靠度理论分析框架结构单节点"强柱弱梁"设计的可靠指标以及对应的失效概率,然后考虑主要影响梁柱强弱的设计参数的随机性,分析柱端弯矩增大系数的合理取值为多少,框架结构才能达到可以接受的形成"柱铰机构"概率。结合以往有关专业人士对柱端弯矩增大系数的多方面研究,总结出比较合理的CMAF值,并在概率的基础上对弯矩增大系数提出合理的修正意见。Though the reliable indicator of assesment,desigh of strong column weak beam＇s method is limited,by analyzing reliability index.Finally,moment magnification factor at ends of columns is presented by taking account of target reliability index.At first,the failure probability of＂strong column-weak beam＂design for a RC frame with single beam-column joint is analyzed.and then the randomnesses of maior design parameters,analyze the reasonable valueable number of the moment magnification factor at ends of columns,the acceptable probability of forming＂column hinge mechanism＂can be achieved.The professionals concerned with the past study in the aeras of the moment magnification factor at ends of columns,summing up the reasonable number,and make the reasonable amendment of the the moment magnification factor at ends of columns on the basis of probability.

关 键 词：强柱弱梁 抗震可靠度 柱铰机构 柱端弯矩增大系数(CMAF) 

分 类 号：TU375.1[建筑科学—结构工程]