碳纤维加固大偏心受压柱承载力可靠性  

Reliability of bearing capacity for large eccentric compression column strengthened with CFRP

作　　者：蔡斌[1] 武安盛 赵良龙 

机构地区：[1]吉林建筑大学土木工程学院,吉林长春130118

出　　处：《混凝土》2018年第2期9-12,共4页Concrete

基　　金：国家自然科学基金(51378238);住房和城乡建设部科学技术项目(2017-K9-047)

摘　　要：为了研究碳纤维(CFRP)加固大偏心受压柱承载力可靠度变化规律,应用JC法计算其可靠度指标,考虑初始偏心距、荷载效应比对可靠度指标的影响,同时考虑受弯和受压承载力,应用科学计算软件MATLAB进行数值分析。分析结果表明:柱在加固前,柱受压、受弯和压弯承载力可靠度指标均随着初始偏心距和荷载效应比的增大而减小,减小趋势逐渐减缓;柱在加固后,可靠度指标明显提高,其中柱受压承载力可靠度指标受初始偏心距的影响较小。In order to research the rules of bearing capacity of large eccentric compression column strengthened with CFRP, the reliability index was calculated by JC method, the influence of initial eccentricity and load effect ratio on the reliability index were considered, at the same time, the compression capacity and bending capacity were taken into account, the reliabilities were calculated of numerical exam- pies by scientific computing software MATLAB.The results show that before the column is reinforced, the reliability index of the compres- sion capacity, bending capacity, compression and bending capacity of the column decreases with the increase of the initial eccentricity and the load effect ratio ,and the decreasing trend is gradually slowed down.After the column is reinforced,the reliability index of the column increases clearly, the reliability index of the compression capacity is very little affected by the initial eccentricity.

关 键 词：CFRP 大偏心受压柱 JC法 可靠度指标 

分 类 号：TU528.01[建筑科学—建筑技术科学]