重庆大学学报2017，Vol.40Issue(9)：1-7,7.DOI:10.11835/j.issn.1000-582X.2017.09.001
考虑刚度折减的弹性二阶分析法在双跨排架结构中的运用
The application of elastic second-order method with considering stiffness reduction to two-span bent structure
摘要
Abstract
Second-order effect of structural members is usually analyzed with a practical and effective elastic finite element method in the design of frame structure.The method considers the stiffness reduction of structural members,the structural geometric nonlinearity and the material nonlinearity,and its accuracy mainly depends on the rationality of stiffness reduction factor.Until now,there has no research on the stiffness reduction factor of the two-span bent structure.34 typical single story equal-leg two-span bent columns were taken as the object to carry out the elastic second-order analysis and the nonlinear static analysis under the most unfavorable loads.Taking the equivalence of the entirety second-order effect as the target,a unified stiffness reduction ratio is suggested which is compliant to two-span bent columns.And the effectiveness of the elastic second-order method with considering stiffness reduction in two-span bent structure and the rationality of the stiffness reduction factor is proved through comparing the nonlinear analysis to multi two-span bent structures.关键词
排架结构/静力非线性分析/弹性二阶分析/刚度折减系数Key words
bent structure/nonlinear static analysis/second-order elastic analysis/stiffness reduction factor分类
建筑与水利引用本文复制引用
刘毅,刘年朋,卓子,蒙秀凡..考虑刚度折减的弹性二阶分析法在双跨排架结构中的运用[J].重庆大学学报,2017,40(9):1-7,7.基金项目
国家自然科学基金资助项目(59678035).Supported by National Natural Science Foundation of China(59678035). （59678035）
