摘要
本文提出截面曲率延性Ｋ１、Ｋ２和Ｋ３的概念，来描述二类截面局部失稳对连续组合梁内力重分布的影响，采用非线性增量迭代法，分析了３６组二跨连续组合梁承受均布荷载时弯矩重分布的情况。研究表明：二类截面连续组合梁的局部失稳，可采用对中间支承处弯矩调幅３０％来等效。本文提出的设计方法，可避免复杂的弹塑性稳定计算。
Local buckling of continuous composite beams with Class 2 sections and its contribution to the moment redistribution of the beams are analyzed in this paper using the ductility curvature ratio K1、K2 and K3. Two groups of continuous composite beams with two equal-span.and two unequal-span,36 beams in total,under uniformly distributed loading are studied by means of non-linear iteration method.The results show that the moment redistribution induced by the local buckling of a continuous composite beam with Class 2 section is beyond 30% cutting down at the internal support.The method presented for buckling design in the paper is quite simple as it can avoid the complicated elastoplastic buckling calculation.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
1995年第6期30-37,共8页
Journal of Building Structures
