基于弹性二阶分析的排架柱计算长度

The Effective Length of Bent-columns Based on the Second-order Elasticity Analysis

在筛选出影响排架柱截面设计的最不利荷载组合的基础上,完成了系列单层单跨排架考虑二阶效应的弹性有限元分析,得到排架柱包括二阶效应在内的真实内力,最后再由弹性二阶分析结果求得排架柱的偏心距增大系数η,通过选取合适的η-l0关系,得到与η相配套的排架柱计算长度。

According to the worst-case load combinations which determine the section design of bent columns, a series of second-order elasticity analysis of single story single-span bent frames have been completed, and internal force including second-order effect have been acquired . Based on the eccentricity magnification factor η and relation of η-l0, the effective length l0, suggestion of bent-columns have been made in this paper.