墩梁固结桥桥墩整体屈曲计算长度分析论文

墩梁固结桥桥墩整体屈曲计算长度分析

摘要：为准确考虑墩梁固结桥桥墩整体屈曲失稳，本文取四跨墩梁固结桥，用位移法建立桥墩失稳通用平衡方程组以求得计算长度系数。该平衡方程组中，不仅考虑了线位移刚度和转角刚度的耦合影响，还考虑了单墩在轴向力作用下刚度的影响，并考虑了其余墩在轴向力作用下的整体屈曲反应。最后，通过解析给出各计算长度系数的对比结果。

关键词：计算长度系数，墩梁固结，屈曲，桥墩

abstract: a method is presented for investigating the stability and buckling of piers of pier-girder-consolidation bridge more exactly. taking four-span bridge for example, an equation by the displacement method is derived for the calculation of the effective length factor. the equation not only considers the coupling influence of displacement and rotation rigidity, but also the effect of axial force of the investigated pier on its rigidity and the effect of other axial forces on the buckling behavior of the whole four-span bridge. finally, the paper displays comparisons between analytical solutions of different situations.

key words: effective length factor, pier-girder

consolidation, buckling, pier

中图分类号：s773.4 文献标识码：a 文章编号：