考虑墩身自重的装配式梁桥高墩计算长度系数分析

Parameter analysis of high-pier's effective length coefficient of prefabricated bridge considering the dead weight

考虑装配式梁桥高桥墩墩身自重和非理想边界条件对一阶临界失稳力的影响,通过欧拉公式给出计算长度系数的计算方法;结合成桥与施工阶段算例分析墩身自重对计算长度系数的影响,结果表明:高墩的计算长度系数考虑墩身自重会使计算长度系数偏小;考虑墩身自重对施工阶段计算长度系数影响较成桥阶段大,在桥梁高墩设计中应引起注意。

Considering the pier body weight of the prefabricated beam bridge with high piers and the nonideal boundary conditions＇ influence to the first-order critical buckling force,the thesis tends to use euler formulato calculate the length coefficient and to analysize the pier body weight＇ influence to the length coefficient in terms of the examples of the finished and the unfinished stage it turns out that the pier body weight reduce the high pier＇s length coefficient during the calculation,and the impact tends to be more in the unfinished stage rather than that of the finished stage,which should be paid special attention to.