山区桥梁墩柱长度系数计算方法研究

摘要

The calculation of effective length of the pier is a difficult problem for the design of moun-tainous highway bridges.Taking a highway bridge under construction for example,the calculation method of effective length of the pier is studied.The current analytical calculation method based on the Euler formula is described.Then a finite element model to take structural buckling analysis is cre-ated,and the effective length of the pier is got.According to the comparison of the two methods,fi-nite element analysis method is more accurate because of its comprehensive consideration of the bound-ary conditions and transverse linkages of the pier.%桥墩的计算长度问题是山区高速公路桥梁设计中的难题。文中以某在建的高速公路桥梁为工程实例，分析探讨桥墩长度系数的计算方法，并介绍目前常用的通过欧拉公式推导长度系数的计算方法，再建立有限元模型进行结构屈曲分析，得到桥墩的计算长度系数。分析比较2种方法可知，结构有限元屈曲分析法能够更准确地考虑桥墩的边界条件及横向联系作用，计算精度更高。