基于能量法分析大跨连续刚构桥高墩稳定性  

Stability analysis of high piers and large span continuous rigid frame bridge based on energy method

作　　者：邬晓光[1] 李艺林[1] 贺攀[1] 冯宇[1] WU Xiaoguang;LI Yilin;HE Pan;FENG Yu(Key Laboratory for Bridge and Tunnel of Shaanxi Province, Chang’an University, Xi’an 710064, China)

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《铁道科学与工程学报》2017年第2期290-295,共6页Journal of Railway Science and Engineering

基　　金：陕西省交通运输厅科技资助项目(13-25k)

摘　　要：通过平动约束、转动约束和平转动耦合约束来模拟基础对墩底的约束作用,成桥状态下采用平动约束和转动约束弹簧来模拟墩顶的边界约束,依据弹性稳定理论和能量法推导出不同状态下高墩临界荷载的计算公式。最后将有限元模型理论解和本文公式计算值进行对比,验证了公式的正确性和适用性。In this paper, the constraints of the foundation to piers are simulated by exerting the translational constraint, the rotational constraint and the flat rotation coupling constraint at the bottom of piers. Under completion state of bridge, the boundary constraint is simulated by exerting the translational constraint and the rotational constraint spring at the top of piers. Then, the recursion formula of high piers’ critical load under different states can be established based on the elastic stability theory and the energy method. Finally, the theoretical solution of the finite element model and the calculated value of the formula are compared to verify the correctness and applicability of the formula.

关 键 词：高墩稳定性 连续刚构桥 双柱刚架模式 临界荷载 计算公式 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]