铁路斜拉桥静力稳定性有限元分析  

Finite Element Analysis on Static Stability of Railway Cable-stayed Bridge

作　　者：卢永飞[1,2] 

机构地区：[1]西北民族大学土木工程学院,甘肃兰州730030 [2]甘肃省新型建材与建筑节能重点实验室,甘肃兰州730030

出　　处：《城市道桥与防洪》2016年第1期43-45,8,共3页Urban Roads Bridges & Flood Control

摘　　要：以某在建双塔五跨部分预应力混凝土斜拉桥为工程背景,在理论分析有限元法计算稳定系数的基础上,用软件Midas/Civil对该桥进行有限元建模,从施工阶段和运营阶段两个方面分析各工况下的安全稳定系数及相应的失稳模态,得出该桥在各典型悬臂法施工阶段和成桥运营阶段的整体稳定性均良好,且各典型施工阶段的稳定性要大于成桥运营阶段的稳定性。Taking a double-pylon five-span partial pre-stressed concrete cable-stayed bridge under construction as the engineering background,and on the basis of theoretical analysis and calculation of stability coefficients by the finite element method,the software of Midas/Civil is used to establish the finite element model of this bridge.The article analyzes the safety and stability coefficients and the relevant unstability mode under various conditions from the construction period and operation period.The result shows that the integrated stabilities of this bridge are all good in the construction period by various typical cantilever methods and the operation period of the finished bridge,and the stabilities of various construction periods are larger than the operation period of finished bridge.

关 键 词：斜拉桥 有限元法 稳定性分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]