浏阳河洪山大桥异形斜拉桥主梁空间受力及稳定性分析  

Spacial analysis of internal force and stability on cable-stayed bridge without back stay over Liuyang river

作　　者：戴公连[1] 李德建[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《中国公路学报》2002年第3期53-56,共4页China Journal of Highway and Transport

摘　　要：采用空间剪力柔性梁格离散桥面结构 ,建立了大悬臂钢脊骨箱梁主梁—混凝土桥面组合截面徐变内力重分布计算的初应变法 ,编制了模拟无背索斜塔异形斜拉桥施工过程和使用阶段的空间内力及稳定分析程序。以此为基础 ,分析计算了长沙市环线浏阳河洪山大桥无背索斜拉桥主梁内力分布规律、徐变内力重分布对结构内力分配的影响、结构的整体稳定性安全系数等 ,为该桥的设计施工提供了依据。The initial strain method of calculating internal force of redistribution by creep in concrete steel combined section is established based on the flexible shear grillage,the program of internal force and space stability analysis of cable stayed bridge without back stay is also developed.Based on the above,the principle of internal force distribution and the safty factor of cable stayed bridge without back stay in Liuyang river are presented.

关 键 词：浏阳河洪山大桥 主梁 稳定性分析 无背索斜拉桥 空间分析 徐变内力重分布 稳定安全系数 受力分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U443.35[交通运输工程—道路与铁道工程]