大跨度钢管混凝土拱桥的双重非线性稳定性研究  

Dual Non-Linear Stability Research on Long-Span Concrete-Filled Steel Tubular Arch Bridge

作　　者：韩兴[1] 祝兵[1] 张磊[1] 朱建波[2] 向宝山[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]江苏省交通厅勘测设计院,江苏南京210005

出　　处：《重庆交通大学学报（自然科学版）》2013年第S1期856-859,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：铁道部科技研究开发计划重点课题(2012G013-C)

摘　　要：以鸭池河桥为工程背景,研究了大跨度钢管混凝土拱桥在材料和几何双重非线性下的稳定性能,对比分析了单独考虑几何非线性和考虑双重非线性两种情况下桥梁的稳定安全系数和拱顶位移情况,并分析了横撑、拱脚角等因素对于桥梁稳定的影响。结果表明:双重非线性稳定下桥梁的稳定性的安全系数与弹性状态下相比有着一定的下降,在实际分析的时候不能忽略双重非线性对于桥梁稳定的影响的结论;单独考虑几何非线性意义不大。Taking Yachihe bridge as the engineering background,the stability performance about the large span concrete filled steel tubular arch bridge under the material and geometrically dual nonlinear condition was studied.The stability safety factors and displacement condition of apex of arch were compared and analyzed,considering geometric nonlinearity and double nonlinear respectively.And the influence factors,such as the cross arm and skew angle,on the stability of the bridge were also analyzed.The results indicate that the safety factor of the stability in the double nonlinear stability of bridge has a certain decline,compared with that in elastic state.So the double nonlinear effect on the bridge stability can't be ignored in actual engineering.And there is little sense to separately consider the geometric nonlinear.

关 键 词：钢管混凝土拱桥 双重非线性 稳定性分析 稳定性影响因素 

分 类 号：U448.22[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]