梁桥横向稳定验算中倾覆轴的选取  

Selection of Overturning Axis in Lateral Stability Calculation of Girder Bridge

作　　者：周子杰[1] 阮欣[1] 石雪飞[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《重庆交通大学学报（自然科学版）》2013年第5期907-910,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51108338);上海市城乡建设和交通委员会基金项目(2012-003-001)

摘　　要：基于目前工程中采用倾覆稳定系数对梁桥横向稳定进行验算的方法,讨论了不同支座布置形式、不同曲率半径条件下结构倾覆轴的选取。理论推导和有限元计算结果表明:联端外侧两支座连线外无支座的直线梁桥和大曲率半径的曲线梁桥,倾覆轴应选取该连线;联端外侧两支座连线外有支座的曲线梁桥,倾覆轴应选取跨中位置相邻两跨外侧支座的连线。According to the method that overturning stability coefficients used to verify the lateral stability of bridge in current engineering practice,the selection of overturning axes in the cases of different bearing arrangements and different curvature radius was discussed.Both theoretical analysis and FEM calculation results indicate that both for straight girder bridge and curved bridge with large radius,lateral overturning around the axis through the outboard bearings at the abutments of both ends should be checked.For curved bridge with relatively small radius,whose bearings arranged outside the axis through the outboard bearings,lateral overturning around the axis through two outboard bearings of adjacent spans in the middle of the bridge should be checked.

关 键 词：梁桥 横向稳定 倾覆轴 

分 类 号：U441[建筑科学—桥梁与隧道工程]