铁道科学与工程学报Issue(6)：1379-1386,8.
大悬臂展翅预应力混凝土宽箱梁桥极限承载力分析
Analysis of ultimate bearing capacity of prestressed concrete box -girder bridge with large -cantilever -wing
摘要
Abstract
To study the ultimate bearing capacity of the large cantilever structure,an accurate space finite ele-ment model was built for numerical analysis with the background of a prestressed concrete box -girder bridge with large -cantilevev -wing.Taking into account of the geometric nonlinearity and the material nonlinearity, the structure ultimate bearing capacity and the distribution regularity of cracks under three load cases(eccentric concentrated load,symmetrical concentrated load and uniform distributed load)were analyzed.It is concluded that the structure ultimate bearing capacity under the load case of symmetrical load is larger than that under the case of asymmetrical load;the distributions of the stress and cracks under the load case of asymmetrical load are also asymmetrical and cracks are more likely to appear in the root of the cantilever wing.The stress condition of side span is worse than mid -span under uniformly distributed load.关键词
极限承载力/大悬臂/展翅箱梁/非线性/裂缝Key words
ultimate bearing capacity/large -cantilever -wing/box -girder/nonlinear/crack分类
交通工程引用本文复制引用
余晓琳,贾布裕,杨铮,颜全胜..大悬臂展翅预应力混凝土宽箱梁桥极限承载力分析[J].铁道科学与工程学报,2015,(6):1379-1386,8.基金项目
国家自然科学基金资助项目（51208208）；中央高校基本科研业务费专项资金资助项目（2014ZZ0019）；广东省交通运输厅科技项目 （）
