摘要
以大跨S形曲线连续刚构桥为研究对象,对自重、混凝土的收缩徐变、预应力荷载作用下结构的径向位移进行了分析,分析表明自重和徐变是影响径向位移最重要的因素。同时计算静风荷载作用下大悬臂的径向位移,结果表明,在最不利风载工况下该桥的两幅桥有可能会发生横向碰撞,提出了建议措施。
The radial displacement of a continuous S-shaped curved rigid frame bridge with long span and S-shaped girder in its maximum cantilever construction stage is analyzed. It is concluded that the radial displacement in this construction stage is influenced more notably by the self weight and the creep of concrete than the prestressed load and the shrinkage of concrete. Besides, the displacement of the maximum cantilever under the static wind load demonstrated that the end of one cantilever may collide transversely with the body of the other one during construction when they are paralleled closely with each other. Some beneficial advices and methods are given at the end of the paper.
出处
《华中科技大学学报（城市科学版）》
CAS
2008年第2期96-99,共4页
Journal of Huazhong University of Science and Technology
关键词
曲线连续刚构桥
悬臂施工
径向位移
横向碰撞
curved rigid frame bridge
cantilever construction
radial displacement
transversecollision
