自重作用下高墩大跨曲线连续刚构桥空间受力分析

摘要

以一座典型的连续刚构桥为背景，考虑悬臂施工阶段结构自重与悬浇预应力的影响，通过选取不同的曲率半径及墩高，利用有限元程序对最大悬臂状态施工阶段的曲线连续刚构桥应力和变形进行了分析，重点研究了曲率及墩高的影响。通过分析，为曲线刚构桥提供了相应的设计建议和施工控制思路。%Take a typical continuous rigid-frame bridge as the background, and through the selection of curvature radius and pier height, this paper takes the influences of stage structure self-gravity of cantilever construction and suspended casting prestress into consideration, and analyses the stress and deformation of curved continuous rigid-frame bridge in the biggest cantilever construction stage with finite element program, pays much attention to the research of the influences of curvature and pier high. Through the analysis, the author provides the corresponding design suggestions and construction control ideas for the curved rigid-frame bridge.