连续刚构跨中下挠的参数影响分析

Analysis of Parameters Affecting the Midspan Deformation of Continuous Rigid Frame Bridge

连续刚构箱梁桥是我国桥梁工程中最常的用桥型结构型式之一,已建成的此类桥梁中普遍出现了跨中下挠过大.影响连续刚构桥跨中下挠因素较多并且复杂.归纳了影响连续刚构挠度的主要参数.以白果渡连续刚构桥为背景,分析各种参数对连续刚构下挠的影响,在此基础上提出防治措施.

Continuous rigid frame bridge with box section is one of the most popular structure types in the bridge construction in China. Big widespread deformationin often appears in midspan of the brigdes. Factors affecting deformation of the midspan of continues rigid frame bridge are plentiful and complex. The key factors affecting continuous rigid frame bridge midspan deformation were analyzed and summarized. By the basis of a continuous rigid frame structure--Baiguodu Bridge ,various parameter affecting continues rigid frame bridge deformation were analyzed. The prevention and cure measures on this foundation are put forward.