考虑弹性模量修正的特大跨悬臂浇筑拱桥施工阶段力学性能分析

Analysis of mechanical performance on cantilever pouring arch bridge with extra-large span in construction stage considering elastic modulus modification

通过建立某悬臂浇筑拱桥有限元模型,根据实测数据对设计弹性模量进行修正,对比分析修正前后索力、节段线形及截面应力的变化规律。计算结果表明:弹性模量变化对3者均有一定影响,对索力及截面应力影响有限,但对线形影响较为明显,修正前后最大变化幅度达70.6%。

By establishing a finite element model of a cantilever pouring arch bridge,according to the measured data,the design of elastic modulus is modified,and the change law of cable force,section linear and section stress before and after correction are compared,analyzed and modified. The results show that all changes in the elastic modulus have a certain effect on the above three,a limited effect on the cable force and section stress,but a relatively obvious effect on the linear with a maximum change of 70.6% before and after correction.