日照温差对圬工拱桥应力的影响模拟分析

Impact of Air Temperature Difference on the Internal Forces of the Masonry Arch Bridge

日照温差对桥梁结构的内力有重大影响。对圬工拱桥主拱圈进行空间有限元分析,通过对主拱圈施加局部温度作用,计算和比较结构在温度梯度和局部整体升温的状态下的应力分布特征,得出相应规律,并解释部分拱圈病害的形成机理,为今后相关桥梁的设计养护提供一定参考。

The sunshine and air temperature difference has a significant impact on the internal forces of the bridge structure. The spatial finite element analysis on the main arch masonry arch bridge was conducted by applying the local temperature to the main arch. Through the calculation and comparison of the stress distribution characteristics of the structures under the conditions of the temperature gradient and the local overall warming state, based on the corresponding changing law, the forming mechanism of the arch ring disease was explained, which may provide a reference for bridge design and conservation