混凝土桥梁温度应力的简化计算

SIMPLIFIED CALCULATION OF TEMPERATURE STRESS OF CONCRETE BRIDGE

竖向温度梯度应力计算是桥梁结构设计中重要的一部分,特别是对于混凝土箱梁桥,温度应力可以达到甚至超过活荷载应力。针对此问题,首先探讨了现有竖向温度梯度应力的计算方法,分析了其原理以及适用性,然后基于分析成果,对计算方法开展了优化研究,针对基于结构力学的解析法计算复杂且适用性差的问题,编写了适用于任意截面的温度应力的计算程序。

The calculation of vertical temperature gradient stress is an important part of bridge structure design, especially for concrete box girder bridge, the temperature stress can reach or even exceed the live load stress.To solve this problem, the paper first discusses the existing calculation methods of vertical temperature gradient stress, analyzes its principle and applicability, and then carries out optimization research on the calculation method based on the analysis results, and compiles the calculation program of temperature stress suitable for any section.