混凝土无背索部分斜拉桥主梁温度梯度函数选择的合理性分析

The Rationality Analysis of the Choice of Main Beam Temperature Gradient Function for Concrete Cable-stayed Bridges without Back Cable

针对我国桥梁设计规范中采用统一温度梯度函数的特点,介绍了温度应力的计算方法,并结合世界上最常用的几个国家桥梁设计规范中温度梯度函数形式,对主梁上下缘不同部位,以及斜拉索受力状态的影响的差异性,最后对我国一条温度曲线推广全国模式的合理性进行了探讨,可为我国不同地区气候条件下的类似工程设计提供参考。

For the characteristics of uniform temperature gradient function that adopted in the bridge design specification in China, this paper introduced the calculation method of temperature stress. Combined with the temperature gradient functional form most commonly used in several countries in the world bridge design specification, it introduced the different parts of the main beam upper and lower edge, the influence difference of the stay cable force state. It also discussed the rationality of a temperature curve to promote the national pattern,which provided some reference for the similar engineering design under the different regional climate condition in China.