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本文对拱坝温度应力的几个主要问题进行了研究。全文分为三部分,第一部分研究拱坝瞬时弹性温度应力的计算问题,建议把伯努里-纳维埃关于断面在变形后保持为平面的假定与试荷载法相结合来解决拱坝温度应力的空间问题,并提供了计算公式和图表,以便利计算。对厚拱坝的应力分析提出了一个简捷的近似处理方法。对温度折算成静水压力计算的方法进行了评述,指出了它的缺点。第二部分研究混凝土徐变对拱坝温度应力的影响,我们引用马斯洛夫教授关于混凝土徐变的积分方程来分析外界温度按简谐变化时的温度应力问题,得到了一个方便的计算公式。第三部分研究拱坝灌缝时的过度冷却对降低温度应力的效果问题,也建议了一个计算方法。
In this paper, several major problems of arch dam thermal stress are studied. The full text is divided into three parts. In the first part, the calculation of instantaneous elastic temperature stress of arch dam is studied. It is suggested to combine the Bernoulli-Navier method on the assumption that the cross-section remains flat after deformation and the test load method to solve the temperature stress of arch dam Space issues, and provides calculation formulas and charts to facilitate the calculation. The stress analysis of thick arch dam proposed a simple and approximate approach. The method of calculating the hydrostatic pressure converted to temperature is reviewed, and its disadvantages are pointed out. In the second part, we study the effect of concrete creep on the temperature stress of arch dam. By referring to the integral equation of Professor Maslov’s concrete creep, we analyze the temperature stress problem when the external temperature changes according to simple harmonic, and get a convenient formula . The third part also studies a calculation method to study the effect of over-cooling during arch-filling of arch dam to reduce temperature stress.