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应用有限元方法分析了某大型水电站地下厂房中蜗壳结构的温度场和温度应力 ,阐述了围岩弹性抗力系数的确定方法 ,得出了混凝土截面的切向正应力 .计算分别采用第一类 (已知温度的边界 )和第三类 (对流换热边界 )温度边界条件 ,并对两种边界条件下的温度场和温度应力进行了比较 ,根据计算结果讨论了温度应力对蜗壳外围混凝土结构的配筋影响
The finite element method is used to analyze the temperature field and temperature stress of the volute structure in the underground powerhouse of a large hydropower station, and the method to determine the elastic resistance coefficient of the surrounding rock is expounded. The tangential normal stress of the concrete section is obtained. (Known temperature boundary) and the third type (convection heat transfer boundary) temperature boundary conditions, and the temperature field and temperature stress under the two boundary conditions were compared. According to the calculation results, the temperature stress on the volute perimeter concrete Reinforcement of the structure