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对二滩水电站钢蜗壳与外围混凝土联合承载， 运用有限单元法进行了三维有限元分析。采用第三类温度边界条件 （对流换热边界）， 计算了温度荷载对混凝土应力的影响。并按照实际情况考虑了围岩弹性约束力， 得到了混凝土的应力分布情况， 根据计算结果讨论了混凝土中设置钢筋的合理模式。
The steel spiral case of the Ertan Hydropower Station and its surrounding concrete are jointly supported by finite element method and analyzed by 3D finite element method. Using the third type of temperature boundary conditions (convective heat transfer boundary), the effect of temperature load on concrete stress was calculated. According to the actual situation, the elastic constraint of surrounding rock is taken into account and the stress distribution of concrete is obtained. Based on the calculation results, the reasonable mode of setting reinforcement in concrete is discussed.