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根据沙牌工程混凝土徐变试验资料 ,按混凝土固化徐变理论 ,分解了沙牌碾压混凝土徐变度函数 ,得到了沙牌混凝土粘弹性相变形、粘性相变形的数学表达式 ,提出了混凝土的非线性徐变应力计算方法 ;根据沙牌碾压混凝土拱坝的材料参数与环境参数 ,模拟了混凝土的施工过程 ,得到了沙牌碾压混凝土拱坝的三维温度场与三维应力场的仿真计算成果 ;比较了混凝土线性徐变应力理论与非线性徐变应力理论下拱冠剖面不同高程、不同部位大坝混凝土应力随时间的变化过程 ,得出了一些有意义的结论 ,可供大坝温控设计参考 .
According to the concrete creep test data of Shapai Engineering and according to the theory of solidification and creep of concrete, the creep function of Shapai RCC is decomposed, and the mathematical expressions of viscoelastic deformation and viscous phase deformation of Shapai concrete are obtained. The concrete Based on the material parameters and environmental parameters of Shapai RCC arch dam, the construction process of concrete is simulated and the 3D temperature field and 3D stress field simulation of Shapai RCC arch dam are obtained The results of the calculation were compared. The stress curves of concrete with different crest elevation and stress at different positions under different linear creep stress theories and nonlinear creep stress theories were compared, and some meaningful conclusions were obtained for the dam Temperature control design reference.