大坝防渗层新浇筑砼的水化热温度应力分析

Temperature Stress Analysis of Hydrate Heat of Underwater-Indiscrete Concrete in Proof-leakage Layer of Dam

在对大坝坝段进行温度场及温度应力的有限元分析基础上 ,采用向后差分法推导了求解瞬态温度场有限元基本方程 ,编制了计算程序进行计算 .着重对防渗层浇筑过程中因混凝土水化热产生的温度应力进行了研究 ,其中考虑了自生体积膨胀、应力徐变的影响 ,得出了对工程指导有益的结论 .

Based on the result of finite element analysis of temperature field in the dam and back difference method,the basic finite element equations of temperature field are established and the computing program is compiled.It emphasizes the study of temperature stress induced by hydration heat during underwater indiscrete concrete pouring into the proof seepage layer of the dam.It also includes the influence of self volume expanding and stress varied with time.A helpful conclusion for engineering is obtained.