龙滩碾压混凝土坝温度场仿真计算

The Simulation Computation of Temperature Field of Longtan RCC Dam

采用有限元法与有差分法相结合 ,在空间域用有限元离散 ,在时间域用差分法离散 ,编制了计算碾压混凝土坝温度场的仿真计算程序 ,并对龙滩碾压混凝土坝进行了 5 0年的仿真计算 ,得出如下结论 :①由于碾压混凝土坝采用薄层浇筑方式 ,使得坝体内最高温度场受外界气温影响较大 ,随着外界气温的升降而升降。②碾压混凝土坝前期温度梯度高 ,降温速度快 ,后期降温慢 。

With the combination of finite elements and finite difference methods,i.e. space dispersion by finite element method and time dispersion by difference method,a simulation computation program is made to compute the temperature field in concerete dam and a 50 year simulation computation for Longtan RCC dam has been carried out.The conclusion is:(1)Thin layers of RCC placement are apt to be affected by surrounding temperature,and the max. temperature field rises and drops according to the ambient temperature.(2) The RCC dam has a higher temperature gradient in the initial stage and its temperature drop speed is quick in the initial stage,slow in the latter stage.The final stable temperature field will be reached in tens of years.