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针对混凝土高坝温度应力仿真分析中计算时间过长的问题,提出了三分区算法——新混凝土区、过渡区和老混凝土区,在新混凝土区采用小的时间步长,在过渡区和老混凝土区采用比较大的时间步长。通过有限元仿真分析,研究了坝体新混凝土区温度变化对老混凝土中变形的影响,提出了影响深度系数的计算公式,解决了三分区算法中合理分区的关键问题。三分区算法既可以节省大量计算机时,又能够保证计算误差小。
Aiming at the problem of too long calculation time in the simulation analysis of temperature stress of concrete high dam, a three-zone algorithm - new concrete zone, transition zone and old concrete zone is proposed. In the new concrete zone, a small time step is adopted, Concrete area using a relatively large time step. Through the finite element simulation analysis, the effect of the temperature change of the new concrete in the dam on the deformation of the old concrete was studied. The calculation formula of the influence depth factor was proposed and the key problem of the rational partition in the three-zone algorithm was solved. Three partition algorithm can save a large number of computers, but also to ensure that the calculation error is small.