大型渡槽温度应力仿真研究

Temperature Stress Simulation Study on Large Aqueduct

用化学反应速率描述温度对混凝土绝热温升的影响,求解基于等效时间的非线性热传导方程,对南水北调工程某渡槽施工期温度场和徐变应力场进行了仿真计算。研究表明,对于夏季和冬季浇筑的混凝土,采用基于等效时间的混凝土绝热温升理论和传统理论的计算结果有较大差异。

Chemical reaction rate is used to interpret the influence of temperature on adiabatic temperature rise of concrete, equivalent time-based nonlinear heat conduction equation is solved, and simulation calculation is done for temperature field and creep stress field of a certain aqueduct in the construction of the South-to-North Water Diversion Project. Study shows that calculation results obtained from equivalent time-based concrete adiabatic temperature rise theory and traditional theory for concrete placement in the summer and in the winter are different.