混凝土徐变对坝体温度应力场的影响

用有限单元法研究徐变对大体积混凝土结构温度应力的影响，对混凝土结构的温度应力进行 了仿真计算。计算结果表明，徐变度越大，温度应力越小，二者近似服从二次函数关系。徐变对温度应 力场的影响作用受水管冷却措施的影响较大，当水管冷却时间较长或水化热发热速率较快时，徐变对温 度应力的影响作用明显减小。

The Impacts of Concrete Creep on Its Thermal Stress Field

By adopting finite element method ,we study the variation of concrete temperature stress caused by creep .By simulations of temperature stress ,we find that the more the creep increases ,the less temperature decreases ,which nearly follows the quadratic function .In addition ,when take cooling pipes into account ,it changes a lot .While use water pipe cooling for a long time and the speed of hydration heat increase quickly ,the effect can reduce a lot .