大体积混凝土承台温度和应力场的三维数值模拟

3-D Numerical Simulation on the Temperature and Stress Field of Some Large Bulky Concrete Cofferdam

应用三维有限元分析手段,对某承台大体积混凝土浇注过程中温度场和应力场的发展规律进行了三维数值研究。对比分析了采用自然冷却和通水冷却方案时承台混凝土浇注过程中温度场的发展过程,并计算了通水冷却时由混凝土温度梯度所诱发的应力场。研究结果表明,该承台大体积混凝土施工过程中的温控措施在理论上是可行的。

The temperature and stress field of some large bulky concrete cofferdam was numerically simulated by using the 3-D FEM. The temperature field development of the water cooling scheme was compared with the natural cooling scheme, and the stress field induced by the heat of hydration was computed. The obtained results indicate that the temperature control scheme of the cofferdam concrete construction is feasibly in theory