大体积混凝土湿热耦合研究

Research on Coupled Heat and Moisture Transfer of Mass Concrete

从传热传湿的机理出发,结合水工混凝土特点,建立了以温度和含水量为基本变量,含内热源和内湿源的大坝混凝土湿热耦合传导模型,实现了基于交替变量的伽辽金(Galerkin)法的混凝土湿热传导耦合模型的有限元求解.该方法可用于大坝混凝土湿热耦合传导过程的仿真计算与分析,为混凝土坝采用保温保湿的方式来防止混凝土裂缝提供科学依据.

In this study, a theory of coupled heat and moisture transfer which use temperature and water con-tent as the basic variables is introduced to moisture concrete structures. Meanwhile, both heat source and moisture sources are taken into account in the theory to meet with the mass concrete. A new way named alter-native variable Galerkin method is presented to solve coupled heat and moisture problem. This model could be applied to the simulation analysis of concrete dam so that adaptable engineering measure could be taken to pre-vent concrete cracksing.