考虑自生体积变形计算混凝土的温度应力

Concrete temperature stress analysis in consideration of itsself growing volume deformation

在水利水电工程建设的结构设计中，以往计算混凝土结构的温度应力不考虑混凝土自生体积变形，这将产生的较大误差，尤其是计算补偿收缩混凝土结构的温度应力时误差更为显著。为消除这种误差，我们提出了一种处理混凝土自生体积变形的温度应力计算方法。其原理是把混凝土的自生体积变形换算成等效温差，然后把这一等效温差同实际温差相叠加，再按一般的方法进行温度应力计算。已用该法计算了一些工程实例，所得结果与原型观测结果颇为一致。

The concrete self growing volume deformation was not considered in temperature stress analysis for concrete structure in the past. It causes considerable errors, which is especially significant in temperature stress amalysis for contraction compensated concrete structure. Hence we suggested a temperature stress computation method dealing with concrete self growing volume deformation. The principle of the method is substituting equivalent temperature difference for concrete self growing volume deformation, and adding it to the actual temperature difference, then computing the temperature stress by ordinary method. This computation method has been applied in some practical projects, the obtained results satisfactorily meet the observation results on the prototype.