| In the early stages of erected concrete structures, temperature rise occurs due to hydration of cement. Two theoretical models, namely, a transient thermal model and a transient stress model are developed to predict the behaviour of young concrete. The models account for several factors such as arbitrary concrete block pour history, convective heat exchange between concrete and air, and a variable modulus of elasticity.;First, a model of concrete test specimens prepared as part of this research program was used to investigate what ultimately drives the potential for failure. Subsequently, the specimen size is enlarged and the size effect is captured. In addition, the pour time effect is analyzed.;Finally, a model, which presents an actual dam's upper structure (two blocks), is analyzed. The numerical analysis is carried out using commercial software, which uses the finite element method revealed the magnitude and the internal residual stress distribution. (Abstract shortened by UMI.)... |
