In this dissertation, a three-dimensional finite element program for thermal and thermal stress analysis of hydration heat in concrete structures with pipe cooling system was developed. A line element was adopted for modeling of pipe. Internal flow theory was applied for calculating the temperature variation of cooling water.
The developed programs are found to highly sensitive to the mesh size on the convection boundary surface of atmosphere and the numbers of mesh division on the convection boundary surface of atmosphere and cooling water.
From the comparison between the predicted and measured results in the spread footing with pipe cooling system, the developed three-dimensional finite element program effectively predicts the temperature history of concrete. And the temperature variation of cooling water is efficiently obtained by introducing internal flow theory and line element.
It is possible to apply the developed program to thermal analysis of hydration heat with pipe cooling system regardless of the pipe layout, the cooling water velocity and inlet temperature, and the thermal properties of concrete and cooling pipe.
