Finite difference method analysis of 3D unsteady temperature field in mass concrete

摘要

Mass concrete generates internal heat during the hydration period after casting. Added to these internal heat changes are the environmental conditions that the structure is subjected to during its design life. In the article, the math model of 3D unsteady temperature field is established according to the theory of thermal conduction, the finite time and finite point's temperature value is attained with the disruption method of high-dimension finite difference element. The results show the temperature variation regularity of mass concrete can be accurately expressed. This method has the great theory value for cracking control in mass concrete.