Numerical Analysis of Temperature Stress Generated by Hydration Heat in Massive Concrete Pier

Abstract

Thermal crack induced by the hydration heat of massive concrete is the main problem that needs to be strictly controlled during the pouring process of concrete. In this study, the hydration heat of massive concrete pier and its influencing factors are studied numerically. The stress of massive concrete pier caused by the hydration heat of concrete is analytically derived. The influences of adiabatic temperature rise, ambient temperature and convection coefficient between the pier outer surface and environment on the temperature and stress of pier are studied. The results show that the peak values of temperature and stress of the pier increase with the increase of the maximum adiabatic temperature rise, the reaction rate coefficient and the ambient temperature. The peak value of stress reduces with the decrease of convection coefficient because the heat dissipation and the temperature change on the cross-section of the pier are reduced.