Damage Assessment of Concrete in Thermal and Dynamic Loadings

Thisresearch aims tothe development of combined damage model of concrete material under impact and thermal loading conditions. Down-scaled experimental works were carried out for the quantitative evaluation of combined damage from impact and thermal loading. The experimental results of this research include measurement of weight loss of concrete, chemical composition analysis, and strength degradation after impact and fire exposure. The damage of concrete under high temperature and impact loading conditions was studied with experimental measurements. Weight loss of concrete specimen shows the range of 1 % to 8 % with three different levels of temperatures: 200℃, 500℃, and 800℃. At low and intermediate temperature levels, damage from impact loading was recovered and strength of concrete increased slightly after thermal loading. Rehydration might occur during the thermal loading. At high temperature level, damage of impact was combined with damage of thermal loading and strength of concrete decreased by 80 %.