Experimental investigation on dynamic behavior of concrete after exposure to elevated temperatures

This article deals with the dynamic behaviors of concrete after exposure to elevated temperatures using a split-Hopkinson pressure bar (SHPB) test set-up. Forty-nine concrete cylinders are experimentally investigated under different impact velocity after applied with different temperatures. A number of complementary static tests for concrete heated with different temperatures are also examined. The static and dynamic stress-strain relationships of all the concrete cylinders are recorded and compared. Further discussion then focuses on investigating the effect of the high temperature and strain rate, as well as the combined effect of both conditions on the concrete properties. Furthermore, a formula of temperature and strain-rate influencing factor is also proposed to predict the concrete compressive strength subjected to the combined effect of temperature and strain-rate.