Impact Resistance Of Ultra-High Performance Concrete

Abstract

This paper presents the cost effectiveness in design of concrete sturutes with high performance concrete. The testing program demonstrated that both types of panels could resist impact loads with energies up to 1900 J without complete failure. Both types of panels were not adversely affected by the extreme cold temperatures and in fact displayed increased effectiveness. The residual strength of UHPFRC panels was easily predicted based on the permanent midspan deflection caused by the impact test. The ambient temperature FRP strengthened SFRC panels had decreasing residual strengths as the amount of permanent deflection increased, while the cold temperature panels had the same residual strength despite having different amounts of permanent deflection. Both types of panels exhibited ductile behaviour, with the UHPFRC panels reaching maximum deflections of 100 mm and the FRP strengthened SFRC panels reaching maximum deflections of 120 mm.