Bond-Slip Behavior of Reinforced UHPC Under Flexure: Experiments and Prediction

Presented By: Yi Shao, McGill University Description: T Ultra-high performance concrete (UHPC) is an advanced class of concrete materials that show superior mechanical and durability performance. While several studies have investigated the bond-slip behavior of steel reinforced UHPC using traditional pullout tests, very limited information is available on the bond-slip behavior of reinforced UHPC from beam-type tests, which produce flexural stress states commonly seen in structural members. We will first present a large-scale experimental program that investigates the bond-slip behavior of reinforced UHPC using beam-end specimens. Test variables include fiber volumes (0%, 1%, 2%), bar diameter (16mm to 32 mm), cover thickness (16mm to 51mm), and loading types (monotonic versus reversed cyclic). Afterwards, we will introduce a recently-developed model that can predict the bond-slip behavior of reinforced UHPC under monotonic or cyclic loadings.