Experimental and Analytical Investigation of Bond Behavior of Deformed Steel Bar and Ultra-High Performance Concrete

Ultra-high performance concrete (UHPC) has been demonstrated to be a realistic alternative less maintenance and significantly longer service life due its better mechanical properties low permeability. The bond of the deformed steel bar embedded in UHPC is critically important for safety structures. This paper conducted an experimental investigation on behavior bars UHPC. impacts loading method, strength, fiber type content, rebar diameter, cover thickness were studied. testing results revealed that specimens failed three modes: pull-out, splitting + cone failure. main factors affecting strength are compressive thickness, characteristics. peak slip rebar-UHPC increases with diameter. Finally, analytical model stress-slip relationship between obtained, which suitable agreement test results.