Fatigue Performance of Rib Beam Bridge Slabs Reinforced with Polyurethane Concrete Based on the Damage Theory

In this paper, the rib beam bridge slabs were taken as research object. Static load and fatigue tests carried out on benchmark to determine ultimate capacity life of slabs. Then, slab was pre-damaged reinforced with polyurethane concrete. A test study performance. Based damage theory, reinforcement finite element models under different degrees established. The performance systematically studied. results show that developed in stages. Compared unreinforced slab, significantly reduced at each stage. According least square method numerical analysis results, a residual-bearing-capacity model including degree cycles is proposed, which can be used reference design.