Parametric Investigation on Structural Behavior of Steel Fiber Reinforced Concrete Corbels An improved strut-and-tie model to predict the ultimate strength of steel fiber-reinforced concrete corbels Constitutive models for nonlinear analysis of SFRC corbels Experimental and analytical investigation of high performance concrete beams reinforced with hybrid bars and polyvinyl alcohol fibers Experimental flexural performance of concrete beams reinforced with an innovative hybrid bars