An analytical model is proposed in the present paper aimed at describing the response of sim- ply- supported beams loaded in four-point bending. Several cases concerning normal- and high-strength con- crete beams, reinforced with longitudinal bars, stirrups and steel hooked…
An analytical model is proposed in the present paper aimed at describing the response of sim- ply- supported beams loaded in four-point bending. Several cases concerning normal- and high-strength con- crete beams, reinforced with longitudinal bars, stirrups and steel hooked fibers are considered, and their load- deflection curves, as well as their moment-curvature curves and the ultimate deflections at the onset of fail- ure in bending or shear, are obtained by means of the proposed, simplified approach. The satisfactory fitting of the test results confirms the potential of the proposed model, that can accurately predict beam behaviour in bending and shear, including the spalling of the cover and the contribution of the fibers.