Ductility of High Strength Concrete Heavily Steel Reinforced Members.

The nature of high strength concrete, hsc, is brittle failure and although the behavior of reinforced concrete beams heavily steel reinforced are increased in strength, the ductility, which is important in seismic regions, is in question. in other words, such beams, while consisting of hsc, are more brittle. in this paper, the exural ductility of such members, with a variation in compressive reinforcement, is investigated. six heavily reinforced high strength concrete, hsc, beams, with different percentages of (rho) and (rho)', were cast and incrementally loaded under bending. during the test, the strain on the concrete middle face and on the tension and compression bars as well as the de ection at different points of the span length were measured up to failure. based on the results obtained, the curvature, displacement and rotation ductility of the hsc members are more deeply reviewed. a comparison between theoretical and experimental results are also reported here. generally, it was concluded that for heavily steel reinforced hsc beams, the displacement ductility for singly reinforced beams is too close to the doubly reinforced beams.