Estudio experimental de la incidencia que tiene la geometría de las corrugas del acero de refuerzo en la ductilidad de vigas de hormigón armado

Abstract

The interaction between the concrete and the reinforcing steel is called adhesion and this subordinates the transfer of internal tensions between these materials, thus being able to change the performance of a structural member. The relative rib area adhesion factor "RR" summarizes the geometrical properties of each type of rebar. The geometry of the rib of the reinforcing rods are not constant, they depend on variables of the lamination, as well as the mechanical properties. To find the influence of the "RR" on reinforced concrete beams, a program of tests of two types of natural scale beams with different reinforcement, charged at point load in the center of the light and simply supported, is proposed. Through the measurement of the central deformation and the applied force, the graphs Moment vs. Curvature and Load vs. Deflection will be obtained to later evaluate the ductility. The design of the beams was under the guidelines of the Ecuadorian construction standard, in addition, to validate the data obtained in the tests of the beams, the control of the materials used was made: Concrete and Steel.