Comportamiento a tracción de barras de acero de refuerzo en hormigón comercializadas en Quito y su influencia en el momento probable en vigas y nodos para el diseño por cortante

Abstract

In the shear design of horizontal elements resistant to moment, it is of utmost importance the calculation of the probable moment applying the design philosophy by capacity since in the procedure the reinforcing steel placed is considered. This is why it is imperative to research mechanical properties and laboratory experimentation by tensile testing the material used as reinforcing steel. The ACI 318-19 standard recommends the use of a tensile hardening factor α=1.25. The present research try to verify if in our environment using alpha equal to 1.25 is conservative or not very conservative during the design. For this, a campaign of tests in the laboratory has been proposed to analyze the Alpha factor of commercial rods in our environment. This factor is introduced in the design of 20 reinforced concrete buildings in order to study its effect. The results show that most diameters provide a lower than recommended Alpha value. However, there is no evidence of a considerable variation for the calculation of the transverse reinforcement required in a beam.