Influencia de las propiedades mecánicas del acero de alta resistencia en el comportamiento de muros de concreto

The behavior of reinforced concrete walls with high-strength steel (yield strength greater than or equal to 550 MPa [80 ksi]) is evaluated. The influence of yield stress (fy) and the tensile-to-yield strength (ft/fy) are analyzed by means of tests on T-shaped concrete walls. Additionally, the effects of uniform elongation (Esu) and fracture elongation (Esf) are evaluated. Two walls reinforced with Grade 690 or 830 steel (100 or 120) (fy = 690 or 830 MPa [100 or 120 ksi]) and with concrete strength of 55 MPa (8 ksi). Test results were compared with previous tests to validate changes in the Concrete Design Code (ACI 318). The data obtained suggest that walls with high-strength steel have a deformation capacity similar to walls reinforced with conventional steel (fy = 420 MPa [60 ksi]). However, the steel must satisfy ft/fy≥1.2,Esu≤6%yEsf≥10% for the walls to exhibit satisfactory behavior. ILIA: Investigaciones Latinoamericanas en Ingeniería y Arquitectura, No. 01, 2024: 91-99.