Estudio experimental de columnas rectangulares compuestas no compactas con atiesadores intermedios, sometidos a carga axial

Abstract

Structures with composite members combine materials such as structural steel and concrete, reduce instability of compressed steel, and improve the low tensile strength of concrete. In the non-compacted composite sections, the yield stress is reached in some, but not in all the elements in compression, therefore, a reduction in its effective area is generated which causes the reduction of its capacity, being able to present the phenomenon of buckling local prior to plastification. One way that the elements work as compact is to decrease their width through the use of rigidity stiffeners, which are elements fixed on the member to prevent buckling. This study was based on the test of rectangular columns filled with concrete. Through a hysteretic axial loading process, the experimental capacity of the test specimens was obtained, there was an increase in the effective area of the sections with intermediate stiffeners and their behavior resembles that of the members with compact elements, thus checking the efficiency of the use of these stiffeners in the reduction of the width-thickness ratio and its usefulness in construction.