Análisis del comportamiento ante cargas laterales de la unión soldada entre columna compuesta y viga de alma llena, reforzada con anillo rigidizante, en nudos interiores de pórticos resistentes a momento

Abstract

In our country there is an increase in constructions that use A-36 steel as the main material for their columns and beams, which make up a system of moment resistant frames. To analyze this type of system, the structure of a two-floor house was designed, considering the NEC-15 standard, the structural elements are composite by columns filled with concrete, and full-web steel beams, both made of ASTM A-36

structural steel. This research considers a comparison of the results between an experimental test and a theoretical model designed in ETABS and validated in SEISMOESTRUCT. For the experimental test, three specimens of the central portico of the house were built, on a real scale, which were tested under lateral load. The comparison was made at the most critical point, which is the central node of the first high floor; analyzing the results between the frames with different reinforcements: simple welded joint (frame 1), welded joint with rectangular stiffening ring (frame 2) and welded joint with trapezoidal stiffening ring (frame 3); the best result regarding the load capacity of the portico obtained is presented when using the trapezoidal ring, where the experimental results closest to the theoretical results have been obtained.