Estudio de las conexiones soldadas de columnas compuestas RCFT con vigas metálicas tipo I comúnmente usadas en Ecuador

Abstract

In our midst in recent years has seen a boom in the construction of steel buildings, several of these do not have properly qualified or proven connections, arising the imperative need to investigate this topic to be more certain about the actual behavior of these connections, this research topic has compared the behavior of five welded test specimens, which are used with composite columns RCFT (Rectangular Concrete Filled Tube) and Type I Metal Beams all made with the same materials, dimensions and constructive processes, varying only the part of the connection being the only variable to investigate. For this investigation, four same specimens were made and compared with the specimen made by (Ing. Hugo Pillajo). These experimental tests determined the actual behavior of these connections by conducting a cyclic test following the load protocol defined by (ANSI/AISC 341-10, 2012) which states that for a connection to be qualified it must withstand a bending moment on the face of the column greater than 80% of the plastification moment of the beam in its reduced section, for a total rotation of 0.04 radians to qualify as a Connection Fully Restrained (FR), and 0.02 radians to qualify as Partially Restrained (PR), from the results of the experimental tests we obtained the hysteresis curves necessary to carry out our study.