Estudio comparativo técnico-económico de un edificio de estructura metálica con pórticos resistentes a momento con columnas de acero huecas y con columnas de acero compuestas rellenas de hormigón.

Abstract

The present comparative technical-economic study It is carried out with the purpose of analyzing the contribution that composite columns have within a structural system formed of moment resistant frames and checking the advantages they can offer compared to other types of elements according to the theoretical basis investigated, for this it is proposes the modeling of two cast metal structures, one with rectangular hollow steel columns (Hollow Structural Section, HSS) and the other with rectangular columns filled with concrete (Concrete Filled Steel Tube, CFST). The compared structures that have the same architectural configuration intended for residential and office use, each with 5 floors and subjected to the same load requirements, are obtained through a predimensioning carried out in accordance with the guidelines of the corresponding regulations according to the type of elements (steel elements, composite elements), to later be analyzed by means of a static and dynamic seismic analysis through computational software, in order to evaluate the structural behavior of each one before gravitational loads and seismic forces, particularly emphasizing in the differences that could exist in the behavior of the CFST and HSS columns, which are the main object of the study. Additionally, the increase of an additional floor to the structure with rectangular steel columns filled with concrete is considered, in order to establish a height at which the system made up of moment-resistant frames continues to present advantages over other structural systems. Finally, it is intended to carry out a comparative economic analysis, between a structure with CFST columns and another with HSS columns, which present the best structural behavior, through which the costs of each model will be known, which will allow defining which is the alternative that It presents a better cost-benefit relation for the construction industry in Ecuador.