Diseño sísmico de marcos especiales a momento compuestos (C-SMF) con columnas tubulares cuadradas de acero rellenas de hormigón (CFT) y vigas de perfil W aplicando la norma chilena NCH 433.

Abstract

In this research work, the seismic design of special composite frames (C-SMF) was carried out. To carry out this approach as a first point, the pre-design of the elements was carried out using the equivalent lateral force method (Bruneau, et al., 2011) for this structural system. After that, the design of several configurations of 2D prototype buildings of 3, 6, 8, 12 and 16 stories of height taken from a typical plant, located in different seismic zoning and soil type, was applied, applying the Chilean standard NCh 433 (INN, 1996). SAP2000 version 19.1.1 software was used to carry out all the research work. A total of 18 designs were carried out. The specifications for elements of the AISC 360 (ANSI, 2016) were achieved, with the seismic limitations of NCh 433 (INN, 1996) and the capacity design according to AISC 341 (ANSI, 2016) where the energy dissipation is concentrated at the ends of the beams and at the base of the columns of the first mezzanine emphasizing the verification of the seismic criterion of strong column-weak beam for C-SMF. The solicitation of the elements was much lower than their resistance, so the designs were completely controlled by the deformation limit imposed by NCh 433 (INN, 1996).