Análisis comparativo económico estructural de la utilización de hormigón liviano (f’c=28mpa) vs hormigón normal (f’c=28mpa), usando acero de refuerzo convencional de grado 60 y de alta resistencia de grado 80 en un edificio de 5 pisos para la ciudad de Quito

Abstract

In this degree work, a comparative economic-structural analysis of the use of traditional concrete, lightweight concrete, grade 60 steel and grade 80 steel were carried out by modeling a 5-story building with a frame system without subfloors for residential use. The structure was placed in the capital city of Ecuador, Quito, under the following analysis proposals: traditional concrete - grade 60 steel, lightweight concrete - grade 60 steel, traditional concrete - grade 80 steel and lightweight concrete - grade 80 steel. The ACI 318-19 standard allows the use of high-strength steels, and establishes the considerations for the use of lightweight concrete. Adopting these guidelines along with the NEC-15, FEMA, ASCE-47 standards, the pre-design, modeling and structural analysis of the proposed proposals were done, taking into account a design according to a seismic-resistant philosophy. In addition, following the study by Morales et al. (2019), the characteristics of lightweight concrete to be used were proposed. The modeling of the buildings was elaborated with the help of structural software (ETABS), in the adopted models the following analyses were proposed: linear static, linear dynamic and nonlinear static (PUSHOVER). With the finalized analyses, the assembly, design, and definitive drawings were established. With the plans completed, the quantification of the material on site was performed for the economic analysis, based on the concept of unit prices