Análise comparativa de estabilidade global em estruturas de concreto armado de múltiplos pavimentos com a utilização de lajes lisas e convencionais.

Abstract

With the growing verticalization process of civil construction, presenting more and more imposing and bold structures, it is necessary to analyze alternatives that meet the conditions of greater use of spaces. Traditionally, the most used constructive method is the conventional structural system that are formed by slabs, beams and columns; however, this model offers less space utilization conditions and higher costs. An option that is becoming increasingly popular is the use of flat slabs, which offer easier use of space and freedom of changes in the architectural layout, besides providing a reduction in reinforcement, concrete, formwork and execution time, due to the absence of beams. However, it has disadvantages regarding the global stability that decreases due to the lack of frames formed by columns and beams. Therefore, the objective of this work is to develop an analysis through the global stability parameters to study the feasible height for the use of the flat slab model, taking into consideration the comparison with the conventional structural method. For the study, a multifamily building was adopted and the equivalent frames method was used to launch the structural elements. The TQS software was used to develop the modeling and obtain the results. Based on the results obtained, the comparison showed that the conventional model presented better performance, through the analysis of the parameters used, they showed that the models launched with smooth slabs presented discrepant values.