Análise da estabilidade global de um edifício variando o sistema de contraventamento para a cidade de Palmas

Abstract

From the population growth of the capital Palmas-TO, the demand for increasingly taller and slender buildings in tourist spots in the Master Plan follows this process. To enable the construction of these multi-storey and slender buildings, the analysis of global stability becomes essential. The overall stability of the building is provided by the bracing system, which can be presented in different ways. For the present study, 3 (three) bracing systems were modeled for the same floor plan of a 25-story building with a total height of 74.80 m, in the TQS Info V22 software, in order to verify which system provides better performance, evaluating the overall stability and the consumption of inputs. The model building was launched in the software with their respective bracing systems, namely bracing frames, wall columns associated with bracing frames and wall columns associated with rigid core, designated Models A, B and C, respectively. The results obtained from the processing of the models were presented and compared in order to verify which bracing system provides better performance, analyzing global stability, displacements at the top, between floors and consumption of inputs. The results show that only bracing frames do not provide sufficient stiffness for this building, in Models B and C, the use of wall-pillars and rigid core validated their use, providing overall stiffness. Concrete consumption and formwork area between the models that meet the global stability, Model B and C, showed similar values. Steel consumption, a relevant weighting factor in the construction budget, showed an increase from Model B to C, therefore, Model B presented stability within the normative parameters and lower steel consumption.