Análise de segunda ordem para dois sistemas estruturais de um edifício em concreto armado.

Abstract

The construction of increasingly taller and slender buildings is driven by several factors, including disordered population growth, scarcity of resources and the search for optimization of urban spaces. The consideration of displacements caused by horizontal and vertical loads has become crucial for the analysis of the global stability of buildings, as the effects generated by wind actions and geometric imperfections of the structure itself, end up becoming preponderant through the verticalization of the building and can compromise the full functioning of the structure when not considered. For this analysis, several methods, such as the P-Delta process and the FAVT coefficient, can be used to evaluate stability. The present work aims to compare the values generated by these methods in structural models with frames and wall columns. The results obtained were satisfactory, the maximum and minimum variations between the values of the coefficients were more significant for wind directions 90 and 270, presenting values around 4.34% to 25.91% in 90 and 4% to 23.49% in 270, and little significant for directions 0 and 180, varying between 1.36% and 9.24% in 0 and 0.87% to 2.74% in 180. This result suggests that the implementation of the system with wall pillars did not cause a significant impact under wind directions 0 and 180, identified as the direction of least demand for the structure.