Analysis of Global Stability in Reinforced Concrete Building with Flat Slabs: Case Study

Abstract

The knowledge focused on the area of structural engineering is growing with regard to architectures that pose great challenges when it comes to idealizing a structural project. Thus, the stability analysis of a structural system is performed by knowing the material properties and the elements that make up the structural arrangement as a whole. In this work, the material used will be reinforced concrete and the structural system formed by collumns and flat slabs. Thus, the purpose of the work is to contribute to the understanding of the structural behavior of this type of structural system, since the flat slabs present a different configuration from conventional slabs, this is because they do not discharge the actions imposed on the beam elements, but rather directly on the pillars, which can generate greater instability for the structural system. In this sense, for a reinforced concrete building, with 8 floors, two methods of analysis were used, namely: spatial frame model and P-Delta process and the flat frame model with the associated flat frame method. Thus, It was sought results regarding the analysis of global stability, such as the first and second order moments, as well as the values of the coefficients , for the wind performance at 0° and 90°. The results achieved for the , coefficient were very similar for both methods, as it is a qualitative parameter. However, it is noteworthy that regarding the first and second order forces estimates, the obtained results demonstrate that the associated flat frame method is not conservative, and its use for project and design purposes of the studied structural system is not recommended, being indicated only for pre-designing cases.