Fachadas de pele de vidro: análise da influência do seu peso no dimensionamento estrutural das edificações

Abstract

Increasingly, architectural projects have been proposing the use of glass facades in buildings, but their concept does not always remain the same throughout the execution of the works. The objective of this study was to structurally compare the impacts of the weight of different glass curtain wall layouts applied to a previously defined building. For this purpose, two facade layout models were developed for the same base building, taking into account the prescriptions of ABNT NBR 6118 (2023) and other relevant standards for building assessment. The model under study was developed in the TQS software and processed to present data on structural forces and material quantities. For the facade simulations, the appropriate technical standards were used for the correct evaluation of the material set. Technical catalogs from glass curtain wall system suppliers were also extensively explored in this study, and the necessary structural calculations were carried out to ensure that the proposed facade configurations were feasible. The results obtained from this study show that there are differences in the structural forces, and consequently in the need for reinforcement, depending on the specific layout adopted for glass facades. This leads to the conclusion that preliminary sizing of the glass curtain wall is essential before finalizing the structural design for construction. This approach helps to avoid undersizing, which could compromise the structure's integrity, or oversizing, unnecessarily increasing costs. [resumo fornecido pelo autor]