Análise da estabilidade global de edifícios de concreto armado: consideração dos efeitos das alvenarias participantes

Abstract

The present work consists in evaluating the global stability of a reinforced concrete building with multiple floors, considering the masonry participating in its bracing system. For this, the requirements of the standard ABNT NBR 16868-1 (2020) and the bibliographies consulted for the development of this project were applied. Initially, the widths of the equivalent diagonals were determined based on the standard design and on the expression developed by Mainstone (1974) for the purpose of comparing the methods and adopting a single width. The analyzed models were dimensioned using two different block typologies, ceramic block and concrete block, in order to assess the changes that each situation presented. The analysis of global stability was performed using the FTOOL software. As adopted methodology, three gantry models with different characteristics were proposed, one of them considering only the reinforced concrete frame resisting horizontal actions, the second considering the masonry participating in ceramic blocks and finally the masonry participating in concrete blocks. The development of this comprises the steps of bibliographic review, methodology, simulation of the proposed models and analysis of results. The result of this study confirmed that the determination of the equivalent diagonal width based on the ABNT NBR 16868-1 (2020) standard provides an applicable width capable of absorbing normal diagonal efforts. Finally, it is concluded that participating masonry contributes to the reduction of displacements of the structure, making it more rigid in face of horizontal actions. [resumo fornecido pelo autor]