Análise da redistribuição dos esforços em elementos estruturais de um edifício de múltiplos pavimentos mediante a possibilidade da ocorrência de colapso progressivo

Abstract

Progressive collapse is a phenomenon of structural failure that occurs through the propagation of an initial failure in the structure that can be produced by various types of errors, either during the design, construction or use of the building. The initial failure of a structural element propagates to the other structural elements, which are consequently overloaded, which may or may not result in the collapse of all or a large part of the structure. The occurrence of the first cases aroused the need for studies in other countries, which, as a result of this initial advance, developed measures to prevent progressive collapse based on their regulatory standards. In Brazil, this topic began to be studied after the first cases of occurrence, which consequently resulted in a topic that lacks consistent normative information. In this work, a brief introduction about the progressive collapse phenomenon was carried out, exposing the existing types, the main causes and possible measures for prevention. Subsequently, through the structural modeling software in partnership with the company TQS, a fictitious 20- story building was modeled and some analyzes were carried out through the removal of predetermined pillars, which resulted in different behavior of the other structural elements such as pillars and beams. In the study it was possible to observe a standard redistribution of stresses when subjected to high stresses arising from the removal of predefined support elements, as well as the possibility of the phenomenon occurring in the examples discussed.