Método de auxílio na seleção de perfil metálico do tipo I laminado de acordo com a norma NBR8800:2008 de projeto de estruturas metálicas

Abstract

Metal beam are elements that guarantee resistance and lightness to the structures, be these of machines or of buildings. These have numerous advantages over existing structural elements, justified by the geometry of the section and the mechanical properties of the steels. The industrial sector presents several ways of using structures, a fact conferred during the curricular stage in the reliability engineering sector, where it was possible to observe that the structures are oversized, making an interest in the design of these structures important. The present work has the objective of developing a method for the selection of rolled I beam, through parameters indicated by the Brazilian Association of Technical Standards through the NBR 8800: 2008 standard. For this, an algorithm is created that traces the best profile choice by comparing the efficiency of all profiles and weights per linear meter, a factor that directly impacts the costbenefit of a mechanical design. In order to do so, it develops a computational routine with the geometric properties of the different sections present in the Gerdau profile catalog, the mechanical characteristics of the steel and the requesting project loads as well as its checks through the analytical calculations. After the construction of the profile selection method, the validation of this work was done through the application in a case study of the academic literature, which corroborated the choice of the beam using the proposed method.