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MECSOL 2019
7th International Symposium on Solid Mechanics
Collapse of I-Section Tapered Beam-Columns in Medium-Span Steel Frames: Finite Element Model Validation
Submission Author:
Ernesto Massaroppi Junior , SP , Brazil
Co-Authors:
Ernesto Massaroppi Junior, Miguel Abambres, Tiago Ribeiro
Presenter: Ernesto Massaroppi Junior
doi://10.26678/ABCM.MECSOL2019.MSL19-0171
Abstract
Tapered steel beams and columns have been increasingly used as primary load carrying members. The determination of their accurate ultimate capacity can only be achieved by means of advanced numerical methods such as the finite element method (FEM). This paper presents a systematic study on the influence of FE model parameters on the ultimate load of I-section tapered beam-columns typically used in medium-span steel frames. It aims the determination of optimal sub-step number (to be used during the arc-length scheme) and FE mesh size for the performance of an accurate, robust and efficient inelastic post-buckling parametric analysis (PA). This is part of an ongoing investigation aimed to use PA results to develop analytical predictive models of buckling and collapse loads of this type of members, using artificial neural networks. Once validated the FE model, using hexahedral 8-node finite elements, 3 sub-steps and FE edge sizes of 20, 25 and 30 mm have been selected for use in the future PA.
Keywords
FEM, inelastic post-buckling collapse, mesh quality, steel beam-column, tapered member
