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Numerical analysis of cold-formed steel beams in fire
An investigation into the structural behavior of cold formed steel beams commonly used in warehouses and industrial buildings subjected to fire is presented in this paper A large series of numerical simulations performed with the finite element program ABAQUS were carried out and the results are discussed in this paper. Therefore, in the first phase of this research several experimental fire tests of cold-formed steel beams were undertaken to obtain the failure loads and failure modes of the beams, in other words, the results needed to validate the developed finite element model. The second phase of this research involved obvioush the development and validation of a suitable finite element model in order to simulate the structural response of the beams in fire and subjected to distortional buckling and lateral-torsional buckling effects. Finally, a parametric analvsis was carried out using the validated finite element model with the purpose to investigate numerically the effect of some parameters such as section geometry, initial applied load on the beam, span and magnitude of the initial geometric imperfections of the beams on their structural behavior. Some conclusions of this research study were that the hollow beams may have an increase of about 50% in the fire resistance, comparing to the open beams and that the initial geometric imperfections may cause a significant reducing in the critical temperature of the beams in function of the applied loading. They may even reduce by 20% the critical temperature of the beams.
Numerical analysis of cold-formed steel beams in fire
An investigation into the structural behavior of cold formed steel beams commonly used in warehouses and industrial buildings subjected to fire is presented in this paper A large series of numerical simulations performed with the finite element program ABAQUS were carried out and the results are discussed in this paper. Therefore, in the first phase of this research several experimental fire tests of cold-formed steel beams were undertaken to obtain the failure loads and failure modes of the beams, in other words, the results needed to validate the developed finite element model. The second phase of this research involved obvioush the development and validation of a suitable finite element model in order to simulate the structural response of the beams in fire and subjected to distortional buckling and lateral-torsional buckling effects. Finally, a parametric analvsis was carried out using the validated finite element model with the purpose to investigate numerically the effect of some parameters such as section geometry, initial applied load on the beam, span and magnitude of the initial geometric imperfections of the beams on their structural behavior. Some conclusions of this research study were that the hollow beams may have an increase of about 50% in the fire resistance, comparing to the open beams and that the initial geometric imperfections may cause a significant reducing in the critical temperature of the beams in function of the applied loading. They may even reduce by 20% the critical temperature of the beams.
Numerical analysis of cold-formed steel beams in fire
Laim, Luis (author) / Rodrigues, Joao P.C. (author) / Silva, Luis S. (author)
2013
12 Seiten, 6 Bilder, 12 Tabellen, 19 Quellen
Conference paper
English
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