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A platform for research: civil engineering, architecture and urbanism
Finite Element Modelling of Cold-Formed Steel Members at High Temperatures
The behaviour of cold-formed thin-walled open cross-sections at high temperatures was studied through the development of advanced nonlinear finite element models. The analyses included elastic local and global (flexural and torsional-flexural) buckling models of plate parts and pin-ended columns, and post-buckling and ultimate load analyses on both columns and beams. The simple columns were considered to be integrated in lightweight steel wall frame constructions and the modelled beam to be a part of an actual floor construction. All finite element modelling was validated by comparing the analysis results with recent test results carried out in Finland and Australia and a good correspondence was obtained. An imperfection sensitivity analysis was carried out on cold-formed thin-walled steel channel columns subject to local and flexural buckling. The influence of different types and magnitudes of initial imperfections on the stiffness properties and ultimate loads of columns is considered. Also the choice of buckling curve for the design of cold-formed columns is discussed. The changes in the distribution of stresses in the beam model are shown during the temperature increase.
Finite Element Modelling of Cold-Formed Steel Members at High Temperatures
The behaviour of cold-formed thin-walled open cross-sections at high temperatures was studied through the development of advanced nonlinear finite element models. The analyses included elastic local and global (flexural and torsional-flexural) buckling models of plate parts and pin-ended columns, and post-buckling and ultimate load analyses on both columns and beams. The simple columns were considered to be integrated in lightweight steel wall frame constructions and the modelled beam to be a part of an actual floor construction. All finite element modelling was validated by comparing the analysis results with recent test results carried out in Finland and Australia and a good correspondence was obtained. An imperfection sensitivity analysis was carried out on cold-formed thin-walled steel channel columns subject to local and flexural buckling. The influence of different types and magnitudes of initial imperfections on the stiffness properties and ultimate loads of columns is considered. Also the choice of buckling curve for the design of cold-formed columns is discussed. The changes in the distribution of stresses in the beam model are shown during the temperature increase.
Finite Element Modelling of Cold-Formed Steel Members at High Temperatures
O. Kaitila (author)
2002
128 pages
Report
No indication
English
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