Numerical study on structural behaviour of cold-formed steel columns under fire conditions

摘要

This paper presents the results of numerical studies on the behaviour of cold-formed galvanizedrnsteel columns under fire conditions, based on results of experimental tests, previously conducted by the authors.rnThis numerical study was performed by the finite element program ANSYS. First, it is presented the detailsrnof the finite element models used in this research and compared the finite element analysis results with thosernobtained in the experimental tests. Moreover, it is carried out a parametric study in order to investigate therninfluence of the axial restraining to the thermal elongation of the column, the axial preload ratio on the columnsrnmechanical behaviour.