| Popis: |
In recent years, building construction industry in Algeria has started to include light gauge steel framed (LSF) wall systems as an alternative building solution especially in seismic regions. This is due to the advantages brought by the use of Cold Formed Section (CFS) that offers high durability, flexibility and strength to weight ratio. As these steel elements are slender, they are characterized with high shape factor, and the effect of the exposure to fire conducts to the possibility of the material properties degradation under high temperature. Thus causing different failure modes of stud members when subjected to a compression loading which could be leads to the collapse of the LSF panel. In this research work, different element models of single and double Lipped Channel (LC) stud that isolated from LSF panel, protected by plasterboard are produced using ANSYS APDL software. A parametric study is done, with the variation of type of cross-section for double stud including open and closed built-up sections. The main objective of this work is to study the influence of these sections on the behaviour of CFS stud LC members and the determination of the load capacity leading to understand the different buckling failure modes that could be occur under an axial compression loading at ambient and when exposed to fire ISO834. The results predict temperature profiles, progression of temperature, critical and ultimate load, critical temperatures and the failure mode. |
