Seminar - Yaip Telue - Behaviour And Design Of Cold-Formed Steel Wall Frames Lined With Plasterboard Under Axial Compression
Wednesday, August 10, 2005, 1.10 - 1.50 pm
Civil Engineering Lecture Theatre 3
Gypsum plasterboard is a common lining material used in cold-formed steel wall frame systems. It is used either with lipped or unlipped (plain) C-section studs in the construction of both the load bearing and non-load bearing walls in residential, industrial and commercial buildings. The design of these wall frames does not utilise the full strengthening effects of the plasterboard in carrying the axial loads. An experimental study has shown that the strength of the studs in compression was increased significantly when they were lined with plasterboard on one or both sides. In order to fully understand the behaviour of plasterboard lined steel wall frames, a finite element model was developed and validated using experimental results. This was followed by a detailed parametric study using finite element analyses. Some design methods based on the appropriate effective length factors were developed within the provisions of Australian/New Zealand Standard for cold-formed steel structures to predict the ultimate loads and failure modes of lined steel wall frames. The details of the finite element modelling of unlined, both sides lined and one side lined wall frames and the results will be presented in this talk.