Seminar - Gregory Hancock - Direct Strength Design of Cold-Formed Sections for Shear and a Signature Curve for Shear
Wednesday 17 Aug 2011, 1.00 pm - 2.00 pm
Civil Engineering Conference Room
Professor Gregory Hancock
Department of Civil Engineering
The University of Sydney
“Thin-walled sections in compression and/or bending may undergo one of the three modes of local, distortional or overall (Euler) buckling, or combinations of these. The Semi-Analytical Finite Strip Method (SAFSM) developed by YK Cheung has been widely used in computer software (THIN-WALL, CUFSM) to develop the signature curve of the buckling stress versus buckling half-wavelength for a thin-walled section under compression or bending to allow identification of these modes. The minimum points on the signature curve are now used in the Direct Strength Method (DSM) of design of cold-formed sections in the American Specification and Australian/New Zealand Standard for cold-formed steel structures.
The seminar summarises the Direct Strength Method (DSM) of cold-formed sections then extends the theory to the buckling of channel sections in pure shear. Signature curves for shear are developed for channel sections and compared with classical solutions, and those produced by the Spline Finite Strip Method (SFSM). The effect of including a web stiffener on the signature curve and buckling modes is demonstrated”.
Gregory Hancock is an Emeritus Professor and Professorial Research Fellow at the University of Sydney. He was Dean of the Faculty of Engineering and IT (2004–09), Bluescope Steel’s Professor of Steel Structures (1990–09); and director and Chairman of the Centre for Advanced Structural Engineering (1988–2003). His main research interest is in the area of cold-formed steel. He is the author of “Design of Cold-Formed Steel Structures to AS/NZS 4600:2005” published by the Australian Steel Institute in 2007, and joint author of “Cold-Formed Steel Structures to the AISI Specification” (Hancock, Murray and Ellifritt) published by Marcel Dekker, New York in 2001.