Elevated steel silos and tanks commonly consist of a cylindrical shell, a conical hopper and a skirt. This report deals with the plastic collapse of hoppers which are sufficiently restrained by the junction ring for the collapse mode to be entirely confined to the hopper. The hopper joints are assumed to be stronger than the shell plate. An elastic-plastic finite element program is used to study the plastic collapse behaviour of these hoppers. It is shown that the plastic collapse mode is usually a local mechanism near the top of the hopper. Collapse strengths are determined for hoppers of both uniform thickness and varying thickness subject to uniform internal pressure with and without frictional shear. Hoppers under linearly varying pressure regimes are also briefly considered. Most of the calculations are performed using small deflection theory because this leads to well defined collapse strengths and relates to classical limit analysis.
|Title of host publication||Research Report - University of Sydney, School of Civil and Mining Engineering|
|Publication status||Published - 1 Jul 1988|
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