Buckling behavior of stiffened panels under static and dynamic loading with particular emphasis on the response of the stiffener outstands
- Queen Mary and Westfield Coll., London (United Kingdom). Dept. of Civil Engineering
- Univ. of Surrey (United Kingdom). Dept. of Civil Engineering
This paper presents results on the buckling behavior of stiffened panels loaded axially under static loading and dynamically under transverse blast pressures. Particular emphasis is placed on the torsional behavior of the outstands. The study has been carried out using non-linear finite element (FE) packages and plastic mechanism techniques. For the static analysis, an FE package (LUSAS) has been used to obtain load deflection curves, including both the peak load and the unloading characteristic for a range of geometries. The responses of stiffened panels subjected to blast loading have also been investigated using various pressure time curves. Both a simple model, consisting of a flat-panel and an individual stiffener and a more complex model of a complete blast wall have been analyzed. The analysis package (DYNA3D) accounts for material and geometric non-linearities and strain rate effects which can significantly influence the capacity of the panel. As for the static results, the dynamic analyses have been correlated with previous experimental results. The effect of tripping is shown to have a significant influence on the response, and earlier yield of the panel, when the stiffeners are in compression, is highlighted. It is also shown that provided there is adequate in-plane support to allow the panels to develop membrane action, blast pressures exceeding one bar can be resisted.
- OSTI ID:
- 194726
- Report Number(s):
- CONF-950695--; ISBN 0-7918-1307-X
- Country of Publication:
- United States
- Language:
- English
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