Stiffened steel plates under uniaxial compression |
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| Affiliation: | 1. Colt Engineering, Edmonton, AB, Canada;2. Department of Civil & Environmental Engineering, University of Alberta, Edmonton, AB, Canada;1. Department of Naval Architecture and Ocean Engineering, College of Engineering, Seoul National University, Seoul, Republic of Korea;2. Institute of Engineering Research & Research Institute of Marine Systems Engineering, Seoul National University, Seoul, Republic of Korea;3. Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, Glasgow, United Kingdom;4. Institute for Manufacturing, University of Cambridge, Cambridge, United Kingdom;5. Ocean and Ship Technology (OST) Research Group, Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Seri Iskandar, Perak, Malaysia;6. Department of Manufacturing Systems and Design Engineering, Seoul National University of Science and Technology, Seoul, Republic of Korea;1. Marine Offshore and Subsea Technology Group, Newcastle University, NE1 7RU Newcastle upon Tyne, UK;2. Graduate Institute of Ferrous Technology, POSTECH, 37673, Pohang, South Korea;3. Ocean & Ship Technology (OST) Research Group, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak, Malaysia;4. Department of Manufacturing Systems and Design Engineering, SeoulTech, 01811, Seoul, South Korea;1. School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | The stability of steel plates stiffened with tee-shape sections under uniaxial compression and combined uniaxial compression and bending was investigated using a finite element model. The emphasis of the work presented in this paper was to find the parameters that uniquely describe the strength and behaviour of stiffened steel plates. A finite element model, validated using the results of tests on full-size stiffened plate panels, was used to investigate the scale effect for five dimensionless parameters. The parameters investigated were: the transverse slenderness of the plate, the slenderness of the web and flange of the stiffener, the ratio of torsional slenderness of the stiffener to the transverse slenderness of the plate, and the stiffener-to-plate area ratio. Average magnitude residual stresses and initial imperfections were assumed for this study.A parametric study covering a wide range of dimensionless parameters indicated that stiffened steel plates do not fail by stiffener tripping unless a bending moment is applied to create flexural compressive stresses in the stiffener. Although plate buckling and overall buckling were found to lead to a very stable post-buckling behaviour, the interaction between these two buckling modes was found to give rise to a sudden loss of capacity following initial plate buckling. The plate transverse slenderness, the stiffener slenderness-to-plate slenderness ratio, and the stiffener-to-plate area ratio were found to have a significant effect on this behaviour.A comparison of the numerical analysis results with API and DnV design guidelines indicates that the guidelines predict stiffened steel plate capacity with various degrees of success, depending on the governing mode of failure. Neither guidelines address the potential interaction-buckling phenomenon. |
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