Probabilistic Compressive Strength of Stiffened Steel Plates Exhibiting Column-Like Behavior: Ultimate and Serviceability Limit States
Publication: Journal of Structural Engineering
Volume 146, Issue 9
Abstract
The strength of longitudinally continuous stiffened steel plates, exhibiting column-like behavior under uniaxial compression, was investigated at ultimate as well as serviceability limit states. Compressive strengths were determined from nonlinear elastoplastic FE analysis, where both material and geometric nonlinearity were taken into account. In the parametric analysis, the reduced slenderness parameter () was varied from 0.4 to 1.4, and for each , thick plates and high-performance steels (SBHS) were considered along with thin plates and ordinary steels. The probabilistic distribution of the strengths was obtained through Monte Carlo simulation, in association with a response surface method. The response surface function comprises three independent variables, upon which the uncertainties in estimating the compressive strength of a certain stiffened plate depend, i.e., the residual stress, the initial out-of-plane whole-plate deflection, and the initial out-of-plane local deflection. Comparing the ultimate strength with a 5% non-exceedance probability indicates that the AASHTO, Canadian Code, and Japanese specification provides significantly conservative design, specifically for . Based on the obtained probabilistic information, partial safety factors for each were proposed, considering the mean value strengths as the nominal strengths, as an example.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. A list of items are as follows:
1.
ABAQUS input files for the nonlinear elasto-plastic FEAs.
2.
MATLAB script files for the response surface and MCS.
Acknowledgments
This work was supported by The Japan Iron and Steel Federation. The author would also like to thank ADB-JSP for supporting this research by providing a scholarship.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 9 • September 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Oct 18, 2018
Accepted: Feb 27, 2020
Published online: Jun 17, 2020
Published in print: Sep 1, 2020
Discussion open until: Nov 17, 2020
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