Design of Lean Duplex Stainless Steel Tubular Sections Subjected to Concentrated End-Bearing Loads
Publication: Journal of Structural Engineering
Volume 147, Issue 4
Abstract
This study presents the numerical investigation and design of cold-formed lean duplex stainless steel (CFLDSS) tubular sections subjected to concentrated end bearing loads, specifically end-one-flange (EOF), end-two-flange (ETF), and end loading (EL). Finite element models (FEM) were developed and verified against the test results of CFLDSS tubular sections subjected to the three loads. The FEM are able to predict the behavior of CFLDSS tubular sections in terms of ultimate strengths and web crippling failure. The verified FEM were used to perform an extensive parametric study that included a wide range of key parameters, including the ratios of flat web height to thickness, load bearing length to web thickness, and load bearing length to flat web height. Based on both the test and numerical results, new coefficients are proposed for the unified design equation and the direct strength method for the design of CFLDSS tubular sections subjected to the three concentrated end bearing loads. The strengths obtained from the tests and the parametric study were compared with the nominal strengths calculated using the design equations from current specifications and those in the literature, as well as those proposed in this study. Overall, the modified design rules provided more accurate predictions compared with the design rules in the current specifications and literature. The results showed that the proposed design methods are suitable for the web crippling design of CFLDSS tubular sections under the three concentrated end bearing loads.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Apr 13, 2020
Accepted: Oct 16, 2020
Published online: Jan 20, 2021
Published in print: Apr 1, 2021
Discussion open until: Jun 20, 2021
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