Distortional Buckling–Moment Resistance Capacity of Hybrid Double-I-Box Beams
Publication: Journal of Structural Engineering
Volume 144, Issue 9
Abstract
This paper presents a comprehensive experimental and numerical study on distortional buckling–moment resistance capacity of built-up cold-formed steel hybrid double-I-box beams (HDIBBs) under four-point bending. These built-up beams are fabricated by means of four press-braked channel sections that are fastened together using bolted connections. The cross section of this closed-form built-up beam resembles the shape of a double-I box. Three different parameters were considered: (1) a hybrid parameter ratio that is yield strengths of flange steel to web steel ; (2) ratio of breadth to the overall depth of the section ; and (3) flange thickness . All the tested beams failed in a sort of distortional buckling mode. The test results revealed that the use of higher-grade steel in the flanges had a significant influence on buckling failure modes and moment capacities of the built-up members. In the hybrid built-up beams, the use of thicker and stiffened flange plates enhanced the moment carrying capacity of HDIBBs. It was found that the flange plate slenderness () plays a major part in reducing the member moment resistance capacity due to local and distortional buckling of flanges. Appropriate nonlinear finite-element (FE) models were developed using commercially available software, and numerical analysis was performed. The FE and actual test results were in good agreement in terms of ultimate moment capacities and buckling modes. Therefore, the FE models were verified. The results were compared with the predicted member buckling resistance capacities from a standard design rule, which was found to slightly overestimate in its results.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors would like to thank Technical Education Quality Improvement Programme-II for providing the first author [Reg. No. 1314169121] with a monthly stipend for the first 2 years of the full-time Ph.D. research program. The authors gratefully acknowledge Easwari Engineering College, Chennai, and Centre of Excellence of PSG College of Technology, Coimbatore, for providing laboratory facilities. The authors also especially thank all other sources of financial support.
References
AISI (American Iron and Steel Institute). 2012. North American specification for the design of cold-formed steel structural members. AISI S-100-12. Washington, DC: AISI.
CEN (European Committee for Standardization). 2004. European standard for hot rolled structural—Part 2: Technical delivery conditions for non alloy structural steel. EN 10025. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2005. Eurocode 3: Design of steel structures—Part 1-1: General rules and rules for buildings. EN 1993-1-1. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2006a. Eurocode 3: Design of steel structures—Part 1-3: General rules -Supplementary rules for cold-formed members and sheeting. EN 1993-1-3. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2006b. Eurocode 3: Design of steel structures—Part 1-5: General rules—Plated structural elements. EN 1993-1-5. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2006c. European standard for cold rolled low carbon steel flat products—Technical delivery conditions. EN 10130. Brussels, Belgium: CEN.
CEN (European Committee for Standardization). 2009. Metallic materials– Tensile testing. 1: method of test at room temperature. EN ISO 6892-1. Brussels, Belgium: CEN.
Georgieva, I., L. Schueremans, L. Pyl, and L. Vandewalle. 2012. “Experimental investigation of built-up double-Z members in bending and compression.” Thin-Walled Struct. 53 (4): 48–57. https://doi.org/10.1016/j.tws.2011.12.017.
Laím, L., J. P. C. Rodrigues, and L. S. da Silva. 2013. “Experimental and numerical analysis on the structural behaviour of cold-formed steel beams.” Thin-Walled Struct. 72 (11): 1–13. https://doi.org/10.1016/j.tws.2013.06.008.
Landolfo, R., O. Mammana, F. Portioli, G. Di Lorenzo, and M. R. Guerrieri. 2008. “Laser welded built-up cold-formed steel beams: Experimental investigations.” Thin-Walled Struct. 46 (7–9): 781–791. https://doi.org/10.1016/j.tws.2008.03.009.
Niu, S., K. J. R. Rasmussen, and F. Fan. 2014. “Distortional-global interaction buckling of stainless steel C-beams: II - Numerical study and design.” J. Constr. Steel Res. 96 (5): 40–53. https://doi.org/10.1016/j.jcsr.2014.01.008.
Schafer, B. W., and T. Pekoz. 1998. “Computational modelling of cold-formed steel: Characterising geometric imperfections and residual stresses.” J. Constr. Steel Res. 47 (3): 193–210. https://doi.org/10.1016/S0143-974X(98)00007-8.
Shokouhian, M., and Y. Shi. 2015. “Flexural strength of hybrid steel I-beams based on slenderness.” Eng. Struct. 93 (6): 114–128. https://doi.org/10.1016/j.engstruct.2015.03.029.
Tondini, N., and A. Morbioli. 2015. “Cross-sectional flexural capacity of cold-formed laterally-restrained steel rectangular hollow flange beams.” Thin-Walled Struct. 95 (10): 196–207. https://doi.org/10.1016/j.tws.2015.06.018.
Wang, L., and B. Young. 2015a. “Behavior of cold-formed steel built-up sections with intermediate stiffeners under bending. I: Tests and numerical validation.” J. Struct. Eng. 142 (3): 04015150. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001428.
Wang, L., and B. Young. 2015b. “Behavior of cold-formed steel built-up sections with intermediate stiffeners under bending. II: Parametric study and design.” J. Struct. Eng. 142 (3): 04015150. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001427.
Xu, L., P. Sultana, and X. Zhou. 2009. “Flexural strength of cold-formed steel built-up box sections.” Thin-Walled Struct. 47 (6–7): 807–815. https://doi.org/10.1016/j.tws.2009.01.005.
Zhou, X. H., and Y. Shi. 2011. “Flexural strength evaluation for cold-formed steel lip-reinforced built-up I-beams.” Adv. Struct. Eng. 14 (4): 597–611. https://doi.org/10.1260/1369-4332.14.4.597.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Aug 30, 2017
Accepted: Feb 4, 2018
Published online: Jun 20, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 20, 2018
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.