Method for Reducing Warping Stresses in Torsionally Loaded I-Section Members using CFRP Plates

Mamadou Konate; Zia Razzaq

doi:10.24018/ejeng.2022.7.6.2934

Research Article

Mamadou Konate

Cal Poly State University, USA

Zia Razzaq

Old Dominion University, USA.

* Corresponding author

10.24018/ejeng.2022.7.6.2934

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Submitted 2022-11-14
Published 2022-12-29

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Abstract

This paper presents a method for reducing warping normal stresses in torsionally loaded I-section members by utilizing carbon fiber-reinforced polymer (CFRP) plates. The CFRP plates are bonded to the outer surfaces of the flanges with a view to reducing warping normal stresses. The maximum warping normal stress in the flanges of a steel I-shaped member without the CFRP plates is compared to those obtained with the CFRP plates having various thicknesses. It has been found that the use of CFRP plates bonded to both flanges of the I-section result in a substantial reduction of the warping stresses. For the study presented, the maximum warping normal stress without CFRP plates drops down to merely one-third of its value when 0.625-in. thick CFRP plates are mounted on the outer surfaces of the I-section flanges.

Keywords: Carbon Fiber Reinforced Polymer, Steel I-Section, Torsional Loading, Warping Stresses Reduction.

References

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Pittaluga A. Similarities and Differences in Thin-walled Beam Theories. Technical Bulletin No. 97, Genova, Italy, 1986. Available from: https://repository.tudelft.nl/islandora/object/uuid:60a53910-47e1-45c9-88b9-5445cde978bc/datastream/OB.
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2022. Method for Reducing Warping Stresses in Torsionally Loaded I-Section Members using CFRP Plates. European Journal of Engineering and Technology Research. 7, 6 (Dec. 2022), 158–160. DOI:https://doi.org/10.24018/ejeng.2022.7.6.2934.

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Vol. 7 No. 6 (2022)

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This work is licensed under a Creative Commons Attribution 4.0 International License.

[1] Vlasov VZ. Thin-Walled Elastic Beams. Translated from Russian edition of 1940 by Israel Program for Scientific Translations. Office of Technical Services, US Department of Commerce, Washington DC, 1961.
Google Scholar

[2] Pittaluga A. Similarities and Differences in Thin-walled Beam Theories. Technical Bulletin No. 97, Genova, Italy, 1986. Available from: https://repository.tudelft.nl/islandora/object/uuid:60a53910-47e1-45c9-88b9-5445cde978bc/datastream/OB.
Google Scholar

[3] Kabir MZ, Seif AE. Lateral Torsional Buckling of Steel I-Beam Retrofitted Using FRP Sheets. Advances in FRP Composites in Civil Engineering. Berlin: Springer, 2011.
Google Scholar

[4] Lee J, Kim SE. Lateral-torsional buckling analysis of thin-walled laminated channel-section beams. Composite Structures, 2002; 56: 391-399.
Google Scholar

[5] Galambos TV, Structural Members and Frames. Englewood Cliffs, NJ: Prentice-Hall, Inc., 1968.
Google Scholar

[6] American Institute of Steel Construction. AISC Torsion Handbook. Chicago, IL, 2010.
Google Scholar

[7] American Institute of Steel Construction. AISC Manual of Steel Construction, Chicago, IL, 2022.
Google Scholar

Method for Reducing Warping Stresses in Torsionally Loaded I-Section Members using CFRP Plates

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