Enhancing the structural performance of steel channel sections by CFRP strengthening

Selvaraj, S and Madhavan, Mahendrakumar (2016) Enhancing the structural performance of steel channel sections by CFRP strengthening. Thin-Walled Structures, 108. pp. 109-121. ISSN 0263-8231

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Abstract

The aim of this test study was to achieve an in-situ strengthening technique to retrofit the deteriorated tall steel structures using carbon fiber-reinforced polymer (CFRP). A total of 20 structural steel channel sections with various retrofitting configurations were tested to arrive at an optimal strengthening technique to improve the buckling mode of failure of structural steel channel section under flexural loading. An approach of transforming the open cross section to closed cross section was used to increase the torsional resistance of channel sections. The various parameters such as type of CFRP fabric, wrapping configuration (skin and closed wrap) and number of CFRP layers were also included in this study. The results indicate that the closed wrapped configuration with an additional (final) layer of bi-directional CFRP fabric provides the higher strength and stiffness compared to control and skin wrapped specimen due to the confinement of hoop directional fibers. This study also proves that the lateral torsional buckling (LTB) mode of failure of open cross section specimens can be improved by appropriate CFRP strengthening techniques.

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IITH Creators:

IITH Creators	ORCiD
Madhavan, Mahendrakumar	UNSPECIFIED

Item Type:

Article

Additional Information:

The second author would like to thank Uday B. Desai, Director, IIT Hyderabad for providing funding through a seed grant that made this research possible. The authors would also like to ac- knowledge the assistance offered by the Central Workshop, IIT Hyderabad in fabricating the specimens for testing.

Uncontrolled Keywords:

Carbon fiber reinforced polymers (CFRP); Strengthening; Structural steel sections; Transverse loading; Lateral torsional buckling (LTB)

Subjects:

Civil Engineering > Structural engineering and underground construction

Divisions:

Department of Civil Engineering

Depositing User:

Team Library

Date Deposited:

01 Sep 2016 05:09

Last Modified:

21 Sep 2017 07:23