CFRP strengthened steel beams: Improvement in failure modes and performance analysis

Selvaraj, Sivaganesh and Madhavan, Mahendrakumar (2017) CFRP strengthened steel beams: Improvement in failure modes and performance analysis. Structures. ISSN 2352-0124 (In Press)

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Abstract

The externally bonded CFRP strengthened steel C channel beams were tested in this study to understand the improvement in failure modes. Two different CFRP strengthening methods were proposed: 1) surface strengthening (wrapping around perimeter); 2) closed strengthening in which the open cross section of the steel channel section is infilled with cardboard and converted into a closed rectangular cross section followed by CFRP wrapping to improve the buckling mode. In addition, the effectiveness of CFRP strengthening under environmental exposure is also studied by conducting the durability test with artificial rain. The results indicate that the CFRP strengthening technique employed in the present research work can significantly improve the flexural moment capacity compared to the unstrengthened specimen by converting the lateral torsional buckling (LTB) mode of failure to failure due to yielding. The durability test indicates that the infill cardboard material is not affected due to moisture exposure.

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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 acknowledge the assistance offered by the Central Workshop, IIT Hyderabad in fabricating the specimens for testing.

Uncontrolled Keywords:

CFRP; Strengthening; Structural steel beams; Lateral torsional buckling (LTB); Local buckling; Debonding

Subjects:

Civil Engineering > Construction & Building Technology
Civil Engineering > Structural engineering and underground construction

Divisions:

Department of Civil Engineering

Depositing User:

Team Library

Date Deposited:

05 Sep 2017 11:01

Last Modified:

05 Sep 2017 11:01