Elastic Fiber Ropes of Ultrahigh-Extension Capacity in Strengthening of Concrete through Confinement
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 1
Abstract
This paper deals with the experimental investigation of the use of low modulus vinylon and polypropylene fiber ropes as external confining reinforcements on standard concrete cylinders. Vinylon has a higher modulus of elasticity than polypropylene, whereas the latter has ultrahigh tensile deformation at failure. Ropes require no use of impregnating resins or mortars. The research examines low concrete strength columns in three levels of rope confinement, subjected to monotonic or cyclic loading. The effectiveness of the rope composite reinforcements is assessed by the resulting axial stress versus axial and lateral strain behavior. The elaboration also includes the stress and strain values both at 3% axial strain and at ultimate strain. Suitable fiber rope confinement may improve plain concrete strength by a factor higher than 6.6 and provide an axial strain ductility higher than 40. No column wrapped by polypropylene fiber ropes reaches fiber fracture. The performance of the retrofitted columns is discussed with respect to the fiber-reinforced polymer sheet confinement.
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Acknowledgments
The author would like to acknowledge the contribution of Skarlatos S.A. for providing concrete and of Thrace Plastics Co. S.A. for providing the polypropylene fiber ropes. Also, thanks are owed to undergraduate students A. Sourmpati, D. Karavelas, E. Pekas, and T. Dimitriadou for their help in the experimental program, and to the DUTh RC lab staff.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 1 • January 2014
Pages: 34 - 44
Copyright
© 2014 American Society of Civil Engineers.
History
Received: May 31, 2012
Accepted: Feb 5, 2013
Published online: Feb 7, 2013
Discussion open until: Jul 7, 2013
Published in print: Jan 1, 2014
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