Numerical Simulation and Experimental Validation of an Integrated Sleeve-Wedge Anchorage for CFRP Rods
Publication: Journal of Composites for Construction
Volume 15, Issue 3
Abstract
The tensioning of carbon-fiber-reinforced polymer (CFRP) rods for prestressed concrete applications or posttensioning repair and strengthening has been met with mixed success. This is primarily because of limitations inherent in the use of traditional wedge anchors typically used for steel tendons. Recently, an integrated sleeve-wedge anchorage has been successfully developed specifically for CFRP rods. This paper presents a numerical simulation of the newly developed anchorage by using ABAQUS. The three-dimensional (3D) finite-element (FE) model, which considers material nonlinearity, uses hexagonal elements for the barrel, CFRP rod, and tetrahedral elements for the integrated sleeve wedge. The simulated barrel surface strains are shown to compare well with optically measured strains; however, the numerical results are shown to be sensitive to the mechanical properties of the anchorage and CFRP rod and especially the transverse elastic modulus of the CFRP rod. Finally, the simulated strain distributions throughout the anchorage as well as the distribution of CFRP rod confining pressure are presented. Such strain and pressure distributions enable insights into the inner workings of the anchorage to be achieved.
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Acknowledgments
The writers of this paper would like to express their appreciation for the financial support given by COWI A/S and Forsknings—og Innovationsstyrelsen. Furthermore, thanks are extended to Professor Henrik Stang, Associate Professor Peter Noe Poulsen, Post-Doctoral Fellow Jens Henrik Nielsen and Ph.D. candidate Christian Skodborg Hansen for their kind assistance.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 15 • Issue 3 • June 2011
Pages: 284 - 292
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Apr 24, 2010
Accepted: Aug 27, 2010
Published online: Sep 10, 2010
Published in print: Jun 1, 2011
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