Pull-Out Behavior of CFRP Single-Strap Ground Anchors
Publication: Journal of Composites for Construction
Volume 21, Issue 3
Abstract
Pull-out experiments were performed on four carbon fiber–reinforced polymer (CFRP) ground anchors simulating their applications in rock and soil. The CFRP tendons used in these anchors comprise a single-strap end on both ground and air sides. On the ground side, the single-strap end is embedded in a prefabricated cylinder of high-strength grout that fits into the borehole. In rock applications, the ground-side anchor can be used without additional confinement, while in the case of soil, an additional CFRP confinement ring is needed to prevent premature grout failure in the strap region. The load transfer from the strap to the grout cylinder occurs progressively; approximately 50% of the load is transferred at the semicircular strap end, while the remaining 50% is transferred at the curved transition from the strap to the rod segment of the free length.
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Acknowledgments
The authors wish to acknowledge the support and funding of this research by the Swiss Federal Commission for Technology and Innovation CTI (Grant No. KTI 14139.2 PFIW-IWF) and industry partners F.J. Aschwanden AG in Lyss, Carbo-Link AG in Fehraltorf (supplier of the CFRP tendon specimens), and Sika Schweiz AG in Zurich, Switzerland (supplier of the cement grout).
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Published In
Journal of Composites for Construction
Volume 21 • Issue 3 • June 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Jun 16, 2016
Accepted: Aug 15, 2016
Published online: Oct 10, 2016
Discussion open until: Mar 10, 2017
Published in print: Jun 1, 2017
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