Static and Fatigue Behavior of Multitendon CFRP Cables with Integrated Anchorages
Publication: Journal of Composites for Construction
Volume 23, Issue 6
Abstract
This paper presents a high-capacity anchorage system for multitendon carbon fiber–reinforced polymer (CFRP) cables and the associated construction technology. Four groups of cable anchorage systems used 37 CFRP tendons, each with a diameter of 4 mm, and extensively investigated their behavior through static and fatigue tests. In the static test, the synchronous performance of the cables was studied. The mechanical properties of the cables in the anchor zone were compared with the results from a finite-element (FE) analysis, and the anchoring efficiency also was evaluated. Furthermore, the fatigue behavior of cable anchorage system was verified. The relative displacement of each component, distribution of the shear stress, retention rate of the stiffness, and strength of the cables were discussed. The results indicate that the cable exhibits excellent synchronous tensile performance. The stress and displacement distributions of the cable in the anchor zone were in good agreement with the results from the FE analysis. The stress concentration was greatly reduced by the variable stiffness of the load transfer medium via layered casting technology, and the anchoring efficiency reached 97%. The cable anchorage system sustained 2 million cycles without any macroscopic cracks forming in either the cable or anchorage at a maximum stress of (the standard strength value) and a stress range of 200 MPa. The residual strength and stiffness of the cable reached 95% and 96%, respectively, compared with the initial behavior.
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Data Availability Statement
All data and models generated or used during the study appear in the published article. The code developed during this study is available from the corresponding author by request, such as the FE program of the anchorage system.
Acknowledgments
The authors gratefully acknowledge the financial support from by the National Key Research and Development Plan of China (2017YFC0703000) and the National Science Foundation of China (No. 51678139). The authors also acknowledge Jiangsu GMV for providing the CFRP tendons.
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Published In
Journal of Composites for Construction
Volume 23 • Issue 6 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Aug 31, 2018
Accepted: Apr 23, 2019
Published online: Oct 8, 2019
Published in print: Dec 1, 2019
Discussion open until: Mar 8, 2020
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