Experimental Research on Seismic Behavior of Reinforced Concrete Columns Strengthened with TRC under Corrosion Environment
Publication: Journal of Structural Engineering
Volume 143, Issue 5
Abstract
Textile-reinforced concrete (TRC) possesses excellent bearing capacity and anticrack and corrosion-resistance abilities, which make it suitable for reinforcing concrete structures in harsh environments. However, the seismic performance of TRC-strengthened concrete columns under chloride corrosion remains unknown. Therefore, a corrosion test was conducted by the electrochemical method on seven steel-reinforced concrete (RC) columns; of these columns, two were used as the control columns, and the other five were strengthened with TRC. The corroded specimens were tested by low cyclic loading in this study, and the effects of the corrosion ratio and different reinforcement methods on the seismic behavior were studied. The results show that TRC reinforcement can effectively reduce the effect of chloride ions on steel corrosion and delay the development of cracks in concrete. The hysteresis curve, initial stiffness, and deformation capacity of the columns strengthened with TRC are superior to those of unstrengthened columns in the same corrosion environment. The displacement ductility factor of the strengthened columns decreases with the increasing corrosion ratio in different corrosion environments, while the constraint efficiency of the TRC increases. The method of reinforcement before corrosion is better than that of corrosion before reinforcement in terms of the ductility and stiffness degradation. The test shows that TRC reinforcement can effectively improve the seismic capability of RC columns in a corrosion environment.
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Acknowledgments
The authors gratefully acknowledge the financial support from the Program of the National Natural Science Foundation of China (Grant No. 51478458) and the Fundamental Research Funds for the Central Universities (2015XKMS013). The experimental work described in this paper was conducted at the Jiangsu Key Laboratory of Environmental impact and Structural Safety in Civil Engineering in the China University of Mining and Technology. Help during the testing from staffs and students at the Laboratory are greatly acknowledged.
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Published In
Journal of Structural Engineering
Volume 143 • Issue 5 • May 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Apr 15, 2016
Accepted: Oct 4, 2016
Published online: Dec 8, 2016
Published in print: May 1, 2017
Discussion open until: May 8, 2017
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