Flexural Behavior of Reinforced Concrete Beams with TRC Tension Zone Cover
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Volume 26, Issue 2
Abstract
This research makes a further contribution to the existing knowledge regarding textile-reinforced concrete (TRC) structural members, and the proposed component combines the advantages of TRC and reinforced concrete (RC). This concrete member was experimentally studied and its analytical formulae were derived. Test results of the flexural experiment study indicated that the beams with the TRC layer had some increases in the first crack load, the yield load, and the ultimate moment capacity, compared with the ordinary RC beams, and furthermore the ultimate moment capacity had significant increases with the increase of the reinforcement ratio of textile. A considerable reduction in the crack width and spacing was also observed for the beam with a TRC layer, and thus the postcracking stiffness of the beam was improved. Furthermore, this concrete member has satisfactory flexural ductility. For a single reinforced concrete beam with a rectangular cross section, two types of limit failure states are presented with respect to different reinforcement ratio of textile, and for each state, the relationship between the reinforcement ratio of textile and the reinforcement ratio of steel bar is derived. The calculation methods for the ultimate moment capacity for three failure modes and the midspan deflection during the entire loading process are also presented. A comparison between the calculated and the experimental results reveals a satisfactory agreement and verifies the feasibility of the formulae.
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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. 51108451), the Natural Science Foundation of Jiangsu Province of China (BK 2011220), the Key Program of Science and Technology of Zhejiang Province of China under Grant No. 2011C11083, and the Key Science and Technology Innovation Team of Zhejiang Province (2010R50034). 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 Materials in Civil Engineering
Volume 26 • Issue 2 • February 2014
Pages: 320 - 330
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© 2014 American Society of Civil Engineers.
History
Received: Nov 8, 2012
Accepted: Mar 5, 2013
Published online: Mar 7, 2013
Discussion open until: Aug 7, 2013
Published in print: Feb 1, 2014
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