Splitting Bond Capacities of Concrete Element Reinforced with Continuous Fiber
Publication: Journal of Structural Engineering
Volume 131, Issue 11
Abstract
This paper presents an experimental work and prediction of bond capacities of longitudinal steel rebar for concrete element with the polyacetal fiber (PAF) including internal reinforcements and externally wrapped sheets for confinement, where the bond capacity means an average bond resistance over a length of embedment of the rebar. The objectives of this study are to clarify bond behavior and to evaluate the bond strength. The loading tests were performed on 22 cantilever type specimens that vary on the amount and the location in a cross section, such as stirrup (peripheral around rebars), subtie, and jacketing. The test results indicated that the maximum bond capacity could improve with PAF as internal and external reinforcements consist of filaments and sheets, respectively. Considering strain behavior of transverse reinforcements, the writers proposed a new predictable equation for internal reinforcements. On the other hand, a predictable equation for the PAF sheets was also derived from the efficiency coefficient of PAF sheets on shear capacity of the RC element, which was already proposed. Both the bond strengths of average and each rebar were predicted by respective proposed equations. The close approximations were obtained to experimental data for internal and external fiber reinforcements.
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Acknowledgments
The writers wish to acknowledge Dr. Toshiyuki Kanakubo of the Tsukuba Univ. for his furnishing details of test results reported early and Professor Bunzo Tsuji, Professor Fumio Watanabe, and Dr. Yuichi Sato of the Kyoto Univ. for their valuable advice. The writers are also grateful to Mr. Hideto Ando, Mr. Yuuri Akagi, and Mrs. Yukari Ishida who were students of the Kyoto Univ. for their assistance during the experimental program, to NETUREN for providing steel rebars, and to Mr. Yutaka Shibakawa of Shibakawa Structural Office for his technical support.
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© 2005 ASCE.
History
Received: Jul 7, 2004
Accepted: Nov 19, 2004
Published online: Nov 1, 2005
Published in print: Nov 2005
Notes
Note. Associate Editor: Jin-Guang Teng
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