Serviceability Analysis of Concrete Beams with Different Arrangements of GFRP Bars in the Tensile Zone
Publication: Journal of Composites for Construction
Volume 18, Issue 5
Abstract
Extensive experimental investigations were carried out to investigate the serviceability (deformations and crack opening width) of fiber–reinforced polymers (FRP) reinforced concrete members. However, most of the tests were limited to conventional arrangement of bars in a section. Considering glass fiber–reinforced polymer (GFRP) bars (one of the most frequently used types of composite reinforcement), this study experimentally and analytically investigated the serviceability behavior of beams with different arrangements of reinforcement bars in the tensile zone. With particular emphasis on tension-stiffening and bond behavior, the experimental program consisted of full-scale beams and bending bond specimens. The tests revealed specific features in the behavior of the beams due to distribution of tensile bars in three layers or enlarging the cover. A numerical procedure, based on local interaction of reinforcement and surrounding concrete, was applied for serviceability analysis. Several bond stress-slip models were employed in the numerical analysis. Despite the satisfactory prediction of crack opening and deformations in general, neither of the bond models was able to give accurate results for all the beams.
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Acknowledgments
The authors wish to express their sincere gratitude for the financial support of the Research Council of Lithuania (Research Project No MIP-083/2012). Viktor Gribniak also wishes to gratefully acknowledge the financial support provided by the European Social Fund (Project No. 2013/0019/1DP/1.1.1.2.0/13/APIA/VIAA/062).
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Published In
Journal of Composites for Construction
Volume 18 • Issue 5 • October 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jul 30, 2013
Accepted: Dec 12, 2013
Published online: Feb 3, 2014
Discussion open until: Jul 3, 2014
Published in print: Oct 1, 2014
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