Experimental Study of In-Plane Shear Behavior of Fiber-Reinforced Concrete Composite Slabs
Publication: Journal of Structural Engineering
Volume 142, Issue 3
Abstract
This study investigates the in-plane shear behavior of composite slabs reinforced with different types of secondary reinforcements. Experimental results of 20 large-scale composite slabs constructed with two different deck profiles (reentrant and trapezoidal) are presented. The slabs were instrumented and tested in a cantilever diaphragm configuration under monotonic in-plane shear to assess and compare the effect of secondary reinforcement on their in-plane shear capacity. Five types of secondary reinforcements were considered: Conventional WWM of sizes A142 and A98, synthetic macrofibers at dosage rates of 3.0 and , and hooked-end steel fibers at a dosage rate of . Tests were carried out for both strong and weak orientation of decking. The load-deflection and load-strain responses were measured, and the cracking pattern and sequence were observed. The results showed that fibers notably improved the in-plane shear behavior (strength and ductility) of the composite slabs. Steel mesh of size A142, synthetic macrofibers at a dosage rate of , and steel fibers at a dosage rate of all provided comparable in-plane shear capacity and ductility. Therefore, they can be viewed as equivalent secondary reinforcement systems in composite slabs. The results also revealed that the deterioration of the interfacial bond between concrete and steel deck was not influenced by the type of the secondary reinforcement.
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Acknowledgments
Support for this project is partly provided by the “Sustainable Construction Materials and Structural Systems” research group at the University of Sharjah. The authors would also like to thank Emirates Stones Company Ltd, Sharjah, who supported this project during the construction stage. In addition, the authors want to express their gratitude to Grace Middle East, Dubai-UAE, for providing the fibers and to Richard Lee Steel Decking, U.K., for supplying the steel decking.
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Information
Published In
Journal of Structural Engineering
Volume 142 • Issue 3 • March 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Sep 24, 2014
Accepted: Aug 11, 2015
Published online: Oct 30, 2015
Published in print: Mar 1, 2016
Discussion open until: Mar 30, 2016
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