Failure Assessment of Lightly Reinforced Floor Slabs. I: Experimental Investigation
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Volume 137, Issue 9
Abstract
This paper is concerned with the ultimate behavior of lightly reinforced concrete floor slabs under extreme loading conditions. Particular emphasis is given to examining the failure conditions of idealized composite slabs which become lightly reinforced in a fire situation as a result of the early loss of the steel deck. An experimental study is described which focuses on the response of two-way spanning floor slabs with various materials and geometric configurations. The tests enable direct assessment of the influence of a number of key parameters such as the reinforcement type, properties, and ratio on the ultimate response. The results also permit the development of simplified expressions that capture the influence of salient factors such as bond characteristics and reinforcement properties for predicting the ductility of lightly reinforced floor slabs. The companion paper complements the experimental observations with detailed numerical assessments of the ultimate response and proposes analytical models that predict failure of slab members by either reinforcement fracture or compressive crushing of concrete.
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Acknowledgments
Funding provided by the UK Engineering and Physical Sciences Research Council (EPSRC) under Grant No.EPSRC-GBEP/C511204 for the work described in this paper is gratefully acknowledged. The writers would also like to thank the technical staff of the structures laboratories at Imperial College London, particularly Trevor Strickland, for assistance with the experimental work.
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Published In
Journal of Structural Engineering
Volume 137 • Issue 9 • September 2011
Pages: 977 - 988
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 18, 2010
Accepted: Apr 18, 2011
Published online: Apr 20, 2011
Published in print: Sep 1, 2011
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