Full-Scale Testing for Composite Slab/Beam Systems Made with Extended Stud Spacing
Publication: Journal of Bridge Engineering
Volume 16, Issue 5
Abstract
Investigation of the background of the 610 mm (24 in.) spacing of stud shear connectors showed that this limit was set on the basis of a small amount of testing of beams with spacing greater than this limit. The literature search showed that some attempts have been recently made to extend this limit. One of the objectives of the NCHRP 12-65 research project was to investigate the possibility of extending this limit to 1,220 mm (48 in.) for cluster of studs used for precast concrete panels made composite with steel I-beams. The experimental investigation included testing of push-off specimens and full-scale composite beams. Results of the push-off specimens have shown that the fatigue loading has no detrimental effect on the load-slip relationship when the number of studs is doubled per cluster. This paper covers the second part of the experimental investigation, which is fatigue and ultimate testing of full-scale composite beams. The full-scale testing has proven that full-composite action between precast concrete panels and steel girders can be achieved when the spacing between the stud clusters is extended up to 1,220 mm (48 in.).
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Acknowledgments
The research activities reported in this paper have been performed under the National Cooperative Highway Research Program projects, under Contract No. NCHRPNCHRP 12-65 “Full-depth, precast concrete bridge deck panel systems.” Special thanks are extended to David Beal of the Transportation Research Board (TRB) and all individuals who have participated in various activities of this research project.
References
AASHTO. (2007). AASHTO LRFD bridge design specifications, 4th Ed., with the 2008 interim, Washington, DC.
Badie, S. S., Girgis, F. A., Tadros, M. K., and Nguyen, N. T. (2010). “Relaxing the stud spacing limit for full-depth precast concrete deck panels supported on steel girders (phase I).” J. Bridge Eng., 15(5), 482–492.
Badie, S. S., and Tadros, M. K. (2008). “Full-depth, precast-concrete bridge deck panel systems.” National Cooperative Highway Research Program (NCHRP) Rep. No. 584, Project No. 12-65, Transportation Research Board, Washington, DC.
Badie, S. S., Tadros, M. K., Kakish, H. K., Splittgerber, D. L., and Baishya, M. C. (2002). “Large studs for composite action in steel bridge girders.” J. Bridge Eng., 7(3), 195–203.
Wire Reinforcement Institute (WRI) (2010). Manual of standard practice—Structural welded wire reinforcement, 8th Ed., Hartford, CT.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 5 • September 2011
Pages: 653 - 661
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 25, 2010
Accepted: Dec 29, 2010
Published online: Aug 15, 2011
Published in print: Sep 1, 2011
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