Modified Yield Line Theory for Full-Depth Precast Concrete Bridge Deck Overhang Panels
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Volume 16, Issue 1
Abstract
Full-depth precast deck slab cantilevers also referred to as full-depth precast concrete bridge deck overhang panels are becoming increasingly popular in concrete bridge deck construction. To date, no simple theory is able to estimate the overhang capacity of full-depth concrete bridge deck slabs accurately. Observations suggest that interaction between flexure and shear is likely to occur as neither alone provides an accurate estimate of the load-carrying capacity. Therefore, modified yield line theory is presented in this paper, which accounts for the development length of the mild steel reinforcing to reach yield strength. Failure of the full-depth panels is influenced by the presence of the partial-depth transverse panel-to-panel seam. When applying a load on the edge of the seam, the loaded panel fails under flexure while the seam fails in shear. Through the use of the modified yield line theory coupled with a panel-to-panel shear interaction, analytical predictions are accurate within 1–6% of experimental results for critical cases.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 16 • Issue 1 • January 2011
Pages: 12 - 20
Copyright
© 2011 ASCE.
History
Received: Aug 10, 2009
Accepted: Jul 28, 2010
Published online: Dec 15, 2010
Published in print: Jan 2011
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