American Society of Civil Engineers


Compound Shear-Flexural Capacity of Reinforced Concrete–Topped Precast Prestressed Bridge Decks


by Thomas J. Mander, (Graduate Assistant Researcher, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.), John B. Mander, (Inaugural Zachry Professor I, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.), and Monique Hite Head, (corresponding author), A.M.ASCE, (Assistant Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136)

Journal of Bridge Engineering, Vol. 16, No. 1, January/February 2011, pp. 4-11, (doi:  http://dx.doi.org/10.1061/(ASCE)BE.1943-5592.0000138)

     Access full text
     Purchase Subscription
     Permissions for Reuse  

Document type: Journal Paper
Abstract: Modern concrete bridge decks commonly consist of stay-in-place (SIP) precast panels seated on precast concrete beams and topped with cast-in-place (CIP) reinforced concrete. Such composite bridge decks have been experimentally tested by various researchers to assess structural performance. However, a failure theory that describes the failure mechanism and accurately predicts the corresponding load has not been previously derived. When monotonically increasing patch loads are applied, delamination occurs between the CIP concrete and SIP panels, with a compound shear-flexure mechanism resulting. An additive model of flexural yield line failure in the lower SIP precast prestressed panels and punching shear in the upper CIP-reinforced concrete portion of the deck system is derived. Analyses are compared to full-scale experimental results of a tandem wheel load straddling adjacent SIP panels and a trailing wheel load on a single panel. Alone, both yield line and punching-shear theories gave poor predictions of the observed failure load; however, the proposed compound shear-flexure failure mechanism load capacities are within 2% accuracy of the experimentally observed loads. Better estimation using the proposed theory of composite SIP-CIP deck system capacities will aid in improving the design efficiency of these systems.


ASCE Subject Headings:
Bridge decks
Concrete bridges
Concrete slabs
Flexural strength
Panels
Punching

Author Keywords:
Concrete bridge decks
Precast panels
Concrete slabs
Yield line theory
Punching shear