TY - JOUR
T1 - A new precast concrete deck system for accelerated bridge construction
AU - Morcous, George
AU - Hatami, Afshin
AU - Jaber, Fouad
N1 - Funding Information:
The research project was sponsored by Nebraska Department of Transportation (NDOT). The contributions of NDOT engineers and staff under the leadership of Mark Traynowicz are highly appreciated. Thanks to Mark Lafferty and Todd Culp from Precast Concrete Association of Nebraska for the specimen donation. Special thanks for Maher K. Tadros from E.Construct, Inc. for guidance at the early stages of the project. The assistance of the following graduate students—Shaddi Assad, Michael Asaad, Peter Samir, and Raed Tawadrous—in the experimental work is highly appreciated.
Publisher Copyright:
Copyright © 2018 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959.
PY - 2018/5/30
Y1 - 2018/5/30
N2 - Full-depth precast concrete (PC) deck systems have several advantages over cast-in-place concrete decks in bridge construction, such as improved product quality, reduced construction labor and duration, and less dependence on weather and site conditions. This article presents he development of a new full-depth PC deck system that overcomes the drawbacks of existing systems, which include large numbers of joints and openings that need to be field cast, a requirement for tight tolerances in panel production and erection, a need for an overlay, and a complexity of post-tensioning and grouting operations. The developed deck system consists of full-depth, full-width PC deck panels that are 12 ft (3.66 m) long to minimize the number of transverse joints that need to be field cast. Panels have covered shear pockets at 4-ft (1.22 m) spacing over each girder line. These pockets are designed to minimize the number of shear connectors and deck surface penetrations to eliminate deck overlay. Deck panels are prestressed in both directions: pre-tensioned in the transverse direction and post-tensioned in the longitudinal direction using a new approach that is ductless and easy to install. These unique features are expected to enhance deck constructability, durability, and economy. The article presents the deck system design, construction sequence, and laboratory investigations conducted prior to its implementation in the construction of the Kearney East Bypass bridge in the State of Nebraska, USA.
AB - Full-depth precast concrete (PC) deck systems have several advantages over cast-in-place concrete decks in bridge construction, such as improved product quality, reduced construction labor and duration, and less dependence on weather and site conditions. This article presents he development of a new full-depth PC deck system that overcomes the drawbacks of existing systems, which include large numbers of joints and openings that need to be field cast, a requirement for tight tolerances in panel production and erection, a need for an overlay, and a complexity of post-tensioning and grouting operations. The developed deck system consists of full-depth, full-width PC deck panels that are 12 ft (3.66 m) long to minimize the number of transverse joints that need to be field cast. Panels have covered shear pockets at 4-ft (1.22 m) spacing over each girder line. These pockets are designed to minimize the number of shear connectors and deck surface penetrations to eliminate deck overlay. Deck panels are prestressed in both directions: pre-tensioned in the transverse direction and post-tensioned in the longitudinal direction using a new approach that is ductless and easy to install. These unique features are expected to enhance deck constructability, durability, and economy. The article presents the deck system design, construction sequence, and laboratory investigations conducted prior to its implementation in the construction of the Kearney East Bypass bridge in the State of Nebraska, USA.
KW - Accelerated construction
KW - Bridge deck
KW - Interface shear
KW - Post-tensioning
KW - Precast concrete
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U2 - 10.1520/ACEM20170108
DO - 10.1520/ACEM20170108
M3 - Article
AN - SCOPUS:85047744655
VL - 7
JO - Advances in Civil Engineering Materials
JF - Advances in Civil Engineering Materials
SN - 2379-1357
IS - 3
ER -