PCI eLearning Course T215: Design and Detailing of Full-Depth Precast Concrete Deck Panels-NUDECK Panel System for Nebraska's Skyline Bridge

NUDECK Panel System for Nebraska's Skyline Bridge

Pdf Summary

The NUDECK system is a full-depth precast/prestressed concrete bridge deck panel system that was developed by the University of Nebraska-Lincoln. It was first implemented in the construction of the Skyline Bridge in Omaha, Nebraska. The deck is pretensioned in the transverse direction and post-tensioned in the longitudinal direction to ensure continued compression of the deck during its service life. The system uses high performance precast concrete that has little creep and shrinkage, resulting in a low maintenance deck. The system can be used for both concrete and steel bridges and significantly reduces construction time and traffic disruption.<br /><br />The poor condition of many stringer type bridges on U.S. roadways is largely due to the cracking and deterioration of concrete decks. Concrete shrinkage, temperature changes, and differential creep often result in cracking of cast-in-place concrete decks shortly after placement. The NUDECK system is designed to address these issues by using precast concrete panels that are installed after creep, shrinkage, and heat of hydration have taken effect. The panels are pretensioned, ensuring that there is zero residual tension in the deck at service conditions. This helps to reduce cracking and maintain the deck's performance over time.<br /><br />The NUDECK system offers several advantages over traditional cast-in-place decks. It eliminates the need for costly formwork for overhangs and reduces the speed of construction. The use of precast panels also improves quality control and reduces the risk of cracks and other issues typically associated with cast-in-place decks. The system has been successfully implemented in the Skyline Bridge in Omaha, Nebraska, and has shown promising results in terms of durability and cost-effectiveness. The use of this system could potentially help to address the deteriorating state of many bridges in the United States and reduce the need for costly repairs and replacements.

Keywords

NUDECK system

precast/prestressed concrete bridge deck

University of Nebraska-Lincoln

Skyline Bridge

compression

high performance precast concrete

creep and shrinkage

concrete and steel bridges

durability

cost-effectiveness