Category: Completed Projects
Group: Superstructure
Subject: Inverted Ts
State: Virginia Abstract: A Virginia Tech research team will work with the Virginia Department of Transportation (VDOT) to design a new bridge on U.S. 360 over the Chickahominy River using prestressed inverted T-beams and a reinforced, cast-in-place concrete topping. The team will optimize the design of two similar Minnesota bridges built in 2005. Using precast elements reduces the time needed to construct formwork, tie reinforcing steel and place concrete on site, thus cutting traffic congestion as well. The researchers will investigate the advantages of using 0.7-inch diameter prestressing strands in the prestressed girders to determine their use in the final design of the bridge. The reinforced cast-in-place topping of the inverted T-beam is deeper than typical adjacent member systems. This design will control or eliminate reflective cracking between members, providing more durability than structures with thin, unreinforced overlays. This system also will reduce maintenance costs compared to adjacent box-beams and voided slab systems
Key Words: Bridge construction; Bridge design; Bridge members; Cast in place concrete; Precast concrete; Reinforced concrete bridges; Reinforcing steel; Traffic congestion
Specific ABC aspect:
Budget (USD): 399678.00
Project length: 30 months
Project Starting Year: 2011
Project Completion Year: 2013
View Implementation-of-a-Prestressed-Inverted-T-Beam-System-with-0.7-inch-Diameter-Prestressing-Strand-on-a-Virginia-Bridge-Report.pdf
Go to: http://vtrc.virginiadot.org/ProjDetails.aspx?Id=467
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Group: Superstructure
Subject: Inverted Ts
State: Virginia Abstract: A Virginia Tech research team will work with the Virginia Department of Transportation (VDOT) to design a new bridge on U.S. 360 over the Chickahominy River using prestressed inverted T-beams and a reinforced, cast-in-place concrete topping. The team will optimize the design of two similar Minnesota bridges built in 2005. Using precast elements reduces the time needed to construct formwork, tie reinforcing steel and place concrete on site, thus cutting traffic congestion as well. The researchers will investigate the advantages of using 0.7-inch diameter prestressing strands in the prestressed girders to determine their use in the final design of the bridge. The reinforced cast-in-place topping of the inverted T-beam is deeper than typical adjacent member systems. This design will control or eliminate reflective cracking between members, providing more durability than structures with thin, unreinforced overlays. This system also will reduce maintenance costs compared to adjacent box-beams and voided slab systems
Key Words: Bridge construction; Bridge design; Bridge members; Cast in place concrete; Precast concrete; Reinforced concrete bridges; Reinforcing steel; Traffic congestion
Specific ABC aspect:
Budget and Timeline
Budget (USD): 399678.00
Project length: 30 months
Project Starting Year: 2011
Project Completion Year: 2013
Primary Sponsor
Virginia Center for Transportation Innovation and Research
530 Edgemont Road
Charlottesville, VA 22903 USA
Primary Performing Organization
Virginia Polytechnic Institute and State University, Blacksburg
208 Patton Hall
Blacksburg, VA 24061 USA
PI: Carin Roberts-Wollmann
Other Documents
View Implementation-of-a-Prestressed-Inverted-T-Beam-System-with-0.7-inch-Diameter-Prestressing-Strand-on-a-Virginia-Bridge-Report.pdf
Other Related URLs
Go to: http://vtrc.virginiadot.org/ProjDetails.aspx?Id=467
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