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Seismic Evaluation and Retrofit of Deteriorated Concrete Bridge Components

Project Description:Corrosion of steel bars in reinforced concrete structures is a major durability problem for bridges constructed in the New York State (NYS). The heavy use of deicing salt compounds this problem. Corrosion of steel bars results in loss of steel cross section, deterioration of bond between concrete and reinforcing bars, and more important, in most cases, it results in unsymmetrical concrete section that is susceptible to shear stresses produced by torsion.

Though earthquake frequency of occurrence and the expected ground accelerations in NYS is less than in western states, the potential for earthquake damage in or around NYS is still very real. Given the level of deterioration in many reinforced concrete bridges in NYS, they are considered very vulnerable to major damage during a moderate seismic event.

There is an urgent need for proper detailed guide for analysis of deteriorated reinforced concrete bridge components that could assist structural engineers estimate the reserved strength of deteriorated bridges, and design cost-effective methods for retrofit.

Proper evaluation and retrofit of existing deteriorated reinforced concrete bridges will limited the collapse of bridge during moderate seismic events in NYS and the surrounding states, and consequently save people’s lives.

The proposed project will evaluate the seismic response of typical deteriorated reinforced concrete bridges constructed in NYS. In addition, it will offer a guideline for seismic retrofit of deteriorated reinforced concrete bridge components.

Project Details

Project Dates: 
April 1, 2012 to June 30, 2013
Principal Investigators: 
Dr. Riyad S. Aboutaha
Institution: 
Syracuse University
Sponsor(s): 
Research and Innovative Technology Administration / USDOT (RITA)
Publications: 
Project Brief
Final Report
Project Status: 
Complete
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