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A New FRP-Encased Bridge Pier Column
Author(s) and Affiliation(s):
Mohsen Shahawy, Structural Research Center Florida Department of Transportation, Tallahassee, FL Amir Mirmiran, Department of Civil and Environmental Engineering University of Central Florida, Orlando, FL
Principal Investigator:
Amir Mirmiran
Florida Department of Transportation
Research Start Date:
September 1994
Expected Completion Date:
December 1997
Research Objectives:
The primary objective of this research is to utilize full section enclosure and confinement of concrete by fiber reinforced plastic (FRP) tubes with or without internal reinforcement to enhance load carrying capacity and durability of bridge pier columns. Fiber-wrapping of existing concrete columns has proved to be an effective retrofitting measure for seismic protection (i.e., enhanced strength and ductility) as well as environmental protection (i.e., against damages due to corrosion or freeze-thaw). This research attempts to apply the same concept to the construction of new structural columns. In order to take advantage of the high strength, low weight, and excellent corrosion resistance of fiber composites, a new concrete-filled FRP tube is proposed in which the tube is the pour form, protective jacket, confining mechanism, and shear and axial reinforcement.
Expected Products or Deliverables:
The end-product in this research is a new concrete-filled FRP tube with or without internal reinforcement. Observations from experimental studies as well as results of analytical work will help determine the feasibility, cost-effectiveness, and range of applicability of the proposed system for actual design conditions. A design program with an optimization module will accompany the design guide and recommendations.

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