Determine the Amount of Inherent Column Cage Stability for Erecting Bridge Column Cages During Construction Based on Current Fabrication Practice

Analytical and experimental investigations will be conducted to understand the lateral stiffness properties of rebar cages and to determine the minimum requirements for bracing them to prevent any lateral instability. The experimental work will be conducted on several large-scale rebar cages to better understand the lateral stiffness, instability, and the failure mode under accidental and environmental lateral forces. Based on these experiments, a calibrated three-dimensional finite element model will be utilized to further investigate the lateral instability of rebar cages with various parameters such as column diameter, size and spacing of longitudinal bars, size, spacing and type of lateral bars, amount of restraint between lateral bars and longitudinal bars, and column height. Based on this investigation, guidelines for determining lateral stiffness and the minimum bracing requirements for rebar cages will be established. To validate these guidelines, selected large scale proof tests of rebar cages will be also conducted.

    Language

    • English

    Project

    • Status: Active
    • Funding: $239732.00
    • Sponsor Organizations:

      California Department of Transportation

      1227 O Street
      Sacramento, CA  United States  95843
    • Project Managers:

      El-Azazy, Saad

    • Start Date: 20060701
    • Expected Completion Date: 0
    • Actual Completion Date: 20100615
    • Source Data: RiP Project 27558

    Subject/Index Terms

    Filing Info

    • Accession Number: 01466099
    • Record Type: Research project
    • Source Agency: California Department of Transportation
    • Files: RiP, STATEDOT
    • Created Date: Jan 3 2013 3:10PM