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    Performance-based Seismic Retrofit Strategy for Existing Reinforced Concrete Frame Systems using FRP composites

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    Author
    Pampanin, S.
    Bolognini, D.
    Pavese, A.
    Date
    2007
    Permanent Link
    http://hdl.handle.net/10092/735

    The feasibility and efficiency of a seismic retrofit intervention using externally bonded fiber-reinforced polymer composites on existing reinforced concrete frame systems, designed prior to the introduction of modern standard seismic design code provisions in the mid-1970s, are herein presented, based on analytical and experimental investigations on beam-column joint subassemblies and frame systems. A multilevel retrofit strategy, following hierarchy of strength considerations, is adopted to achieve the desired performance. The expected sequence of events is visualized through capacity-demand curves within M-N performance domains. An analytical procedure able to predict the enhanced nonlinear behavior of the panel zone region, due to the application of CFRP laminates, in terms of shear strength (principal stresses) versus shear deformation, has been developed and is herein proposed as a fundamental step for the definition of a proper retrofit solution. The experimental results from quasistatic tests on beam-column subassemblies, either interior and exterior, and on three-storey three-bay frame systems in their as-built and CFRP retrofitted configurations, provided very satisfactory confirmation of the viability and reliability of the adopted retrofit solution as well as of the proposed analytical procedure to predict the actual sequence of events

    Subjects
    reinforced concrete
     
    beam columns
     
    frames
     
    fiber reinforced polymers
     
    retrofitting
     
    Fields of Research::290000 Engineering and Technology::290800 Civil Engineering::290801 Structural engineering
     
    Fields of Research::290000 Engineering and Technology::290800 Civil Engineering::290805 Geotechnical engineering
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    • Engineering: Journal Articles [932]
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