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Title: Strength, Stiffness, and Cyclic Deformation Capacity of Concrete Jacketed Members

Author(s): Stathis N. Bousias, Dionysis Biskinis, Michael N. Fardis, and Alexis-Loukas Spathis

Publication: Structural Journal

Volume: 104

Issue: 5

Appears on pages(s): 521-531

Keywords: column(s); concrete jacket; cyclic loading; deformation; seismic; stiffness; strength; test

Date: 9/1/2007

Abstract:
Columns with plain vertical bars and no detailing for earthquake resistance are rehabilitated with shotcrete jackets connected to the old column through various means and subjected to cyclic uniaxial lateral loading up to ultimate conditions to investigate the effect of different means of connection at the interface on the effectiveness of the jacket. These test results are supplemented with data from the literature for different means of connection of the jacket to the old column to develop simple rules and expressions for the calculation of the yield moment, the drift at yielding, the secant-toyield stiffness, and the ultimate drift in cyclic loading of jacketed columns with or without lap splicing at the base of the old column. These rules give the yield moment, the drift at yielding, the secantto- yield stiffness, and the ultimate drift in cyclic loading of jacketed columns as a ratio of the corresponding quantities of an equivalent monolithic member.




  

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