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First published online April 28, 2019

Hybrid Jacketing for Rapid Repair of Seismically Damaged Reinforced Concrete Columns

Mostafa Fakharifar, Genda Chen [email protected], Mahdi Arezoumandi, and Mohamed ElGawadyView all authors and affiliations

Volume 2522, Issue 1

https://doi.org/10.3141/2522-07

Abstract

This study proposes hybrid jacketing for rapid repair of seismically damaged concrete columns for bridge safety. The hybrid jacketing for a reinforced concrete (RC) column is composed of a thin cold-formed steel sheet wrapped around the column and its outside prestressing strands. Although the prestressing strands can prevent buckling of the confining steel sheet, the steel sheet can in turn prevent the prestressing strands from cutting into the concrete. The hybrid jacketing concept was validated with testing of a large-scale RC column with lap splice deficiency typical of pre-1970 bridge constructions in the Central United States. Results from the original and repaired columns were compared for hysteresis loops, strength, stiffness, ductility, and energy dissipation. The hybrid jacketing proved to be effective in restoring structural behavior of the damaged column to prevent bridge collapse. Such a cost-effective solution can be implemented at bridge sites in hours. Design equations to establish the lateral force–displacement relationship of the tested column to design the hybrid jacket are derived in detail.

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References

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Published In

Transportation Research Record

Volume 2522, Issue 1

Pages: 70 - 78

Article first published online: April 28, 2019

Issue published: January 2015

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© 2015 National Academy of Sciences.

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Authors

Affiliations

Mostafa Fakharifar

209 Pine Building, 1304 North Pine Street, Butler Carlton Hall, Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, 1401 North Pine Street, Rolla, MO 65401.

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Genda Chen

Room 328, Butler Carlton Hall, Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, 1401 North Pine Street, Rolla, MO 65401.

[email protected]

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Mahdi Arezoumandi

Room 212, Butler Carlton Hall, Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, 1401 North Pine Street, Rolla, MO 65401.

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Mohamed ElGawady

Room 324, Butler Carlton Hall, Department of Civil, Architectural, and Environmental Engineering, Missouri University of Science and Technology, 1401 North Pine Street, Rolla, MO 65401.

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Notes

[email protected].

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