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Rapid Seismic Repair of Column to Footing Connections – Phase 2
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2021-05-31
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[PDF-33.72 MB]
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Edition:FINAL REPORT, Jan. 2019 through May 2022
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Abstract:Presented in this report is the development of a rapid seismic repair of column to footing connections. The use of plastic hinge relocation as a repair technique for extreme levels of damage in reinforced concrete bridge columns is investigated. Before the development of this repair, if a column was severely damaged (e.g. had fractured longitudinal bars) a complete replacement of the bridge was suggested. Prior studies have already shown the repair’s ability to restore a damaged column’s load and displacement capacities, and its potential for rapid deployment is favorable. This research aimed to improve the repair constructability by using a bolted connection and methods for simplified implementation. Another goal of this research was to improve repair performance by anchoring previously fractured bars to increase seismic resistance, and enhance the behavior of the relocated hinge when these bars are anchored.
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