SEISMIC RETROFIT OF RECTANGULAR BRIDGE COLUMNS USING CFRP WRAPPING

SEISMIC RETROFIT OF RECTANGULAR BRIDGE COLUMNS USING CFRP WRAPPING - Printable Version

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SEISMIC RETROFIT OF RECTANGULAR BRIDGE COLUMNS USING CFRP WRAPPING - TAFATNEB - 04-03-2014

This study investigated retrofitting measures for improving the seismic performance of rectangular columns in existing bridges. Experimental tests were conducted on 0.4-scale column specimens which incorporated details that were selected
to represent deficiencies present in older bridges in Washington State. Two unretrofitted specimens were tested to examine the performance of the as-built columns incorporating lap splices at the base of the columns and deficient transverse reinforcement. Five columns were retrofitted with carbon fiber reinforced polymer (CFRP) composite wrapping and one specimen was retrofitted with a steel jacket. The specimens were subjected to increasing levels of cycled lateral displacements under constant axial load.
Specimen performance was evaluated based on failure mode, displacement ductility
capacity and hysteretic behavior.

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