Seismic Performance of Post-Mainshock FRP/Steel Repaired RC Bridge Columns Subjected to Aftershocks
This study compares the performances of three types of repair jackets on mainshock (MS) earthquake-damaged RC bridge columns subjected to aftershock (AS) attacks. These repair jackets include fiber reinforced polymers (FRP), thick steel, and thin steel wrapped with prestressing strands. Results obtained from incremental dynamic time history analyses on refined numerical finite element bridge models were utilized to evaluate the efficacy of different repair jackets application on the post-MS collapse safety of RC bridges subjected to AS attacks of various intensities. Numerical results indicated that the three repair jackets can effectively improve the bridge collapse capacity by approximately 20% under severe MS-severe AS even though they cannot restore the initial stiffness of damaged columns. Repair jackets for the severe MS-damaged columns were ineffective under moderate AS events and thus not required. Steel repair jackets exhibited higher energy dissipation under MS–AS sequences than FRP jackets. In the case of FRP jackets, bidirectional fiber wraps are recommended for plastic hinge confinement of MS-damaged bridge columns subjected to aftershocks.
M. Fakharifar et al., "Seismic Performance of Post-Mainshock FRP/Steel Repaired RC Bridge Columns Subjected to Aftershocks," Composites Part B: Engineering, vol. 72, pp. 183-198, Elsevier Science, Apr 2015.
The definitive version is available at http://dx.doi.org/10.1016/j.compositesb.2014.12.010
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Carbon-Carbon Composites (CCCs); Hybrid; Finite Element Analysis (FEA); Numerical Analysis; Repair and Retrofit
International Standard Serial Number (ISSN)
Article - Journal
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