Experimental Study and Analysis of Retrofitted Flexure and Shear Dominated Circular Reinforced Concrete Bridge Columns Subjected to Shake Table Excitation

This study focused on validating the predicted performance of circular reinforced concrete bridge columns that were subjected to earthquake excitation on a shake table. Four of the columns were flexural dominated lap-spliced columns and two were shear dominated non-lapped columns. The performance of carbon fiber jacket and steel jacket retrofitting procedures were compared with an un-retrofitted as-built column. Several moment curvature analysis programs were used to calculate the performance of the columns. The flexural dominated columns were studied for the following: stiffness, lap splice capacity, retrofit jacket strains, ductility, load path, bond slip carbon model, and shake analysis. The shear dominated columns were evaluated for: stiffness, strain rate, capacity, load path, and shake analysis.