i Transverse Steel Confinement Effects on the Structural Behavior of Reinforced Concrete Circular Columns Strengthened with Externally-Bonded Fiber- Reinforced Polymers By DIOGO ZIGNAGO VIEIRA DISSERTATION Submitted in partial satisfaction of the requirements for the degree of DOCTOR OF PHILOSOPHY in Civil and Environmental Engineering in the OFFICE OF GRADUATE STUDIES of the UNIVERSITY OF CALIFORNIA DAVIS Approved: ________________________________________________ Michele Barbato, Chair ________________________________________________ John Bolander ________________________________________________ Lijuan Cheng Committee in Charge 2022