Analysis of Retrofitted Concrete Columns using 3D Elastic-Plastic Modeling Zaineb Al-Maadhidi A Thesis in The Department of Building, Civil and Environmental Engineering Presented in Partial Fulfillment of the Requirements for the Degree of Master of Applied Science (Civil Engineering) at Concordia University Montr´ eal, Qu´ ebec, Canada October 2021 © Zaineb Al-Maadhidi, 2021