Civil and Environmental Engineering Publications
Document Type
Article
Publication Date
2017
Journal
Engineering Structures
Volume
132
First Page
172
URL with Digital Object Identifier
10.1016/j.engstruct.2016.11.014
Last Page
187
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Abstract
Analysis of jacketed Reinforced Concrete (RC) beams considering the interfacial slip effect is a complicated problem. In the current practice, slip is neglected in the analysis and monolithic behavior is assumed in the jacketed section resulting in higher estimates of stiffness and/or capacity. Engineers need simplified yet robust tools to predict the actual behavior of jacketed RC beams. This paper provides a simplified method to analyze jacketed RC beams taking into account the interfacial slip distribution and the actual nonlinear behavior of both concrete and steel. An iterative calculation algorithm is developed to determine the moment-curvature and load-deflection curves of the jacketed beams. The developed method provides an evaluation of the slip and shear stress distributions, which allow assessing the influence of surface roughness conditions. The developed method is utilized to conduct an extensive parametric study, which resulted into modification factors to calculate the capacity and deformations of strengthened beams while accounting for interfacial slip.
