Modeling of RC column with lap splices strengthened by Fiber Reinforced Polymer (FRP)

Abstract

This paper presents a two-dimensional (2D) nonlinear analytical model for analyzing reinforced concrete (RC) column with short lap splice strengthened by fiber reinforced polymer (FPR) under seismic force. The model was developed based on previous proposed nonlinear model, and applied to simulate experiment studies on RC column with lap splice strengthened by FRP sheets or prefabricated plates for verification. The model is applicable to both rectangular and circular section, and to both full and partial wrapping. The model is divided into an elastic frame and an assembly of nonlinear springs to represent the elastic portion and the plastic hinge, respectively. The effectiveness of FRP wrapping for strengthening lap splice is taken into account by modifying properties of nonlinear springs. Finally, the model was incorporated into Ruaumoko2D software for analyzing RC column strengthened by FRP wrapping around lap splice zone.