An Experimental Study on Seismic Performance Evaluation of Retrofitted Column of FRP Seismic Reinforcement that can be Emergency Construction

Abstract

As increasing number of large-size earthquake, the social interest of seismic retrofitting of RC structure is growing. Especially, the RC columns that are not reflected seismic design can not resist lateral loads by the earthquake. The brittle fracture of Non-seismic designed columns lead to full collapse of the building. Thus, the emergency columns reinforcement method is needed. That have a fast construction time, do not cause damage to the column. In the past, cross-sectional expansion method, a steel plate reinforcing method is applied mainly, but in recent years, carbon fiber sheet taking advantage of FRP (Fiber Reinforced Polymer) is widely used. In this study, retrofitting effect of seismic performance of FRP seismic reinforcement, which is possible to emergency construction, was examined. Reinforced concrete specimens were constructed to experimental study. The seismic performence of specimes retrifitted with FRP seismic reinforcement were evaluated. As a result, the seismic performance of specimen reinforced with FRP seismic reinforcement has been improved.

Experimental Seismic Structural Performance Evaluations of RC Columns Strengthened by Stiff-Type Polyurea

“…Currently, FRP wrapping method is considered to be the most cost-effective and simple way to improve the load-carrying capacity, ductility, and shear strength of deteriorated concrete members (Almusallam et al, 2018;Bonacci & Maalej, 2001;Chung et al, 2018;Kim et al, 2013;Lu et al, 2005;Truong et al, 2017;Youm et al, 2006). The FRP surface wrapping method gives confinement effect and stiffness enhancement to resist seismic loading.…”