Description
Knowledge on the seismic performance of damaged reinforced concrete (RC) structures after repair is essential for an effective post-earthquake disaster management policy. However, the number of experimental studies investigating the seismic behavior of repaired RC members are insufficient, especially for structural members that have suffered damages of slight or moderate levels. In this study, three identical large-scale code-conforming RC columns were tested under combined effects of axial load and reversed cyclic lateral displacements. The reference column was tested until failure, while the remaining two columns were tested after the formation of damage at different levels and repair with structural repair mortar contains recycled raw materials. The primary objectives of the experimental program are to enhance the knowledge on the post-EQ performance of damaged RC columns and to investigate the effects of repair at slight and moderate damage levels. This paper provides details on the degradation of seismic performance of code-complying RC columns due to damages and the effectiveness of the mentioned repair technique. In addition, plastic hinge modification factors that can be used for numerical representation of the structural characteristics (such as stiffness, ductility, and lateral load capacity) of the damaged and repaired members are also discussed.
