Seismic Retrofit on Full-Scale RC Columns

Seismic Retrofit on Full-Scale RC Columns

With well-designed test frame, specimens of RC columns were subjected to high axial force and reverse-curvature moment during the cyclic loading tests. A total of four full-scale specimens were constructed and tested, one as-built benchmark specimen, and the other three specimens were retrofitted with different kinds of methods. This paper focuses on the retrofit techniques for rectangular reinforced concrete(RC) columns using various kinds of retrofit schemes. The objectives of this study include:(1) to validate existing retrofit schemes(steel jacketing and carbon fiber reinforcement plastics(CFRP) wrapping), and(2) to seek other retrofit schemes(CFRP wrapping + CFRP anchors) for rectangular RC columns. Test results demonstrated that the seismic performance of the rectangular RC columns can be enhanced significantly by the properly-constructed octagonal steel jacket and by CFRP wrapping with CFRP anchors.