Conclusions

This paper has been concerned with an experimental study on the compressive behavior of FRP-RAC-steel hybrid columns.It has been found that the replacement ratio of recycled coarse aggregate and thickness of GFRP tubes had significant effects on the load-strain responses of such hybrid columns.Increasing the replacement ratio of recycled coarse aggregates and the thickness of the GFRP tubes reduced the ultimate load capacity but increased the ultimate axial strain.