Structural behavior of concrete filled double-skin PVC tubular columns confined by plain PVC sockets

Abstract The behavior of concrete-filled double-skin poly vinyl chloride (PVC) tubular columns confined by plain PVC sockets is studied in this research. plastic pipes have been used with concrete as columns. has several advantages it inexpensive, light weight for construction, and decrease the time taken construction. Thus can be an alternative to metal various applications which maintenance cost increased corrosion reduced. This study experimental work on four groups composite hollow columns, each group containing three different samples. effects parameters are studied, including slenderness ratio, compactness compressive strength, confinement ratio. results show that stiffness, well ductility loadings were considerably influenced all these parameters. An increase loading carrying capacity about 40.4% was noticed ratio decreased from 20 12 21.1% 50 25. Besides, rate load 96.6% strength 33 54 MPa. For case variation 25 75%, axial 56.7%. main benefit type column interaction between tube concrete. restriction delay local buckling so enlarged effect confining provided tube.