Influence of fiber orientation and specimen end condition on axial compressive behavior of FRP-confined concrete

摘要: Abstract This paper presents an experimental investigation on the effect of fiber angle and specimen end condition axial compressive behavior reinforced polymer (FRP)-confined concrete. A total 24 aramid FRP (AFRP)-confined concrete specimens with circular cross-sections were tested. 18 these manufactured as concrete-filled tubes (CFFTs), whereas remaining 6 FRP-wrapped cylinders. The using two different mixes average strengths 50 80 MPa. influence orientation was examined through a group CFFT automated filament winding technique, fibers aligned at 45, 60 or 75 degrees respect to longitudinal axis. Additional wound along hoop direction also prepared allow comparison between inclined oriented fibers. both CFFTs specimens. parameter selected study loading jacket behavior. results this indicate that performance is optimized when are in diminishes decreasing angle. similar negligible.