Effect of high temperature on FRCM-confined concrete

The paper investigates the effect of high temperature exposure on the performance of concrete confined through textile/fabric-reinforced composites. Small-scale cylindrical specimens (150 × 300 mm) were confined using two types of carbon fibers (dry and epoxy-resin coated). For the sake of comparison, two confining layers were applied to all specimens. After curing, cylinders were exposed to four ranges of increasing temperatures—being 20°C (ambient), 80°C, 100°C, and 250°C and, after cooling down, were tested under compressive cyclic loading. The experimental results show that thermal stress significantly influences the confinement effectiveness of textile-reinforced composites. Exposure to high temperatures reduces the ultimate confined strength and significantly influences the overall axial stress–strain behavior.