Uni-axial Behaviour of Plain Concrete Cylinders Confined with Hybrid CFRP/SSWM Under Elevated Temperature
摘要
An experimental investigation is presented in this paper to evaluate the performance of plain concrete cylinders wrap with hybrid carbon fiber reinforced polymer (CFRP) and stainless steel wire mesh (SSWM) jackets under varying elevated temperatures. 24 cylinders are used for this study having 100 mm in diameter and 200 mm in height. They are divided into three categories: un-strengthened (control) cylinders, double-layered CFRP strengthened cylinders (CC), and hybrid CFRP-SSWM strengthened cylinders (CS). As the specimens are exposed to temperature of 100 °C, 200 °C, and 300 °C for 2 h. Axial compression test is performed on all cylinder specimens, until failure. All CS specimens failed due to the rupture of the CFRP strips. Comparing the ultimate compressive loads at ambient temperature, the compressive strength of the control, CC, and CS specimens at 300 °C is reduced by 36.80%, 26.11%, and 22.58%, respectively. At ambient temperature, CC specimens exhibited a greater compressive strength compared to CS specimens. However, at 300 °C temperature, the compressive strength of CS is little higher compared to CC. Based on the results, it is concluded that the CS strengthening pattern demonstrates superior performance compared to the CC strengthening pattern at 300 °C temperature exposure.