This study aims to experimentally and analytically investigate the effectiveness of non-uniform wrapping on circularised reinforced concrete (RC) columns under axial and flexural loads. Sixteen specimens including four square and twelve circularised RC specimens were prepared and tested. Specimens of the first group were square RC specimens. Specimens of the second and third groups were circularised RC specimens fully wrapped with two and three plies of carbon fibre reinforced polymer (CFRP), respectively. Specimens of the fourth group were circularised RC specimens non-uniformly wrapped with CFRP. The experimental results showed that, for an equivalent amount of CFRP, the performance of circularised RC specimens fully wrapped with CFRP was better than the performance of circularised RC specimens non-uniformly wrapped with CFRP. An analytical method was developed for the failure envelopes of the tested specimens. A good correlation between the experimental and analytical failure envelopes was obtained for the tested specimens.

本研究旨在通过实验和分析方法研究在轴向和弯曲载荷下非均匀包裹在圆形钢筋混凝土（RC）柱上的有效性。准备并测试了包括四个方形和十二个圆形RC样品在内的16个样品。第一组样品是方形RC样品。第二组和第三组的样品是分别完全包裹有两层和三层碳纤维增强聚合物（CFRP）的圆形RC样品。第四组标本是用CFRP不均匀包裹的圆形RC标本。实验结果表明，在等量的CFRP下，完全包裹CFRP的圆形RC样品的性能要优于未均匀包裹CFRP的圆形RC样品的性能。针对被测样品的失效范围开发了一种分析方法。对于测试样品，在实验和分析失效范围之间获得了良好的相关性。