Poly Vinyl Chloride (PVC) material, which exhibits high tensile capacity, economical cost, and excellent corrosion resistance, has attracted the interest of many researchers for using in construction engineering. Existing studies reveal that fiber-reinforced polymer (FRP) confinement is a high-efficiency method for strengthening concrete columns, which can be divided into FRP sheets fully and partially wrapped columns. In recent years, the combination of PVC tubes and FRP as a hybrid confinement system can effectively improve the mechanical properties of concrete columns. Rubberized concrete, which incorporates rubber waste as a partial replacement for conventional aggregates, can improve the ductility, and energy absorption, while lowering other qualities such as compressive strength, tensile strength, and elastic modulus. In order to overcome these shortages, this paper proposes a new type of composite column aimed for new construction, that rubberized concrete is filled into PVC tubes externally wrapped by basalt fiber-reinforced polymer (BFRP) strips. Its compression performance was investigated, and the test variables included the replacement percentage of rubber waste (i.e. 10% and 60%) and the net-spacing of FRP strips (i.e. 25 mm and 50 mm). The test results demonstrated that the PVC-FRP system considerably improved the load capacity and deformation capacity of rubberized concrete columns. The peak axial stress and axial strain increased obviously with the shortened net distance of FRP strips. Besides, the promotional effect of PVC-FRP confinement became more apparent when the mixture of rubber particles in concrete was enhanced. A modified efficiency coefficient was given at the end of this paper which can provide a comparative accurate prediction of the compressive strength for PVC-FRP confined rubberized concrete.

聚氯乙烯（PVC）材料具有高拉伸能力、经济成本和优异的耐腐蚀性能，在建筑工程中的应用引起了许多研究人员的兴趣。现有研究表明，纤维增强聚合物（FRP）约束是一种高效的混凝土柱加固方法，可分为FRP片材全包裹柱和部分包裹柱。近年来，PVC管与FRP结合作为混合约束体系，可以有效提高混凝土柱的力学性能。加入橡胶废料作为传统骨料的部分替代品的橡胶混凝土可以提高延展性和能量吸收，同时降低其他质量，如抗压强度、抗拉强度和弹性模量。为了克服这些不足，本文提出了一种针对新建筑的新型复合柱，将橡胶混凝土填充到由玄武岩纤维增强聚合物（BFRP）条包裹的PVC管中。对其压缩性能进行了研究，测试变量包括橡胶废料的替代百分比（即10%和60%）和玻璃钢条的净间距（即25 mm和50 mm）。试验结果表明，PVC-FRP体系显着提高了橡胶混凝土柱的承载能力和变形能力。随着玻璃钢带材净距的缩短，峰值轴向应力和轴向应变明显增加。此外，随着混凝土中橡胶颗粒配合量的增加，PVC-FRP约束的促进作用更加明显。