An experimental investigation was carried out on a novel type of concrete-filled tube column, which used geopolymer concrete and basalt-fibre-reinforced-polymer reinforcing bars and confinement tube. Geopolymer concrete was used in place of ordinary Portland cement concrete to counter the sustainability challenges of conventional cement manufacture. Longitudinal basalt-fibre-reinforced-polymer bars were used to replace steel reinforcement to avoid corrosion, while basalt-fibre-reinforced-polymer tube confinement was used to replace the conventionally used steel helix to enhance strength and ductility. Compressive load–deformation behaviour of 200 mm dia., 800 mm high specimens under concentric, 25 mm eccentric, 50 mm eccentric and four-point bending loads was experimentally investigated. Experimental axial load–bending moment diagrams were then produced. Although geopolymer concrete is normally considered to be more brittle than Portland cement concrete, the test results showed that the specimens with geopolymer concrete were more ductile compared to those with Portland cement concrete. It was also found that increased load eccentricity resulted in ductility enhancement in specimens with both types of concrete with basalt-fibre-reinforced-polymer bars and tubes, while steel-reinforced specimens suffered loss of ductility with increased load eccentricity.

中文翻译：

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BFRP筋条加筋地质聚合物混凝土填充BFRP管柱的研究

对一种采用地聚合物混凝土和玄武岩纤维增强聚合物钢筋和约束管的新型填充混凝土管柱进行了试验研究。地质聚合物混凝土被用来代替普通的波特兰水泥混凝土，以应对传统水泥制造的可持续性挑战。纵向玄武岩纤维增强聚合物钢筋用于替代钢筋以避免腐蚀，而玄武岩纤维增强聚合物管约束用于替代常规使用的钢螺旋以提高强度和延展性。对直径为 200 毫米、高 800 毫米的试样在同心、25 毫米偏心、50 毫米偏心和四点弯曲载荷下的压缩载荷-变形行为进行了实验研究。然后制作了实验性的轴向载荷-弯矩图。虽然地质聚合物混凝土通常被认为比波特兰水泥混凝土更脆，但测试结果表明，地质聚合物混凝土的试件比硅酸盐水泥混凝土的试件更具延展性。还发现负载偏心率的增加导致具有玄武岩纤维增强聚合物棒材和管材的两种混凝土试样的延展性增强，而钢筋试样的延展性随着负载偏心率的增加而降低。