In this study, the behavior of axially loaded plain and fiber-reinforced geopolymer concrete columns reinforced with glass fiber-reinforced polymer (GFRP) bars and helices was investigated. Ten ambient-cured geopolymer concrete columns of 160 mm diameter and 640 mm height were cast and tested under concentric axial loads. The behavior of the columns was investigated under the effect of the type of reinforcement (steel vs. GFRP), pitch of the GFRP helices (40, 75, 100 mm), and addition of nonmetallic fibers, that is, glass fiber and polypropylene fiber. It was found that GFRP bar reinforced geopolymer concrete column achieved less axial load, confinement efficiency, and ductility compared to the geopolymer concrete column reinforced with the same amount of the steel reinforcement. Overall, the reduction in the pitch of the GFRP helices enhanced the confinement efficiency, post-peak behavior, and ductility of the plain and fiber-reinforced geopolymer concrete columns. Also, the addition of fibers significantly improved the ductility of the GFRP bar reinforced geopolymer concrete columns.

中文翻译：

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带玻璃纤维增​​强聚合物笼子的轴向荷载平面和纤维增强地聚合物混凝土柱的性能

在这项研究中，研究了用玻璃纤维增​​强聚合物 (GFRP) 钢筋和螺旋增强的轴向载荷平面和纤维增强地质聚合物混凝土柱的行为。10 个直径为 160 毫米、高度为 640 毫米的环境固化地质聚合物混凝土柱在同心轴向载荷下进行铸造和测试。在钢筋类型（钢与 GFRP）、GFRP 螺旋节距（40、75、100 毫米）和添加非金属纤维（即玻璃纤维和聚丙烯纤维）的影响下研究了柱的行为. 结果表明，与用相同数量的钢筋加固的地质聚合物混凝土柱相比，GFRP 钢筋加固地质聚合物混凝土柱的轴向载荷、约束效率和延性更小。全面的，GFRP 螺旋螺距的减小提高了普通和纤维增强地质聚合物混凝土柱的约束效率、峰值后行为和延展性。此外，纤维的添加显着提高了 GFRP 钢筋地聚合物混凝土柱的延展性。