Abstract This paper aims to investigate the mechanical properties of concrete-filled glass fiber reinforced plastic (GFRP) tubular stub columns after being subjected to freeze-thaw cycles (FTCs). A total of 72 concrete-filled GFRP tubular (CFGT) stub columns treated with different FTCs were tested under axial load. The ultimate capacity, initial stiffness, load-displacement curves, load-strain curves, and failure modes were obtained and analyzed. Test results indicated that the failure phenomena of the specimens under axial compression were similar, mainly including the fracturing of GFRP tube and crushing of core concrete. The FTCs, concrete strength and column height all had a significant influence on the failure modes of the specimens. The ultimate capacity and initial stiffness decreased evidently with the increase of the number of FTCs. By increasing the height of the column, the ultimate capacity and deformation capacity of square column after FTCs could be effectively improved. The change of ultimate capacity of the CFGT column after FTCs was the result of the combined effect of FTCs, concrete compressive strength and column height. Finally, the simplified formulas for calculating the ultimate capacity of CFGT stub columns after FTCs were proposed.

中文翻译：

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GFRP 混凝土短柱在冻融循环后的压缩行为

摘要 本文旨在研究经冻融循环（FTCs）后填充混凝土的玻璃纤维增​​强塑料（GFRP）管状短柱的力学性能。在轴向载荷下测试了总共 72 个用不同 FTC 处理的混凝土填充 GFRP 管状 (CFGT) 短柱。获得并分析了极限承载力、初始刚度、载荷-位移曲线、载荷-应变曲线和失效模式。试验结果表明，试件在轴压作用下的破坏现象相似，主要是GFRP管的破裂和核心混凝土的破碎。FTC、混凝土强度和柱高都对试件的破坏模式有显着影响。随着FTC数量的增加，极限承载力和初始刚度明显下降。通过增加柱的高度，可以有效提高方柱在FTCs后的极限承载力和变形能力。FTCs后CFGT柱极限承载力的变化是FTCs、混凝土抗压强度和柱高共同作用的结果。最后，提出了计算FTCs后CFGT短柱极限容量的简化公式。