GFRP-圆形箍筋双约束ECC混凝土柱的轴压性能

doi:10.19936/j.cnki.2096-8000.20260828.011

摘要/Abstract

摘要： 为研究方形GFRP管-圆形箍筋双约束纤维混凝土柱的轴压性能,设计了6根组合柱并进行了轴压试验。观察纤维组合柱在轴压下的破坏状态,基于荷载-位移曲线分析了不同纤维掺量和箍筋间距对纤维组合柱轴压性能的影响,并提出了纤维组合柱的轴压理论承载力计算式。结果表明:在相同的箍筋间距下,随着纤维掺量的增加,组合柱的极限承载力和延性都有不同程度的增加。纤维掺量为1.5%的组合柱相较于纤维掺量为1%的组合柱,极限承载力提升幅度为12.4%~14.3%,延性提升幅度为24.6%~36.8%。相同纤维掺量下,随着箍筋间距的增加,组合柱试件的极限承载力和延性都有不同程度下降。基于本文提出的轴压承载力计算式得出的计算结果与试验结果吻合较好,可为实际工程相关应用提供参考。

关键词: GFRP管, ECC, 轴压性能, 延性, 承载力计算

Abstract: To investigate the axial compression performance of square GFRP tube-circular stirrup double-constrained fiber-reinforced concrete columns, six composite columns were designed and subjected to axial compression tests. The failure states of the fiber-reinforced composite columns under axial compression were observed, and the effects of different fiber content and stirrup spacing on the axial compression performance of the composite columns were analysed based on load-displacement curves. A theoretical formula for calculating the axial compression capacity of fiber-reinforced composite columns was proposed. The results indicate that, under the same stirrup spacing, as the fiber content increases, both the ultimate bearing capacity and ductility of the composite columns increase to varying degrees. Compared to composite columns with a fiber content of 1%, those with a fiber content of 1.5% exhibit an increase in ultimate bearing capacity by 12.4% to 14.3% and an increase in ductility by 24.6% to 36.8%. Furthermore, under the same fiber content, as the stirrup spacing increases, the ultimate bearing capacity and ductility of the composite column specimens decrease to varying degrees.Finally, based on the calculation formula of axial compression bearing capacity proposed in this paper, the calculation results are in good agreement with the test results, which provides a reference for the engineering applications related to real-world engineering applications.

Key words: GFRP tube, ECC, axial compression performance, ductility, load-bearing capacity calculation

中图分类号:

TB332

张云峰, 许耀祥, 马锦辉, 李炳君, 滕振超, 王桐. GFRP-圆形箍筋双约束ECC混凝土柱的轴压性能[J]. 复合材料科学与工程, 2026, 0(8): 88-95.

ZHANG Yunfeng, XU Yaoxiang, MA Jinhui, LI Bingjun, TENG Zhenchao, WANG Tong. Axial compression performance of GFRP-reinforced circular stirrup double-constrained ECC concrete columns[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(8): 88-95.

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