Axial compression performance of GFRP-reinforced circular stirrup  double-constrained ECC concrete columns

doi:10.19936/j.cnki.2096-8000.20260828.011

Abstract

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

CLC Number:

TB332

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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Axial compression performance of GFRP-reinforced circular stirrup double-constrained ECC concrete columns

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