Experimental investigation on axial compressive performance of GFRP pipe-restrained reinforced concrete columns after freeze-thaw cycles

doi:10.19936/j.cnki.2096-8000.20260328.010

Abstract

Abstract: To explore the axial compressive behavior of reinforced concrete columns confined by fiber-wrapped glass fiber reinforced polymer (GFRP) tubes, axial compressive tests and finite element simulations were conducted on eight GFRP-confined reinforced concrete cylinders subjected to freeze-thaw cycles. The effects of concrete strength, number of freeze-thaw cycles, and slenderness ratio on the axial compression performance of the composite columns were studied. The results indicate that, under the same number of freeze-thaw cycles, the ultimate bearing capacity of the C60 columns is on average 9% higher than that of the C30 columns. The bearing capacity of the specimens decreases with the increase in freeze-thaw cycles, but the degradation rate is slower for the C60 columns than for the C30 columns. Additionally, the influence of slenderness ratio on the stiffness and bearing capacity of the specimens becomes more significant as the number of freeze-thaw cycles increases. A theoretical formula for calculating the axial compressive bearing capacity of GFRP-confined reinforced concrete columns was established, and the calculated results show a high degree of agreement with the experimental data. This study provides a valuable reference for related engineering designs.

Key words: GFRP tube, freeze-thaw cycles, axial compressive performance, finite element analysis, bearing capacity calculation

CLC Number:

TB332

ZHANG Yunfeng, LI Bingjun, DU Zhanxiang, TENG Zhenchao, WANG Tong, XU Yaoxiang. Experimental investigation on axial compressive performance of GFRP pipe-restrained reinforced concrete columns after freeze-thaw cycles[J]. COMPOSITES SCIENCE AND ENGINEERING, 2026, 0(3): 82-91.

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