Axial compressive behavior of GFRP-timber-reinforced concrete composite columns
Fubin Zhang , Hu Luo , Jianzhuang Xiao , Amardeep Singh , Jing Xu , Hai Fang
Low-carbon Materials and Green Construction ›› 2023, Vol. 1 ›› Issue (1) : 5
Axial compressive behavior of GFRP-timber-reinforced concrete composite columns
This paper investigated the compressive behavior of a novel glass fiber reinforced polymer (GFRP)-timber-reinforced concrete composite column (GTRC column), which consisted of reinforced concrete with an outer GFRP laminate and a paulownia timber core. The axial compression tests were performed on 13 specimens to validate the effects of various timber core diameters, slenderness ratios, and GFRP laminate layers/angles on the mechanical behaviors. Test results indicated that with the increase in the timber core diameter, the ductility and energy dissipation ability of the composite column increased by 52.6% and 21.6%, respectively, whereas the ultimate load-bearing capacity and initial stiffness showed a slight decrease. In addition, the GFRP laminate considerably improved the ultimate load-bearing capacity, stiffness, ductility and energy dissipation capability by 212.1%, 26.6%, 64.3% and 3820%, accordingly. Moreover, considering the influence of timber core diameter, an ultimate load-bearing capacity adjustment coefficient was proposed. Finally, a formula was established based on the force equilibrium and superposition for predicting the axial bearing capacity of the GTRC columns.
the China Postdoctoral Science Foundation,(2021M690264)
the Youth Talent Cultivation Program of Jiangsu University,(2020031)
the State Key Laboratory of Special Functional Waterproof Materials,(SKWL-2021KF10)
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