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Abstract Based on the cohesive zone model (CZM), the numerical analysis method and model of the axial compression performance of fiber reinforced composite material (FRP) confined hollow concrete filled steel tube composite columns was investigated and compared with the experimental results to verify the validity of the numerical model. The influence of the main design parameters on the axial compression performance of the composite column was discussed. The results show that CZM is suitable for investigating the FRP bonding interface performance of FRP-constrained hollow concrete-filled steel tube composite columns. The bearing capacity of structure can be increased by the increasing of concrete strength level, FRP layers number and steel pipe thickness, while the lateral deformation of FRP bonding layer may be increased, which can increase the risk of FRP cracking. Under the same conditions, carbon fiber composite material (CFRP) is more conducive to improving the mechanical properties of structure than glass fiber composite material (GFRP). The geometric shape of the inner boundary of FRP-constrained hollow concrete-filled steel tube composite column has important influence on the structural performance. Improving the smoothness of the inner boundary can optimize the internal stress distribution of the structure to increase the bearing capacity.
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Received: 16 July 2020
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2022, Vol. 43 
