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This paper presents the test results of eight basalt fibre-reinforced polymer (BFRP) composite lightly confined concrete columns with strength enhancement ratios less than 1.5. The test results indicate that the number of fibre layers and bond type are the main driving parameters of confined concrete behaviour. The quantity of FRP was found to control the confined concrete strength regardless of bond type, while the introduction of a debonding layer between the concrete core and FRP jacket significantly increased the FRP strain utilisation and concrete compressive strain capacity. Hence, unbonded FRP confined concrete can provide an option for maximising concrete deformability for a given strength enhancement requirement.

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Axial Behaviour of Concrete Columns Lightly Confined with Bonded and Unbonded BFRP Wraps

  • 会议论文

  • 发表日期：

    2026年

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  • Xin Wang,
  • Scott T. Smith,
  • Phillip Visintin,
  • T. Tafsirojjaman

摘要

This paper presents the test results of eight basalt fibre-reinforced polymer (BFRP) composite lightly confined concrete columns with strength enhancement ratios less than 1.5. The test results indicate that the number of fibre layers and bond type are the main driving parameters of confined concrete behaviour. The quantity of FRP was found to control the confined concrete strength regardless of bond type, while the introduction of a debonding layer between the concrete core and FRP jacket significantly increased the FRP strain utilisation and concrete compressive strain capacity. Hence, unbonded FRP confined concrete can provide an option for maximising concrete deformability for a given strength enhancement requirement.