Steel and Composite Structures

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Interfacial behavior of segmental concrete-filled Basalt FRP tube under cyclic loading

  • Sun, Yuehan (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Deng, Kailai (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Zhan, Yulin (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Huang, Wenfeng (Department of Bridge Engineering, Southwest Jiaotong University) ;
  • Yin, Chao (Department of Bridge Engineering, Southwest Jiaotong University)
  • Received : 2021.02.04
  • Accepted : 2021.06.11
  • Published : 2021.07.10
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Abstract

A segmental concrete-filled basalt fiber-reinforced polymer (BFRP) tube was proposed, whose lightweight characteristic promoted convenient bridge column transportation and construction. A special connecting component between the adjacent BFRP segments ensured effective transfer of sectional forces. Four specimens, including three segmental specimens and one comparative integral concrete-filled BFRP tube, were tested to investigate the mechanical performance of the BFRP tube under cyclic loading. Damage patterns, load-deformation response, and strain development were observed, showing that the segmental concrete-filled BFRP tube presented satisfactory load-carrying and deformation capacities. Further, the connecting component effectively guaranteed a satisfactory hysteretic performance. Based on the test results, the overall load-carrying capacity was mainly determined by the moment resistance of the interface. Furthermore, the segmental structure weakened the confining effect on the core concrete, though applying multiple stirrups could compensate for the reduced confining effect. Finally, design methods were proposed for the connecting component.

Keywords

Acknowledgement

The research described in this paper was financially supported by The National Key Research and Development Program of China (No. 2016YFB1200401), The National Natural Science Foundation of China (Nos. 52078436 and 51878564), Supported by Sichuan Science and Technology Program (Grant 2021JDTD0012) and Supported by Sichuan Science and Technology Program (Grant 20GJHZ0183).

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