Abstract
To analyze the influence of CFRP (Carbon Fiber Reinforced Polymer) reinforcement ratio and CFRP sheet on the self-centering performances of concrete circular columns, five concrete circular columns were tested under the low-cyclic reversed load in this work. The five concrete circular columns included 1 RC (Reinforced Concrete) column, 2 CFRP bars reinforced concrete circular columns and 2 CFRP bars reinforced concrete circular columns with CFRP sheet strengthening partially. The hysteretic curves, skeleton curves, stiffness degradation, strength degradation, residual deformations, energy dissipation and ductility of the five circular columns were obtained and analyzed to verify the improvement of the seismic performances of the specimens reinforced with CFRP bars and CFRP sheets. At the same time, the reference opinions for practical applications of CFRP bars and CFRP sheets in structures can be provided. The test results showed that the bearing capacity and deformation capacities of the concrete circular columns reinforced with CFRP bars were 25.5% and 25% higher than that of the RC column, respectively. The deformation capacities, energy consumption capacities and deformation recovery capacities of CFRP bars reinforced concrete circular columns with CFRP sheet strengthening partially were 21.5%, 40% and 78.5% higher than that of the RC column, respectively.
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Data Availability
The datasets generated during and analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
Experimental work described in this paper was financially supported by the National Natural Science Foundation of China (Grant No. 12002317), the National Key R&D Program of China (2016YFE0125600), Program for Innovative Research Team of Education Ministry of China (IRT_16R67), Thousand Talents Plan in Henan Province (ZYQR201912029), and Key Science and Technology Program of Henan Province (212102310003).
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Conceptualization: Jun Zhao, Xiaohui Ruan, Xinglong Gong; Methodology: Jun Zhao, Wenbo Ren, Chenzhe Si; Formal analysis and investigation: Wenbo Ren, Xiaohui Ruan, Chenzhe Si; Writing - original draft preparation: Jun Zhao, Wenbo Ren, Xiaohui Ruan; Writing - review and editing: Jun Zhao, Xiaohui Ruan; Funding acquisition:Jun Zhao, Xiaohui Ruan; Supervision: Jun Zhao, Xiaohui Ruan.
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Zhao, J., Ren, W., Ruan, X. et al. Experimental Study on the Seismic Performance of Columns Reinforced by the CFRP Bar and Sheet. Appl Compos Mater 28, 1291–1313 (2021). https://doi.org/10.1007/s10443-021-09914-x
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DOI: https://doi.org/10.1007/s10443-021-09914-x