Unified Stress–Strain Model of FRP-Confined Square and Circle Rubber Concrete Columns |
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| Authors: | Yugui Cao Guoxu Zhao Yang Zhang Can Hou Ling Mao |
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| Affiliation: | 1.Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China; (Y.C.); (G.Z.); (Y.Z.); (C.H.);2.Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572024, China;3.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | Studying the stress–strain relationship of fiber-reinforced polymer (FRP)-confined rubber concrete (RuC) plays an important role in its application in engineering projects. Most of the existing stress–strain relationship models are established based on the test data of FRP-confined rubber concrete with circular cross-sections, and the effect of the section shape is not considered. Therefore, an analysis-oriented stress–strain model of FRP-confined circular and square rubber concrete columns was studied in this paper for the first time. A database that includes the rubber particle content and section shape on the peak stress-peak strain and axial–lateral strain relationship of FRP-confined rubber concrete was established by collecting 235 test data from the literature. By modifying the key parameters in the existing FRP-confined normal concrete stress–strain relationship model, a unified stress–strain relationship model of FRP-confined RuC with circular and square columns is established. The proposed model is verified, and a good accuracy of the model is proven. |
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| Keywords: | FRP, rubber concrete, stress– strain relationship, analytical model, confined concrete |
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