Effect of coarse and fine rubber aggregate content on stress-strain relationship of FRP confined rubber concrete
CAO Yugui1,2， XUAN Zhiying1， XIE Qinghua3， LI Heng4
1. Hubei Key Laboratory of Roadway Bridge and Structure Engineering， Wuhan University of Technology， Wuhan， Hubei 430070， China； 2. Sanya Science and Education Innonation Park, Wuhan University of Technology， Sanya， Hainan 572025, China； 3. China Gezhouba Group Investigation & Design Co., Ltd.， Wuhan， Hubei 430000， China； 4. China Municipal Engineering Northwest Design and Research Institute Co., Ltd.， Lanzhou， Gansu 730000， China
Abstract：To investigate the effects of volume replacement rate of rubber coarse and fine aggregates on the stress-strain curve, the concept of volume replacement rate of rubber coarse and fine aggregates was defined. By collecting 110 existing experimental stress-strain curves from published literatures, the effects of rubber coarse and fine aggregate volume replacement rate on the key parameters of stress-strain relationship of fiber reinforced polymer(FRP) confined rubber concrete with different sections were analyzed. Based on the analysis results, the stress-strain relationship model and compressive strength model of FRP confined rubber concrete were established. The factor effects of the volume replacement rate of rubber coarse and fine aggregates and the cross-sectional shape of rubber concrete were considered in the proposed models. The model evaluation results show that the compressive strength ratio of FRP confined rubber concrete is increased with the increasing of the volume replacement rate of rubber coarse and fine aggregates, the FRP confinement stress ratio and the cross-sectional corner radius ratio. The proposed compressive strength model can accurately predict the compressive strength of FRP confined rubber concrete with rubber particles replacing part of fine aggregate or coarse and fine aggregate, and the average error value is 1.03. The predicted curves of the proposed stress-strain model are consistent with the experimental stress-strain curves of FRP confined rubber concrete.
曹玉贵1,2， 铉志莹1， 谢青华3， 李恒4. 橡胶粗细集料含量对FRP约束橡胶混凝土应力-应变关系的影响[J]. 江苏大学学报（自然科学版）, 2024, 45(5): 598-605.
CAO Yugui1,2， XUAN Zhiying1， XIE Qinghua3， LI Heng4. Effect of coarse and fine rubber aggregate content on stress-strain relationship of FRP confined rubber concrete[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2024, 45(5): 598-605.
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2024, Vol. 45 
