Cao Yugui, Zhao Guoxu, Zhang Yang, Hou Can, Mao Ling
Hubei Key Laboratory of Roadway Bridge and Structure Engineering, Wuhan University of Technology, Wuhan 430070, China.
Sanya Science and Education Innovation Park, Wuhan University of Technology, Sanya 572024, China.
Materials (Basel). 2022 Feb 28;15(5):1832. doi: 10.3390/ma15051832.
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.
研究纤维增强聚合物（FRP）约束橡胶混凝土（RuC）的应力-应变关系对其在工程项目中的应用具有重要意义。现有的大多数应力-应变关系模型都是基于圆形截面的FRP约束橡胶混凝土的试验数据建立的，未考虑截面形状的影响。因此，本文首次对FRP约束圆形和方形橡胶混凝土柱的面向分析的应力-应变模型进行了研究。通过收集文献中的235个试验数据，建立了一个包含橡胶颗粒含量和截面形状对FRP约束橡胶混凝土峰值应力-峰值应变及轴-横向应变关系影响的数据库。通过修改现有FRP约束普通混凝土应力-应变关系模型中的关键参数，建立了FRP约束圆形和方形柱RuC的统一应力-应变关系模型。对所提出的模型进行了验证，证明了模型具有良好的精度。
