高强箍筋约束高强混凝土方柱轴压性能数值试验研究

Numerical and Experimental Research on High-strength Stirrup Confined High-strength Concrete Square Columns under Concentric Compression

约束混凝土构件已成为国内外学者的研究热点。为了研究各关键因素对高强箍筋约束高强混凝土轴压短柱受力性能的影响,首先介绍三种极具代表性的约束混凝土模型;其次,基于10组高强箍筋约束高强混凝土方柱轴压试验,采用ABAQUS进行数值模拟,计算并分析箍筋强度、配箍率等因素对约束混凝土构件受力性能的影响。研究结果表明:数值模拟结果与试验结果吻合较好,借助高强度箍筋来约束高强混凝土来提高构件的极限承载力和变形性能十分有效,为高强箍筋在混凝土结构中进一步拓展应用提供理论依据。

Confined concrete component has become the research hotspots studied by scholars at home and abroad. In order to study the mechanical performances of high-strength stirrup confined high-strength concrete square column on different influence factors,3 most representative confined concrete models were introduced. And then,based on 10 concentric compression tests of high-strength stirrup confined high-strength concrete square columns,the influence of different stirrup strength,different stirrup ratio,different stirrup spacing and different stirrup forms on the mechanical properties of confined concrete square columns were simulated and analyzed by adopting ABAQUS. The results indicate that numerical simulation results are in good agreement with experimental ones. The high-strength stirrup can effectively improve ultimate bearing capacity and deformation performance of concrete columns,which would provide the theoretical foundation for the applications of high-strength stirrups in concrete structures.