CFRP约束混凝土棱柱体的应力-应变关系研究

Research on Stress-strain Relationship of Concrete Prism Confined by Carbon Fiber Sheets

通过8组CFRP布约束混凝土棱柱体试件的轴心受压试验,研究其受力性能。通过分析碳纤维布加固量、粘贴方式、纤维布条带宽度和间距等不同试验参数对约束效果的影响,推导验证CFRP约束混凝土棱柱体的应力-应变关系模型。分析结果表明:各种形式碳纤维包裹的混凝土棱柱体的承载力都有一定程度的提高,延性增大。

The properties of CFRP confining concrete column through eight groups columns subjected to axial loading;various design parameters,such as amounts of CFRP sheets,width of straps and spacing of straps,have been considered.Based on the test results,deducing and validating the stress-strain relationship model of CFRP confining concrete prism.The analyses results are： The axial compressive strength and ductility of concrete prism wrapped by CFRP sheets or CFRP straps have all increased to a certain degree.