偏心率对CFRP钢管约束混凝土柱力学性能的影响

Effect of Eccentricity Ratio on Mechanical Properties of CFRP Steel Tube Confined Concrete Column

为研究偏心率对碳纤维复合材料(Carbon Fiber Reinforced Polymer,CFRP)布加固钢管混凝土柱力学性能的影响规律,借助有限元软件ABAQUS对偏心率为0. 3%、0. 6%、0. 9%和1. 2%的构件分别进行数值模拟。结果表明:随着偏心率的增大,被动约束的紧箍力减小;偏心率对构件的荷载挠度曲线影响比较大,对于偏心率大的构件,其极限承载力较小;不同偏心率对于不同长细比的构件影响不同,长细比为28时,构件的承载力相应地整体降低。

In order to study the influence of eccentricity rate on the mechanical properties of CFRP reinforced concrete filled steel tubular column,the finite element software ABAQUS was used to simulate the components with eccentricity rate of 0. 3%,0. 6%,0. 9% and 1. 2% respectively. The results show that with the increase of eccentricity,the tightening force of passive restraint decreases. Eccentricity has great influence on the load deflection curve of components,and the ultimate bearing capacity of components with high eccentricity is small. Different eccentricity has different effects on components with different slenderness ratios. When slenderness ratio is 28,the bearing capacity of components decreases correspondingly.