纤维铺设角度对FRP-混凝土组合柱承载力影响的有限元分析

Finite element analysis of effect of fiber orientation on bearing capacity of FRP-concrete composite column

在已有实验的基础上,为研究不同纤维铺设角度对轴压FRP管-混凝土短柱的极限承载力的影响,进行了有限元分析,得到纤维铺设角度分别为0°,45°,90°的FRP管-混凝土短柱的应力云图,其形态与相关文献中的实验结果比较接近,验证了有限元分析方法的合理性;为进一步研究组合柱承载力的影响因素,分别以小纤维铺设角度、纤维铺设层数、混凝土强度为参数,得到了组合柱的荷载-应变曲线.曲线表明:随纤维铺设角度和纤维铺设层数的增大以及混凝土强度的提高,组合柱的承载力均有变化,对深入研究FRP管-混凝土柱的受力性能和约束机理提供了一定的参考.

Based on the existing experiment,finite element analysis is conducted to study the effect of fiber orientation on ultimate bearing capacity of FRP tube-concrete short column,and the result from finite element contains stress pictures from fiber orientations of 0°,45°,90°of FRP tube-concrete short column,which are similar to experimental results of pertinent literature,verifying the rationality of analytical method;in order to study influencing factors of bearing capacity more,and that considering small fiber orientation,fiber layer,concrete strength as parameters,the data calculated by finite element shows relevant load-strain curves.These curves indicate that with the improvement of fiber orientation,fiber layer and concrete strength,the bearing capacity of composite column changes,and provide certain reference for further research of structural behavior and constraint mechanism of FRP tube-confined concrete column.