CFRP-混凝土-钢管组合柱轴心受压性能的有限元分析

采用有限元方法对碳纤维增强塑料(CFRP)-混凝土-钢管组合柱轴心受压性能进行了分析.结果表明,通过合理选择材料的本构模型和单元类型,有限元方法可以较好对组合柱的性能进行分析和评价.同时表明,该新型的组合柱有较大的强度和较好的延性,且各部分受力特性充分利用各材料承力特性,发挥各自的优点,具有很好的力学性能.本文并对钢管和CFRP的应力发展和轴向应力沿径向分布进行了分析,最后经线性拟舍得到核心混凝土的强度和极限应变表达式.

Research on Behavior of Hybrid CFRP-concrete-steel Double Skin Tubular Columns

The axial compression behaviors of hybrid CFRP-concrete-steel double skin tubular columns are studied in the paper. The finite element method is used in the analysis. The results indicate that, finite element method can be well used in analyzing and estimating the behavior of hybrid columns basing on selecting constitutive laws of materials and element types properly. They also indicate that this new type of hybrid columns have high strength and good ductility, they take full advantage of each material behavior, and have very good mechanical behaviors. The paper also study stress development of steel tube and CFRP and the axial stress distribution of core concrete. Finally, strength and limit strain formulas are fitted.