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为了研究FRP(纤维增强复合材料)约束钢骨高强混凝土(SRHC)柱的轴压比限值以及对其有影响的参数,文章利用突变理论的特性和优点,对FRP约束SRHC柱的含钢率和轴压比限值的关系进行分析论证,建立了一个考虑含钢率、轴压比限值和构件性质的尖点突变模型,通过已有试验数据确定参数α、β、γ的值以及含钢率系数k值。根据已有试验数据计算出的F值与理论值比较接近。计算结果表明,以尖点突变模型拟合ρ-n-R之间的关系与实际吻合良好,可对FRP包裹SRHC柱的轴压比限值进行初步预测。
In order to study the limit values of axial compression ratio (SRP) of steel reinforced high-strength concrete (SRHC) columns with FRP and its influencing parameters, this paper makes use of the characteristics and advantages of mutation theory, And the relationship between the limit values of axial compression ratio, a cusp catastrophe model considering the steel inclusion ratio, the axial compression ratio limit and the components’ properties was established. The values of the parameters α, β, γ and Steel rate coefficient k value. Based on the available experimental data, the calculated F value is close to the theoretical value. The calculated results show that the relationship between ρ-n-R and ρ-n-R fitted by cusp catastrophe model is in good agreement with the actual one. The axial compressive ratio limits of FRHC wrapped SRHC column can be predicted.