CFRP-钢管混凝土构件轴压承载力灰熵关联度分析

为进一步研究CFRP-钢管混凝土组合结构构件的力学性能,以极限承载力为测试指标,分析了极限承载力各相关影响因素的作用规律。以试验数据和理论公式为基础,利用灰熵关联度理论,论证了不同厚度的CFRP筒约束情况下,钢管厚度、屈服强度和核心混凝土截面尺度等因素在提高组合结构构件极限承载力方面贡献的主次关系。结果表明：灰关联熵理论是一种简单实用的分析方法,可用于CFRP-钢管混凝土组合结构极限承载力的多因素关联度评价；CFRP-钢管混凝土结构极限承载力各关联因素的贡献大小受CFRP约束效应的影响。研究结论可为CFRP-钢管混凝土组合结构各材料占比的有效优化提供参考。

Study on Grey Entropy Eorrelation Degree of the Bearing Capacity of Concrete filled CFRP- Steel Tube under Axial Compression

To study the mechanical property of concrete filled CFRP- steel tubular structure, the ultimate bearing capacity was as the test index and the influence regularity of relative factors was analyzed. Based on the test datas and theoretical equation, the primary and secondary relations of various factors under the CFRP confining with different thickness, including the thickness and yield strength of steel tube and sectional area of core concrete, were demonstrated by the grey entropy correlation degree theory. The results indicate that the grey relation entropy theory is simple and practical, and can be used to evaluate the contribution degree of various factors associated with the ultimate bearing capacity of composite structure; and the value of contribution degree is affected by the confining effect of CFRP. Besides, the research results can provide reference for the effective optimization of the proportion of each component of composite structure .