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REGRESSION ANALYSIS OF THE REDUCTION FACTOR OF CONCRETE-FILLED STEEL TUBULAR MEMBER'S BENDING RIGIDITY
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摘要: 为了更直观地研究钢管混凝土构件中钢管和混凝土对整体抗弯刚度的贡献,进行了5根矩形钢管混凝土简支梁的受弯试验,并结合相关文献中的试验结果,运用线性回归的方法对钢管混凝土受弯构件抗弯刚度叠加理论中的折减系数进行研究。发现矩形和圆形钢管混凝土构件中混凝土对整体抗弯刚度的贡献优于方形截面钢管混凝土构件中的混凝土。最后,根据回归结果讨论了几个常用规范的使用范围。Abstract: To reflect more intuitively steel and concrete' s contributions to total bending rigidity of concrete-filled steeltubular( CFST), bending mechanical property of five CFST free beams were tested, the results and other test resultsfrom relevant literatures were handled with linear regression method to research the reduction factor of superpositiontheory which can be used to calculate CFST bending members' bending rigidity．The result showed concrete inrectangular and circle CFST had greater contribution to total bending rigidity than that in square CFST．Finally, theapplication scope of several common standards was discussed according to the regression results．
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