钢管混凝土构件抗弯刚度折减系数的回归分析  

REGRESSION ANALYSIS OF THE REDUCTION FACTOR OF CONCRETE-FILLED STEEL TUBULAR MEMBER'S BENDING RIGIDITY

作　　者：吴乃森[1] 吴志坤[1] 赵艳艳[1] 王元生[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710129

出　　处：《工业建筑》2012年第8期144-148,共5页Industrial Construction

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。To reflect more intuitively steel and concrete＇ s contributions to total bending rigidity of concrete-filled steel tubular（ CFST）, bending mechanical property of five CFST free beams were tested, the results and other test results from relevant literatures were handled with linear regression method to research the reduction factor of superposition theory which can be used to calculate CFST bending members＇ bending rigidity. The result showed concrete in rectangular and circle CFST had greater contribution to total bending rigidity than that in square CFST. Finally, the application scope of several common standards was discussed according to the regression results.

关 键 词：钢管混凝土 受弯力学性能 线性回归 抗弯刚度 折减系数 

分 类 号：TU398.9[建筑科学—结构工程]