离心钢管混凝土长柱轴压性能分析  

Analysis of Axial Centrifugal Concrete Filled Steel Tubular Long Columns under Axial Compression

作　　者：曹玉娟[1] 娄晨光 赵锐 戴良军[2] 陈刚[2] CAO Yujuan;LOU Chenguang;ZHAO Rui;DAI Liangjun;CHEN Gang(School of Civil and Hydraulic Engineering, Hefei University of Technology,Hefei 230009,China;Anhui Construction Engineering Group Limited Company,Hefei 230001,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]安徽建工集团有限公司,安徽合肥230001

出　　处：《安徽建筑大学学报》2019年第3期10-15,共6页Journal of Anhui Jianzhu University

摘　　要：针对离心钢管混凝土长柱,运用ABAQUS有限元软件进行模拟,采用正交试验的分析方法,研究钢管壁厚、空心率及长细比对长柱轴压承载力的影响,结果表明,各因素影响能力顺序为:钢管壁厚>空心率>长细比。钢管壁厚每增加1mm,承载力增加约17%;空心率每增加0.08,承载力减少约9%;长细比每增加10,承载力降低幅度均小于1%。将有限元计算结果与现有相关规范中的叠加理论和统一理论计算结果比较表明,理论计算值较有限元模拟值偏小7%~9%。工程运用中选用统一理论进行计算,更偏于安全。Aiming at the long column of centrifugal concrete filled steel tube,ABAQUS finite element software and orthogonal test method are used to study the influence of the wall-thickness,hollow ratio and slenderness ratio of steel tube on the axial compression bearing capacity of long column. The results show that the order of influencing capacity of each factor is:wall-thickness > hollow ratio > slenderness ratio. For every 1 mm increase in wall thickness,the bearing capacity increases by about 17%;for every 0.08 increase in hollow ratio,the bearing capacity decreases by about 9%;for every 10 increase in slenderness ratio,the reduction of compression bearing capacity is less than 1%. Comparing the results of FEM calculation with those of superposition theory and unified theory in existing specification,it is shown that the theoretical calculation value is 7%~9% larger than that of FEM simulation value. Unified theory is chosen to calculate in engineering application,and it is much Safer.

关 键 词：离心钢管混凝土长柱 有限元分析 轴压承载力 正交试验 参数分析 

分 类 号：TU398.9[建筑科学—结构工程]