异形截面抗弯刚度的等效方法研究  

EQUIVALENT METHOD OF FLEXURAL STIFFNESS AT SPECIAL-SHAPED SECTION

作　　者：费建伟 杨红亮 夏伟平 李志安 孙孟海 FEI Jianwei;YANG Hongliang;XIA Weiping;LI Zhian;SUN Menghai(Zhejiang Zhongnan Construction Group Steel Structure Co.,Ltd.,Hangzhou 310052,China)

机构地区：[1]浙江中南建设集团钢结构有限公司,杭州310052

出　　处：《低温建筑技术》2020年第6期96-99,共4页Low Temperature Architecture Technology

摘　　要：文中通过解析和迭代的方法,把钢管混凝土异形截面的刚度等效为矩形钢管混凝土截面刚度,推出截面刚度等效公式,求出等效矩形钢管混凝土截面钢管的长度b,宽度a和厚度t。取6组钢管混凝土异形截面进行计算,通过SAP2000有限元软件进行分析,结果表明每组里钢管混凝土异形截面梁与等效矩形钢管混凝土截面梁的跨中挠度基本相同,最大误差小于3%。说明这种刚度等效方法计算精度很高,对钢管混凝土异形截面受力计算具有一定的参考价值。Using analytical and iterative methods,the stiffness of the special-shaped cross-section of the concrete-filled steel tube is equivalent to the rigidity of the cross-section of the rectangular steel-tube concrete.To verify the accuracy,six sets of special-shaped cross-sections of concrete-filled steel tube are used for calculation.Furthermore,the same length is used as a simple-supported beam and analyzed by SAP2000 finite element software.The results show that the mid-span deflection of the concrete-shaped steel tube concrete shaped cross-section beam and the equivalent rectangular steel-tube concrete cross-section beam in each group is basically the same,and the maximum error Less than 3%.It indicate that the calculation method of this stiffness equivalent method has the high calculation accuracy,and it has certain reference value for the calculation of the stress of the special-shaped section of the concrete-filled steel tube.

关 键 词：截面抗弯刚度 异形截面 解析法 矩形钢管混凝土 

分 类 号：TU311[建筑科学—结构工程]