方中空夹层钢管混凝土压扭构件承载力计算方法研究  

Study on calculation method of bearing capacity for concrete-filled double-walled steel tubular columns under compression and torsion

作　　者：郭立湘 李婷[2] 杨建[3] 黄宏[2] 

机构地区：[1]江西杭萧钢构有限公司,江西南昌330013 [2]华东交通大学土木建筑学院,江西南昌330013 [3]青岛理工大学(临沂)土建工程系,山东临沂273400

出　　处：《铁道建筑》2014年第7期4-7,共4页Railway Engineering

基　　金：国家自然科学基金资助项目(51008122;51378206);江西省青年科学家培养对象计划项目(20133BCB23015);江西省教育厅科技计划落地项目(赣财教(2011)243号)

摘　　要：在有限元计算结果得到既有试验结果验证的基础上,采用有限元法分析各参数对方中空夹层钢管混凝土压扭构件T/Tu-N/Nu相关曲线的影响。分析表明,长细比变化时对T/Tu-N/Nu相关曲线影响较显著,而内外钢管强度、混凝土强度、空心率、内管径厚比和名义含钢率变化时对其影响不明显。在此基础上,提出了方中空夹层钢管混凝土压扭构件承载力简化计算方程,将简化计算值与有限元计算值、试验值进行比较,吻合良好,可为工程设计提供参考。Based on the existing experimental result verification by finite element calculation,this paper analyzed the influence of the parameters on the normalized T/Tu -N/Nu correlation curves of concrete-filled double-walled steel tube （ CFDST） members under compression and torsion. The results indicated that the slenderness ratio has a significant effect on T/Tu - N/Nu correlation curves,while the other parameters such as yield strength of outer or inner steel tube,concrete cube strength,hollow ratio, thickness ratio of inner steel tube and nominal steel ratio have little effect on the correlation curves. According to the results,this paper proposed the simplified calculation equation for the bearing capacity of CDFST members under combined compression and torsion and the simplified calculation results agree well with the experimental and test results calculated by the finite element method,which means the method presented in this paper could provide a good reference for engineering design.

关 键 词：中空夹层钢管混凝土 压扭 有限元 承载力 

分 类 号：TU398.9[建筑科学—结构工程]