ULTIMATE MOMENT OF CONCRETE-FILLED CIRCULAR STEEL TUBES UNDER PURE BENDING

摘要：

The section stresses of concrete-filled circular steel tubes under pure bending at limit state were analyzed. The longitudinal stress of concrete increases considering the concrete confined by the steel tubes in the compressive area; at the same time,the longitudinal stress of steel tube is less than the transverse stress due to the confinement effect. In the tensile area,due to the restriction effect from concrete to the steel tube,the longitudinal yield strength of steel tubes increases. According to the calculation model of the composite section at limit state,static equilibrium equations were listed,and then the formula for ultimate moment was presented and simplified reasonably. The accurate calculation results and the approximate calculation results of 59 bending specimens from references were analyzed,which show that both the accurate calculation results and the approximate calculation results are in good agreement with the test ones from references. Besides,the calculation results by simplified formula are also in good agreement with that by regression formula based on fiber model method from references.

关键词： Concrete-filled circular steel tube Pure bending member Ultimate moment Limit equilibrium method

作者: Fa-Xing Ding Qing-Xiang Pan Zhao-Hui Lu Zhi-Wu Yu

作者单位: School of Civil Engineering and Architecture,Central South University,Changsha,410075,P.R. China School of Civil Engineering and Architecture,Central South University,Changsha,410075,P.R.China

会议类型: 国际会议

会议名称: The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)

会议地点: 广州

会议语种:英文

页码: 552-556

在线出版日期: 2010-12-01（万方平台首次上网日期，不代表论文的发表时间）