EXPERIMENT STUDY ON THE INFLUENCE FACTORS OF THERMAL STRESS OF BUILDING STEEL ELEMENTS

摘要：

　　Most of steel structures are statically indeterminate structures.The compositions of a structure will give rise to thermal stress when exposed to non-uniform temperature.Thermal stress has grate influence on the resistance capability of members under fire conditions,which must be taken into account in a steel structural fire design and assessment.On the basis of literature analysis,the influence factors of thermal stresses of axial-restrained steel columns were pointed out.They were temperature increment,end restraint stiffness,slenderness ratio and initial stress ratio.A series of tests were carried out to study the thermal stress of axial restrained steel columns.The results showed that:The relationship between temperature increment of columns and its thermal stresses was a linear relation.The higher the temperature,the greater the thermal stress.Before buckling,the axial thermal stress increased with the increasing of restraint stiffness and slenderness ratio.Initial stress ratio was insensitive to thermal stress.

关键词： Steel columns thermal stress temperature increment end restraint stiffness slenderness ratio initial stress

作者: Hongrui Yang

作者单位: Department of Fire Commanding, Chinese Peoples Armed Police Academy, HeBei Langfang 065000, P.R.China

会议类型: 国际会议

会议名称: The Twelfth International Symposium on Structural Engineering (第十二届结构工程国际研讨会)

会议地点: 武汉

会议语种:英文

页码: 897-901

在线出版日期: 2012-11-17（万方平台首次上网日期，不代表论文的发表时间）