变电构架受损伤圆钢管杆件轴压极限承载力分析  

COMPUTATIONAL ANALYSIS OF THE ULTIMATE BEARING CAPACITY OF DAMAGED TUBULAR MEMBERS IN POWER TRANSFORMATION STRUCTURES

作　　者：张猛[1] 张凯[1] 张哲[1] 李天[2] 赵林 

机构地区：[1]同济大学建筑工程系,上海200092 [2]郑州大学土木工程学院,郑州450002

出　　处：《工业建筑》2006年第z1期403-407,共5页Industrial Construction

基　　金：国家"十五"科技攻关项目(2002BA806B-4-3);河南省教育厅自然科学基金资助项目(20015600011)

摘　　要：以电力构架中常用的圆钢管杆件为研究对象,采用有限元计算和试验数据建立的回归模型方法,研究一般受损条件下杆件轴压极限承载力的变化情况。分析了凹陷深度、初弯曲、长细比和截面径厚比等参数对杆件极限承载力的影响,讨论了上述参数对荷载-轴向缩短关系的单独影响和综合影响。了解了多杆件极限承载力的特点,引入了受损杆件的折算刚度系数。所得结论为变电构架的可靠性分析和维修加固提供了依据。It is studied damaged tubular members,which are widely used in power transformation structures,through a regression model.The following parameters,dent-depth,initial crook,slenderness ratio and diameter-thickness ratio,are considered and their influence on ultimate bearing capacity is analyzed.Both separate influence and combined influence of the above four parameters on load-shortening relationship are also discussed.Ultimately,a coefficient of the equivalent stiffness is introduced.The results provide a theoretical foundation for the reliability analysis and reinforcement of power transformation structures.

关 键 词：电力构架 回归模型 凹陷损伤 圆钢管杆件 极限承载力 荷载-轴向缩短关系 

分 类 号：TU392.3[建筑科学—结构工程]