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.
出处
《工业建筑》
CSCD
北大核心
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)
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
power transformation structures regression model dent-damage tubular members ultimate bearing capacity load-shortening relationship
