三种类型钢变电构架考虑二阶效应的受力性能比较  

Behavior comparison of three types of steel structural gantries of switchyard considering second-order effect

作　　者：李天[1] 咸庆军[2] 尚瑞娟[3] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]同济大学建筑工程系,上海200092 [3]河南建筑职业技术学院,河南郑州450007

出　　处：《四川建筑科学研究》2010年第6期39-42,共4页Sichuan Building Science

摘　　要：对双侧、单侧及无侧向支撑的三种两跨人字形钢结构变电构架在导线荷载作用下进行了考虑结构二阶效应的受力性能分析。分析中考虑了构架柱的初始几何缺陷,加载过程分别考虑了几何非线性、材料非线性以及两种非线性因素共同作用对变电构架受力性能的影响。通过分析对比三种类型变电构架在考虑各种影响因素下的受力性能,找出了它们的二阶效应特点以及侧向支撑的作用特点。This paper analyses the behavior of three two-span character shaped steel structural gantries of switchyard with two lateral supports,one unilateral support and no lateral supports bearing wire loads considering second-order effect of the structure.Initial geometrical imperfection of gantry column is considered in the analysis,and geometrical nonlinearity,material nonlinearity and the two are considered separately in the loading process.The characteristics of second-order effect and action of lateral support have been found through behavior analysis and comparison of three types of gantries of switchyard considering different factors.

关 键 词：钢结构变电构架 侧向支撑 二阶效应 荷载—位移曲线 极限承载能力 

分 类 号：TU391[建筑科学—结构工程]