单侧支撑钢变电构架二阶效应分析  

SECOND-ORDER EFFECT ANALYSIS OF STEEL STRUCTURAL GANTRY FOR SUBSTATION WITH A UNILATERAL SUPPORT

作　　者：李天[1] 成庆军[1] 薛亚辉[1] 

机构地区：[1]郑州大学土木工程学院,郑州450002

出　　处：《工业建筑》2008年第z1期532-534,467,共4页Industrial Construction

基　　金：河南省电力公司科技攻关项目

摘　　要：为了找出单侧侧向支撑两跨人字形钢变电构架的二阶效应特点及影响因素,分析中考虑了构架柱的几何缺陷,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。通过分析对比导线张力、水平荷载以及竖向荷载作用下的3条荷载-位移曲线可知:变电构架在导线张力和水平荷载作用下,受材料非线性较二阶效应的影响大;而在竖向荷载作用下,受二阶效应较材料非线性的影响大。It is analysed the behavior of two-span character shaped steel structural gantry for substation with a unilateral support considering second-order effect of the structure.Geometrical imperfection of structural gantry column is considered in the analysis,and geometrical nonlinearity,material nonlinearity and the two are considered separately in the loading process,but these factors have different impacts on the behavior of structural gantry for substation.The characteristic of second-order effect and important factors have been found through analysis and comparison of three load-displacement curves,which are obtained from three kinds of loads containing tension of wire,level loads and vertical loads.

关 键 词：钢结构变电构架 二阶效应 材料非线性 荷载一位移曲线 极限承载能力 

分 类 号：TU391[建筑科学—结构工程]