Q460高强钢管径厚比限值试验研究  

Experimental Study on Diameter-Thickness Ratio Limitation of Q460 High-Strength Steel Tubes

作　　者：邢海军[1] 高渊[1] 朱彬荣[1] 

机构地区：[1]中国电力科学研究院,北京100055

出　　处：《中国电力》2012年第8期32-36,共5页Electric Power

摘　　要：当钢管的径厚比超过一定限值时,钢管构件受压时局部屈曲先于整体稳定破坏,使构件不能全面积承载,从而会加速构件整体失稳而丧失承载能力。输电线路中对于大径厚比钢管使用的限制主要以径厚比限值来实现。通过国内外规范对比、18组钢管构件轴心受压试验和理论分析相结合的方法,研究分析了Q460钢管径厚比及其长细比与钢管承载力的内在关系,并得到Q460钢管径厚比限值,该限值的试验验证对目前输电线路钢管塔设计具有指导意义。If the diameter-thickness ratio of steel tubes exceeds a certain limit,local buckling will occur before overall buckling in steel components under pressure,which makes the steel components loose the whole-area weight bearing capability and accelerates the overall instability process.The application of steel tubes with large diameter-thickness ratio in transmission lines is mainly limited by the diameter-thickness ratio.By comparison between domestic and international standards,compression tests on 18 sets of steel axial components and theoretical analysis,the internal relationships between the diameter-thickness ratio,the slenderness ratio and the weight bearing capacity are analyzed in detail.The limitation of diameter-thickness ratio for Q460 steel tubes is put forward,which could provide guidance for the current design of transmission line steel towers.

关 键 词：径厚比限值 Q460高强钢管 长细比 强度折减系数 失稳破坏 

分 类 号：TM753[电气工程—电力系统及自动化]