螺栓滑移对电力塔线结构变形的影响  

Effect of Bolt Slipping on Deformations in Transmission Line System of Electric Power

作　　者：李英梅[1] 赫荣程 刘均[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110004 [2]辽宁省建设标准设计院,辽宁沈阳110003

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第5期865-868,共4页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省自然科学基金项目(20092001)

摘　　要：目的探讨螺栓预紧力和安装孔隙的存在,在设计或使用不当时造成的螺栓滑移对输电塔线结构变形的影响.方法选取变电所出口工程中大跨距的输电塔线结构,采用考虑螺栓滑移的本构模型,将基于ANSYS的输电塔支撑钢结构变形的有限元模拟和带有绝缘子架空线垂度进行了耦合分析与求解.结果螺栓滑移和温度变化后,支撑钢结构架空线悬挂点的位移,与未考虑螺栓滑移的结构变形相比,在夏冬两季分别增大32%～87%和59%～110%;与设计值相比架空线垂度也分别增加了156～307mm和206～392mm,最大增幅可达23.5%,与实测结果相符.结论电力塔线结构变形的耦合求解方法能够很好地分析螺栓滑移和温度对输电塔线结构变形的影响,过载引起的螺栓滑移是使输电支撑钢结构变形增大,导致架空线垂度明显增加的主要因素.The effect of bolt slipping on deformations of electric power transmission line system is studied owing to bolt pretension and installation gap when in inappropriate design or use.A stress-strain relationship with bolt-slipping is adopted,and the FEM of deformations of supporting steel-structure based on ANSYS and the sags of trolly wire with insulators are coupled and solved in a large-span transformer substation export project transmission tower line system.The results are shown that owing to slipping bolt and changing temperature,the horizontal displacements of trolly wires′s hanging points in support structure increase 32%～87% and 59%～110% in summer and in winter respectively.Meanwhile the sags of trolly wires also enlarge 156～307 mm and 206～392 mm,and the maximum increment rate can reach 23.5%.It would be concluded that this method can well calculate the effect of bolt-slipping and temperature on deformations of electric power transmission line system.Bolt slipping caused by overloading is the main factor of the increments of deformations in support structure and increasing sags of trolly wire.

关 键 词：螺栓滑移 架空线 有限元 垂度 绝缘子 

分 类 号：TU279.744[建筑科学—建筑设计及理论] TU311.4