输电杆塔在风沙荷载激励下的动力响应分析  

Dynamic response analysis of transmission tower under wind-sand load induce

作　　者：张卓群 李宏男 李士锋 默增禄 郝鑫 Zhang Zhuoqun1,2 Li Hongnan1, Li Shifeng2 ,Mo Zenglu2, Hao Xin2(1. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China; 2. State Nuclear Electric Power Planning Design and Research Institute Co. , Ltd. , Beijing 100095, Chin)

机构地区：[1]大连理工大学建设工程学部,大连116024 [2]国核电力规划设计研究院有限公司,北京100095

出　　处：《东南大学学报（自然科学版）》2018年第3期506-511,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金重大研究计划资助项目(91315301);国家自然科学基金委创新研究群体基金资助项目(51121005)

摘　　要：为了深入研究风沙荷载对输电铁塔的危害、提高我国输电线路整体的防灾减灾能力,以直线塔为研究对象,采用SAP2000软件模拟了杆塔结构在风荷载和风沙荷载作用下的动力响应.将风沙荷载简化为风荷载与沙粒荷载的叠加,并应用Matlab软件进行模拟.风荷载采用Kaimal风速谱和谐波叠加法进行拟合,沙粒荷载则基于动量守恒定律和沙尘暴天气等级进行简化.风荷载与风沙荷载作用下单塔结构动力响应特性的对比结果表明:风沙荷载、结构动力响应、塔顶最大顺风向位移均随着风沙荷载等级的增加而增大,且均大于风荷载单独作用.此外,最高等级的风沙荷载较同风速下风荷载作用的塔顶最大顺风向位移增加约26.94%.因此,在风沙灾害频发的区域,风沙荷载对输电线路的危害应予以关注.To study the damage of wind-sand load on the transmission tow er and improve the disaster prevention and mitigation capacity of China＇s whole transmission line,the dynamic responses of tow er structures under the wind load and the wind-sand load were simulated by SAP2000 softw are with the straight tow er as the research topic. The wind-sand load was simplified to the superposition of the wind load and the sand load and simulated by Matlab softw are. The wind load was simulated by the Kaimal fluctuating wind pow er spectrum and the harmonic superposition method,and the sand load was simplified based on the conservation law of momentum and the sandstorm weather rating.The comparative results of the dynamic response characteristics of the single tow er structure under the wind load and the wind-sand load demonstrate that the wind-sand load,the structural dynamic response and the maximum of longitudinal displacements on the tow er top increase with the increase of the sandstorm grade and are greater than those under the wind load. In addition,the maximum longitudinal displacement on the tow er top under the highest grade wind-sand load increases by26. 94% than that under the wind load at the same wind speed. Therefore,in the area of frequent wind-blow n sand disasters,the wind-sand load disaster on the transmission tow ers should be paid attention.

关 键 词：输电塔 沙粒荷载模拟 风沙荷载激励 动力响应分析 

分 类 号：TU352[建筑科学—结构工程]