输电塔及塔线耦联体系地震响应分析与对比  

Seismic Response Analysis and Comparison of Transmission Tower and Tower⁃line Coupling System

作　　者：陈艺征 唐艳 石碧耀 吴泽威 梁云 鞠登峰 CHEN Yizheng;TANG Yan;SHI Biyao;WU Zewei;LIANG Yun;JU Dengfeng(China Electric Power Research Institute,Beijing 100089,China)

机构地区：[1]中国电力科学研究院有限公司,北京100089

出　　处：《高压电器》2025年第4期101-110,共10页High Voltage Apparatus

摘　　要：近年来,强震对于电力系统的正常运行造成严重威胁,因此对电力系统关键结构进行抗震分析和评估尤为重要。文中针对某220 kV高压输电线路中实际输电塔及其塔线耦联体系进行抗震性能评估。首先,采用Abaqus软件建立塔体及塔线耦联体系有限元模型,分析其动力性能、塔腿杆件应力、节点位移及加速度响应。通过对比单塔和塔线体系的动力性能和响应峰值,获得导线耦联对输电塔的动力影响。结果表明:耦联体系中输电塔的基频要低于单塔模型6%~9%左右,导、地线的存在会使得结构基频降低;由于导地线作用,单塔地震响应峰值与地面运动峰值加速度的线性关系变为非线性关系;低烈度下塔线耦联体系中输电塔的地震响应要高于单塔模型,随烈度提高,耦联体系中输电塔地震响应相对于单塔模型呈逐渐降低的趋势;塔线耦联体系中输电塔的节点位移峰值和节点绝对加速度峰值都要低于单塔模型;在垂线路方向上导、地线的非线性振动减震效应要明显强于其质量放大效应。In recent years,the strong seismic has caused serious threat to the normal operation of power system.Therefore,it is particularly essential to perform seismic analysis and assessment of key structures of the power sys-tem.In this paper,the seismic performance assessment of a transmission tower and the associated tower-line cou-pling system in a 220 kV high-voltage transmission line is performed.Firstly,The finite element model of the tower structure and tower-line coupling system is set up by using Abaqus software to analyze its dynamic performance,stress of the tower leg members,node displacement,and acceleration response.The influence of the conductor cou-pling on the dynamic of the transmission tower is obtained through comparing the dynamic performance and response peak of a single tower and tower-line system.The result shows that the fundamental frequency of the transmission tow-er in the coupled system is about 6%~9%lower than that of the single tower model and the structural fundamental fre-quency is reduced due to the existence of the conductor and ground wire.Due to the effect of the conductor and ground wire,the linear relationship between the peak seismic response of the tower and the peak motion acceleration becomes into a nonlinear relationship.Under the low intensity,the seismic response of the transmission tower in the tower-line coupled system is higher than that of the single tower model and,with the increase of intensity,the seismic response of the tower in the coupled system,compared to the single tower model,tends to gradually decrease.Both the node displacement peak and node absolute acceleration peak of the transmission tower in the tower-line coupled system are lower than those of the single tower model.In the vertical line direction,the nonlinear vibration damping effect of the conductor and ground wire is significantly stronger than its mass amplification effect.

关 键 词：输电塔 地震响应 耦联体系 导线 非线性振动 

分 类 号：TU311.3[建筑科学—结构工程]