考虑多重性能水准的特高压双柱悬索拉线塔风灾易损性分析  

Wind Fragility Analysis of UHV Double Column Suspended Guyed Tower Considering Multiple Performance Levels

作　　者：李正良[1] 张智航 王涛 LI Zhengliang;ZHANG Zhihang;WANG Tao(School of Civil Engineering,Chongqing University,Shapingba District,Chongqing 400045,China;School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150040,Heilongjiang Province,China)

机构地区：[1]重庆大学土木工程学院,重庆市沙坪坝区400045 [2]哈尔滨工业大学交通科学与工程学院,黑龙江省哈尔滨市150040

出　　处：《中国电机工程学报》2024年第20期8304-8315,I0032,共13页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：重庆市博士后研究项目特别资助(2022CQBSHBT3009);哈尔滨工业大学重庆研究院博士后特别支持计划(KY506023002)。

摘　　要：特高压双柱悬索拉线塔为典型的风敏感结构,其在不同强度风荷载作用下易遭受不同程度的损伤及破坏,针对此类结构的风致损伤评估研究亟待开展。该文提出一种考虑多重性能水准的特高压双柱悬索拉线塔风灾易损性分析方法。首先,开展结构立柱刚性模型的风洞试验,获取立柱的气动三分力系数并模拟得到相应风荷载;进而,定性划分双柱悬索拉线塔的性能水准,并基于Pushover分析给出各性能水准所对应的量化模型;最后,在求得双柱悬索拉线塔概率风灾需求模型的基础上,对其进行风灾易损性分析,并研究风向角对易损性曲线的影响。结果表明:结构主体立柱的气动升力系数CL和气动力矩系数CM在不同工况下均接近于0,气动阻力系数CD则均大于2,且从0°到45°呈递增趋势;基于立柱顶点位移可建立双柱悬索拉线塔的多重性能水准,而由风灾易损性分析可知,双柱悬索拉线塔在正常使用条件下发生各级风致损伤及破坏的概率很小,结构具有良好的抗风性能;风向角对双柱悬索拉线塔风灾易损性影响显著,结构的最不利和最有利风向角分别为90°和0°。The UHV double column suspended guyed tower is a typical wind-sensitive structure,which is susceptible to different degrees of damage and destruction under different wind loads.The relevant research on wind-induced damage assessment of such structures is urgently needed.Therefore,a wind disaster fragility analysis method considering multiple performance levels of UHV double column suspended guyed tower is proposed in this paper.First,the wind tunnel test of the rigid model of the structural column is carried out,and the aerodynamic three-component force coefficient of the column is obtained.Furthermore,the corresponding wind load is simulated.Then,the performance level of the double column suspended guyed tower is qualitatively divided,and the corresponding quantitative model of each performance level is given based on Pushover analysis.Finally,based on the probabilistic wind disaster demand model of double column suspended guyed tower,the wind disaster fragility analysis is carried out,and the influence of wind direction angle on the fragility curve is studied.The results show that:the aerodynamic lift coefficient CL and aerodynamic moment coefficient CM of the main column of the structure are close to 0 at different wind angles,while the aerodynamic drag coefficient CD is greater than 2,and it shows an increasing trend from 0°to 45°.Based on the vertex displacement of the column,multiple performance levels of double column suspended guyed tower can be established.According to the analysis of wind disaster fragility curve,the probability of wind damage and destruction of the double column suspended guyed tower under normal use conditions is small,and the structure has good wind resistance.Wind direction has a significant effect on the structural wind disaster fragility curve.The most unfavorable and favorable wind angles of double column suspended guyed tower are 90°and 0°,respectively.

关 键 词：特高压双柱悬索拉线塔 多重性能水准 风洞试验 风灾易损性 风向角 

分 类 号：TM753[电气工程—电力系统及自动化]