±800kV与500kV混压大跨越钢管混凝土塔等效风荷载分析  

Analysis of Equivalent Wind Load on Large-Span Transmission Steel Pipe Concrete Tower of±800 kV DC Mixed with 500 kV AC Lines

作　　者：张树林 孟宪乔 郑治祥 徐智东 李正良[2] 汪之松[2] ZHANG Shulin;MENG Xianqiao;ZHENG Zhixiang;XU Zhidong;LI Zhengliang;WANG Zhisong(China Energy Engineering Group Anhui Electric Power Design Institute Co.,Ltd.,Hefei 230601,China;Chongqing University,Chongqing 400044,China)

机构地区：[1]中国能源建设集团安徽省电力设计院有限公司,安徽合肥230601 [2]重庆大学,重庆400044

出　　处：《电力勘测设计》2024年第6期24-30,共7页Electric Power Survey & Design

摘　　要：大跨越钢管混凝土塔相比于普通钢管塔存在质量、刚度突变的特点。为探究钢管混凝土塔和钢管塔在风荷载作用下的响应规律及设计风荷载的取值,该文以实际工程为例,通过有限元模拟分析了两种塔型的动力特性和风振响应,并将等效静力风荷载与规范结果进行比较。结果表明:钢管混凝土塔的刚度明显高于钢管塔,且前几阶频率相对密集,振型间相互耦合明显;按规范等效风荷载的结构响应大于时程分析响应极值;按规范计算的钢管混凝土塔风振系数在灌入混凝土顶部附近存在突变;钢管混凝土塔顶部位移、加速度响应明显小于钢管塔,且钢管混凝土塔的脉动响应下降更为明显。Compared with the ordinary steel tubular towers,the large-span concrete-filled steel tubular towers has the characteristics of sudden change of mass and stiffness.In order to investigate the response of concrete-filled steel tubular towers and steel tubular towers under the action of wind load and the value of design wind load,this paper analyses the dynamic characteristics,wind-induced vibration response,and compares the equivalent static wind load with the results of the specification,taking the actual project as an example.The results show that the stiffness of the concrete-filled steel tubular tower is obviously higher than that of the steel tubular tower,and the frequency of the first few orders is relatively dense,and the mutual coupling between the vibration modes is obvious;the structural response under the code-equivalent wind load is larger than the extreme value of the response of the time-history analysis;the wind-induced vibration coefficient obtained by the specification for the concrete-filled steel tubular tower has a sudden change near the top of the poured concrete;the top displacement and acceleration response of the concrete-filled steel tubular tower is obviously smaller than that of the steel tubular tower,and the pulsation response of the concrete-filled steel tubular tower decreases more obviously.

关 键 词：钢管混凝土塔 钢管塔 等效静力风荷载 风振系数 风振响应 

分 类 号：TM753[电气工程—电力系统及自动化]