特高压钢管输电塔构件长细比取值研究  

Research on Determining slenderness ratio of members of superhigh voltage transmission steel tubular towers

作　　者：杨靖波[1] 韩军科[1] 李茂华[1] 杨风利[1] 

机构地区：[1]中国电力科学研究院,北京100055

出　　处：《武汉大学学报（工学版）》2009年第S1期245-248,共4页Engineering Journal of Wuhan University

摘　　要：钢管塔在我国特高压输电线路中得到广泛应用.为保证结构安全、经济,需要合理选择钢管构件的长细比.以1 000 kV淮南-上海(皖电东送)同塔双回线路钢管塔为研究对象,通过典型塔型的有限元设计校核,分析了塔身主材杆端弯矩对其承载力的影响,提出了主材长细比不大于35的取值及校核建议.对于特高压钢管塔的水平材和一些斜材及辅助材,基于不同长细比钢管构件的微风振动特性和对现行设计规程的分析,从同时控制振动和降低塔重的角度提出了构件长细比不大于160的取值要求.Transmission steel tubular towers have been widely applied to superhigh voltage transmission lines in China.The slenderness ratio of tube should be selected appropriately to ensure the superhigh voltage tower's safety and economy.Taking the 1 000 kV transmission line project of South Anhui to Shanghai(Anhui-to-east power transfer) as background,the effects of rod end moment on tower leg are analyzed by the finite element method for some typical towers.Based on the finite element method results and Chinese standards,it is suggested that the slenderness ratio of tower leg should be below 35.And then,for the horizontal or oblique members,with analysis of their dynamic characteristics and the present design standards,it is suggested that the slenderness ratio should be below 160 in view of breeze vibration control and weight reduction at the same time for the members.

关 键 词：特高压 钢管塔 长细比 杆端弯矩 微风振动 

分 类 号：TU398.9[建筑科学—结构工程]