摘要
SZT2钢管塔是我国第1基1000kV交流特高压双回路真型试验塔,塔总高93.4m,质量132t,依照标准DL/T899—2004《架空线路杆塔结构荷载试验》,在大风、验算冰、锚线、断线等9个试验工况下对其进行试验。试验结果表明:SZT2塔的位移测试结果满足变形要求;应变测试结果没有超过构件承载力,说明整体结构是安全的;试验还验证了锻造带颈法兰在特高压双回路钢管塔中能够安全可靠地传力,由于其能起到降低焊接工作量和提高加工效率的目的,建议在实际工程中推广使用;SZT2塔采用的节点板连接方案可行,U型插板、十字插板及C型插板安全可靠;连接板端部钢管的局部屈服是设计的薄弱点,应加强防止局部破坏的构造。
The SZT2 tubular steel tower with height 93.4 m and weight 132 t, is the first full-scale test tower for 1 000 kV UHV AC double-circuit transmission line in China, and was subjected to tests under operation conditions including wind, ice, anchor-wire, broken wire etc., which was conducted according to the standard DL/T 899-2004 ＂Loading Tests on Tower and Pole Structures of Overhead Line＂. The test results show that the real displacement and stress of tower SZT2 met the requirement of deformations and member＇s carrying capacity respectively, and the whole structure is safe. The success of full-scale test verified the feasibility of forging high-neck flange applied in UHV AC double-circuit tubular steel tower. In view of reducing the welding workload and enhancing the efficiency, it is advised to boost the application of the forging neck flange in UHV AC double-circuit line project. It is feasible to adopt the joint board in the nod of tower SZT2, and the plug-in boards used in tower SZT2 such as U type, -1- type, C type are all reliable. The tubular steel＇s local yielding at the end of joint board is a main flaw of design, so special attention should be paid to this kind of conformation design.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2009年第34期102-107,共6页
Proceedings of the CSEE
关键词
输电线路
特高压
双吲路
钢管铁塔
真型试验
局部屈服
transmission lines
UHV
double circuits
tubular steel tower
full-scale test
local yielding
