特高压直流输电塔风荷载阻力系数的精细化试验研究

钟维军; 徐海巍; 姚剑锋; 楼文娟; 郭高鹏

doi:10.13204/j.gyjzG20101801

特高压直流输电塔风荷载阻力系数的精细化试验研究

doi: 10.13204/j.gyjzG20101801

1. 宁波市电力设计院有限公司, 浙江宁波 315000;
2. 浙江大学建筑工程学院, 杭州 310058;
3. 浙江水利水电学院建筑工程学院, 杭州 310018

基金项目:

国家自然科学基金项目(51978614,51838012)。

详细信息

作者简介:
钟维军,男,1981年出生,硕士研究生,高级工程师。

通讯作者:
徐海巍,男,1986年出生,博士,副教授,haiweix@zju.edu.cn。

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出版历程
- 收稿日期: 2020-10-18
- 网络出版日期: 2022-12-01

Wind Tunnel Study on Precise Drag Coefficients of UHVDC Transmission Towers

1. NingBo Electric Power Design Institute, Ningbo 315000, China;
2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;
3. College of Civil Engineering and Architecture, Zhejiang University of Water Resource and Electricity Power, Hangzhou 310018, China

摘要

摘要: 为了研究角钢输电塔的局部杆件和整体的风载阻力系数,采用高频天平测力试验获得了考虑干扰下横担和塔身主要角钢杆件随风向角变化的阻力系数,测试了不同风向角下塔身和横担的单片平面阻力系数和整体阻力系数,并分析了背风面降低系数的取值。在此基础上将试验结果与各国规范进行了比较。研究表明:局部杆件阻力系数受其位置变化而差异较大,大部分横担和塔身杆件的最大阻力系数值要大于GB 50009—2012《建筑结构荷载规范》建议值(1.3);横担的上下表面对其整体风荷载贡献明显,而我国DL/T 5154—2012《架空输电线路杆塔结构设计技术规定》可能仅考虑了迎风和背风面风荷载而导致给出的横担整体阻力系数偏小;塔身的迎风面和整体阻力系数接近国外规范但略大于我国规范;试验得到的横担和塔身背风面降低系数分别为0.73和0.62;相比不同规范,我国规范的背风面降低系数取值偏保守。
- 特高压输电塔 /
- 风洞试验 /
- 阻力系数 /
- 角钢 /
- 背风面降低系数
Abstract: In order to study the wind drag coefficients on main rods and whole structure of an angle-steel transmission tower, high frequency force balance test was carried out to obtain drag force coefficients of main rods of the cross arm and tower body under various wind azimuths. Interference of surrounding rods on drag force was considered during the test. Meanwhile, drag force coefficients of a single plane and whole parts of the tower body and cross-arm were tested under different wind azimuths, respectively, and the corresponding shielding factors were also analyzed. In addition, the obtained experimental results were compared with the current national code provisions. The study showed that drag force coefficients of a main rod were significantly influenced by its location. Most rods of the cross arm and tower body had maximum drag force coefficients larger than 1.3 as recommended by Load Code for the Design of Building structures (GB 50009-2012). Wind loads acting on the upper and lower surfaces of the cross arm contributed a lot to overall wind loads on the cross arm, however. Technical Code for the Design of Tower and Pole Structures of Overhead Transmission Line (DL/T 5154-2012) only considered those on the windward and leeward surfaces of the cross arm, resulting in underestimation of overall wind drag force. The drag force coefficients of a single plane and whole parts of the tower-body were close to those given by the foreign codes, but slightly larger than those in Chinese codes. The tested shielding factors of leeward sides of the cross arm and tower body were 0.73 and 0.62, respectively. Comparing the test results with different code recommended values indicated that the shielding factors in Chinese codes were more conservative.
- UHVDC /
- wind tunnel test /
- drag coefficient /
- angle steel /
- leeward shielding factor

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参考文献(16)

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