丁祥,夏浩衍,龚坚刚,周奇,曹枚根
DING Xiang,XIA Haoyan,GONG Jiangang,ZHOU Qi,CAO Meigen

• 1:浙江华云电力工程设计咨询有限公司
• 2:汕头大学土木与环境工程系
• 3:北方工业大学

摘要(Abstract)：

输电塔是高柔度的风敏感结构，若输电塔地基不均匀沉降后再遭遇台风侵袭将对输电塔安全性造成严重危害。为评估地基沉降对输电塔抗风能力的影响，建立了输电塔线体系耦合有限元模型，对比分析了台风作用下不同地基倾斜角度下输电塔线体系风振响应、风振系数和主材应力变化规律。研究表明：相同的倾斜角度下，横线向倾斜较顺线向倾斜风振响应均方根值增加明显，最大增幅为40%；地基沉降所导致的结构倾斜，会导致风振系数超过规范值，最不利情况会导致风振系数超过规范值9.6%；压应力变化规律与风振系数变化规律一致，倾斜5°工况下压应力增加最大，较未倾斜时塔腿压应力增加了16.1%。研究成果对台风多发地区输电塔抗风评估及安全运行具有重要的参考价值。
Transmission towers are highly flexible and wind-sensitive structures. Uneven settlement of foundations followed by typhoons jeopardizes the operation safety of transmission towers. In order to assess the influence of foundation settlement on the wind resistance capacity of transmission towers, a coupled finite element model of the transmission tower-line system is established to compare and analyze the change law of wind-induced vibration responses, wind vibration coefficients and main material stresses of the transmission tower-line system under different tilt angles of foundation in case of a typhoon. The study shows that under the same tilt angle, the root mean square(RMS) of wind-induced vibration response increases significantly in the horizontal tilt in relation to vertical tilt by at most 40%; the structural tilt caused by the foundation settlement will lead to the wind vibration coefficient exceeding the specified value, and the most unfavorable situation will lead to the wind vibration coefficient exceeding the specified value by 9.6%; the change law of compressive stress is consistent with that of wind vibration coefficient, and the compressive stress increases most under a tilt angle of 5°, and the compressive stress increases by 16.1% in contrast to when the tower leg is not tilted. The research results have significant reference value for the wind resistance assessment and safe operation of transmission towers in typhoon-prone areas.

关键词(KeyWords)： 输电塔线体系;基础沉降;风振位移响应;风振系数;主材压应力
transmission tower-line system;foundation settlement;wind-induced vibration displacement response;wind-induced vibration coefficient;compressive pressure of main material

Abstract:

Keywords:

基金项目(Foundation): 浙江省电力有限公司科技项目（2020C1D02P09）

作者(Author): 丁祥,夏浩衍,龚坚刚,周奇,曹枚根
DING Xiang,XIA Haoyan,GONG Jiangang,ZHOU Qi,CAO Meigen

DOI: 10.19585/j.zjdl.202303012

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