|本期目录/Table of Contents|

[1]肖 凯,付 兴,雷 旭,等.输电线路风致倒塌失效分析及监测方案[J].建筑科学与工程学报,2019,36(04):71-79.
 XIAO Kai,FU Xing,LEI Xu,et al.Failure Analysis of Transmission Line Subjected to Wind Loading and Monitoring Scheme[J].Journal of Architecture and Civil Engineering,2019,36(04):71-79.
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输电线路风致倒塌失效分析及监测方案(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
36卷
期数:
2019年04期
页码:
71-79
栏目:
出版日期:
2019-07-25

文章信息/Info

Title:
Failure Analysis of Transmission Line Subjected to Wind Loading and Monitoring Scheme
文章编号:
1673-2049(2019)04-0071-09
作者:
肖 凯1,付 兴2,雷 旭1,汪 佳2,谢文平1,李宏男2,聂 铭1
(1. 广东电网有限责任公司电力科学研究院,广东 广州 510080; 2. 大连理工大学 建设工程学部,辽宁 大连 116024)
Author(s):
XIAO Kai1, FU Xing2, LEI Xu1, WANG Jia2, XIE Wen-ping1, LI Hong-nan2, NIE Ming1
(1. Electric Power Research Institute of Guangdong Power Grid Co. Ltd., Guangzhou 510080, Guangdong, China; 2. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China)
关键词:
输电塔线体系 失效机制 非线性静力分析 健康监测
Keywords:
transmission tower-line system failure mechanism nonlinear static analysis health monitoring
分类号:
TU347
DOI:
-
文献标志码:
A
摘要:
为研究输电线路的抗风性能及现场监测方案,利用ANSYS软件对整个耐张段的抗风承载力进行了模拟。以广东省2条正在运营的输电线路为工程背景,建立了2条耐张段输电线路有限元模型。对模型施加风荷载并不断调整风速,完成了非线性静力倒塌分析,进而研究了规范中提到的潜在最不利风攻角的影响; 根据应力云图和振型等信息对应变及加速度传感器的布置方案进行了设计; 通过对实测的加速度数据进行分析,得到了32#塔2个水平方向的前2阶频率。结果表明:121#~129#耐张段中124#塔首先发生破坏,最不利风攻角为90°,临界倒塌风速为34.91 m·s-1,与设计风速35 m·s-1非常接近; 30#~34#耐张段最先失效的铁塔为32#塔,最不利风攻角为60°,临界倒塌风速为45.6 m·s-1,大于其设计风速35 m·s-1,这是因为设计时采用的是双分裂导线,而实际工程采用单根导线; 实测结果与有限元仿真结果两者的相对误差小于10%,说明了监测数据的可靠性; 铁塔首先进入屈服的位置一般为变坡处上下连接主材、塔身横隔上方连接主材和塔腿主材,并且主材应力较大区域往往与主材截面规格变化处相吻合,因此这些位置在设计和监测时需要加以重视。
Abstract:
In order to study the wind resistance performance of transmission lines and on-site monitoring scheme, the wind resistance capacity of the whole tension section was simulated by ANSYS software. Based on the engineering background of two practical transmission lines in Guangdong Province, the finite element models of two tension-resistant sections were established. By applying wind loads on the model and continuously adjusting the wind speed, the non-linear static collapse analysis was completed, and the influence of the potential worst wind attack angle mentioned in the code was studied. Based on the information of stress nephogram and mode shape, the layout scheme of strain and acceleration sensor was designed. Through analyzing the measured acceleration data, the first two order frequencies of 32# tower in two horizontal directions were obtained. The results show that 124# tower in tension section 121# -129# was damaged firstly. The most isadvantageous attack angle was 90°. The critical collapse wind speed was 34.91 m·s-1, which was very close to the design wind speed of 35 m·s-1. 32# tower is the first failure tower in tension section 30#-34#, and the most disadvantageous wind attack angle is 60°, as well as the critical collapse wind speed is 45.6 m·s-1, which is larger than the designed wind speed of 35 m·s-1. This is because the double split conductor is used in the design, while the single conductor is used in the actual project. The relative error between the measured results and the finite element simulation results is less than 10%, which shows the reliability of the monitoring data. The connection main material up and down the changing slope, connection main material above tower body diaphragm and main material of tower legs are the firstly yielded members of tower. The areas where the stress of the main material is larger often coincide with the changes of the cross-section specifications of the main material. Therefore, attention should be paid to these locations in the design and monitoring of the main material.

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备注/Memo

备注/Memo:
收稿日期:2018-10-22
基金项目:国家自然科学基金项目(51708089,51421064); 中国博士后科学基金项目(2019T120207,2017M620101); 中央高校基本科研业务费专项资金项目(DUT19RC(4)021); 中国南方电网有限责任公司科技项目(GDKJQQ20153009)
作者简介:肖 凯(1986-),男,湖南益阳人,工程师,E-mail:xk0606@sina.cn。
通信作者:付 兴(1988-),男,辽宁葫芦岛人,讲师,工学博
更新日期/Last Update: 2019-07-26