强风作用下输电塔线体系连续性倒塌分析

李悦; 谢强; 张欣; 张戬

doi:10.3969/j.issn.0258-2724.20220619

强风作用下输电塔线体系连续性倒塌分析

doi: 10.3969/j.issn.0258-2724.20220619

李悦^1,,
谢强^{1, 2, ,},
张欣¹,
张戬³

1.
同济大学土木工程学院，上海 200092
2.
同济大学工程结构性能演化与控制教育部重点实验室，上海 200092
3.
厦门市住房保障和房屋管理局，福建厦门 361001

基金项目: 国家自然科学基金（52278523）

详细信息

作者简介:
李悦（1993—），女，博士研究生，研究方向为输电线路抗风，E-mail：1610226@tongji.edu.cn

通讯作者:
谢强（1971—），男，教授，研究方向为电力设备防灾减灾，E-mail：qxie@tongji.edu.cn

中图分类号: TM75
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- 文章访问数: 299
- HTML全文浏览量: 210
- PDF下载量: 59
- 被引次数: 0
出版历程
- 收稿日期: 2022-09-15
- 修回日期: 2022-11-10
- 网络出版日期: 2023-09-19
- 刊出日期: 2022-11-10

Cascading Failure Analysis of Transmission Tower–Line System Under Strong Wind

LI Yue^1
,,
XIE Qiang^{1, 2
, ,},
ZHANG Xin¹,
ZHANG Jian³

1.
College of Civil Engineering, Tongji University, Shanghai 200092, China
2.
Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education, Tongji University, Shanghai 200092, China
3.
Xiamen Housing Support and Housing Administration Bureau, Xiamen 361001, China

摘要

摘要:
为分析强风作用下输电塔线体系连续性倒塌的过程，将已发生破坏的输电塔作为薄弱塔，采用等效位移的方式考虑薄弱塔倒塌对挂线点空间位置的影响，计算相邻输电塔（目标塔）在薄弱塔多组倒塌特征变量组合工况下的响应和破坏特征，确定对目标塔具有最大影响的薄弱塔倒塌特征变量. 结果表明：在发生连续性倒塌时，目标塔的破坏包括近薄弱塔侧的塔身破坏和塔头破坏2种形式；目标塔近薄弱塔侧背风面主材应力比最高，斜材应力比一直较低；塔身下部斜材失稳与主材应力的持续增大是目标塔整体倒塌的最直接原因；薄弱塔的倒塌过程持续时间是目标塔是否破坏的主要控制变量.
- 输电线路 /
- 分布式风场 /
- 连续性倒塌 /
- 数值模拟 /
- 参数分析
Abstract:
In order to analyze the cascading failure of the transmission tower–line system under strong wind, this paper took the collapsed transmission tower as the weak tower and used equivalent displacement to consider the influence of weak tower collapse on the spatial location of suspension points. The responses and failure characteristics of the adjacent transmission tower (target tower) under multiple combined groups of the weak tower collapse parameters were calculated, and the weak tower collapse parameters with the greatest influence on the target tower were determined. The results show that when cascading failure happens, the failure of the target tower includes two types, the failure of the tower body near the weak tower and the failure of the tower head. The main bracing on the leeward side of the weak tower has the highest stress ratio. The stress ratios of diagonal bracings are always low. The most direct causes of the overall collapse of the target tower are the instability of diagonal bracings at the lower part of the target tower and the continuous increase in stress of the main bracing. The duration of the weak tower collapse is the main control variable for the failure of the target tower.
- transmission lines /
- distributed wind /
- cascading failure /
- numerical simulation /
- parameter analysis

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图 1 输电塔基本信息

Figure 1. Basic information of transmission tower

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图 2 目标塔及薄弱塔相对位置

Figure 2. Relative position of target tower and weak tower

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图 3 挂线点等效位移

Figure 3. Equivalent displacement of suspension point

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图 4 输电塔线体系模型风荷载

Figure 4. Wind load of transmission tower–line system model

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图 5 目标塔破坏类型

Figure 5. Failure types of target tower

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图 6 目标塔单元位置

Figure 6. Element locations of target tower

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图 7 目标塔主材B应力与绝缘子轴力

Figure 7. Stress of main bracing B of target tower and axial force of insulator

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图 8 目标塔斜材应力与绝缘子轴力

Figure 8. Stress of diagonal bracings of target tower and axial force of insulator

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图 9 目标塔塔身破坏过程关键变量的时程图

Figure 9. Time-history of key variables in failure process of target tower body

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图 10 目标塔塔头破坏过程

Figure 10. Failure process of target tower head

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图 11 目标塔主材应力比

Figure 11. Stress ratio of main bracings of target tower

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图 12 薄弱塔破坏触地工况下的目标塔破坏状态

Figure 12. Failure state of target tower under weak tower collapse and ground contact condition

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图 13 薄弱塔非破坏触地工况下的目标塔破坏状态

Figure 13. Failure state of target tower under weak tower collapse and non-ground contact condition

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图 14 薄弱塔倒塌破坏控制参数的主要影响区

Figure 14. Main influence zones of weak tower collapse control parameters

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表 1 输电塔材料

Table 1. Material of transmission tower

输电塔	屈服强度/MPa	屈服应变/%	本构模型
Q235	235	0.15	理想弹塑性
Q345	345	0.15	理想弹塑性

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表 2 输电线材料

Table 2. Material of transmission line

输电线	综合截面/mm²	弹性模量/MPa	线密度/（kg•km⁻¹）
地线	118.9	123	631.00
导线	338.9	69	1085.50

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表 3 薄弱塔倒塌触地工况

Table 3. Weak tower collapse and ground contact condition

破坏点	h/m	θ/(°)	T/s	y/m	z/m
D₁	22.0	156.4	0.5,1.0, 2.0,3.0	9.59	−42.00
D₂	20.0	140.3		16.61	−42.00
D₃	18.0	130.0		21.45	−42.00
D₄	16.0	122.2		25.38	−42.00
D₅	14.0	115.9		28.77	−42.00
D₆	12.0	110.7		31.81	−42.00
D₇	10.0	106.1		34.58	−42.00

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