下击暴流作用下输电塔-线体系倒塌破坏研究

毕文哲; 田利

doi:10.6052/j.issn.1000-4750.2021.05.S012

下击暴流作用下输电塔-线体系倒塌破坏研究

doi: 10.6052/j.issn.1000-4750.2021.05.S012

毕文哲,
田利^,

山东大学土木工程系，山东，济南 250061

基金项目: 山东大学青年学者未来计划项目(2017WLJH33)

详细信息

作者简介:
毕文哲(1997−)，女，山东人，博士生，主要从事输电塔-线体系抗风研究 (E-mail: 845860312@qq.com)

通讯作者:
田　利(1982−)，男，山东人，教授，博士，博导，主要从事结构防灾减灾工程研究 (E-mail: tianli@sdu.edu.cn)

中图分类号: TM75；TU312+.3
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- 文章访问数: 124
- HTML全文浏览量: 22
- PDF下载量: 27
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-29
- 修回日期: 2022-02-17
- 网络出版日期: 2022-03-01
- 刊出日期: 2022-06-06

STUDY ON THE COLLAPSE FAILURE OF TRANSMISSION TOWER-LINE SYSTEM UNDER DOWNBURST

BI Wen-zhe,
TIAN Li^,

School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China

摘要

摘要: 下击暴流在近地面形成的短时破坏性强风会对建筑结构造成较大威胁，尤其是输电塔-线体系等风敏感结构。依托实际工程，该文建立了输电塔-线体系有限元模型，采用确定性-随机性混合模型生成下击暴流风场，基于Tian-Ma-Qu本构模型模拟了该结构在下击暴流作用下的连续倒塌过程。结果表明，下击暴流下输电塔表现为在极短时间内的局部大变形，该区域大量斜材和少量主材相继屈曲是导致输电塔发生整体倒塌的主要原因。该输电塔的薄弱部位是第六节间，在抗下击暴流设计中应重点关注。
- 下击暴流 /
- 倒塌破坏 /
- 有限元模拟 /
- 时程分析 /
- 输电塔-线体系
Abstract: The short-term destructive strong wind formed by the downburst near the ground will pose a greater threat to building structures, especially to wind-sensitive structures such as transmission tower-line systems. Based on practical engineering, a new finite element model for the transmission tower-line system is established. The deterministic-stochastic hybrid model is used to simulate the generation of the downburst wind field. Based on the Tian-Ma-Qu material model, the progressive collapse process of the structure under the downburst is conducted. The research results demonstrate that: the transmission tower under the downburst performs its significant local deformation in a short time, the buckling of many diagonal members and several main members is the governing reason for the entire collapse of the tower. The segment 6 of the tower is considered the weakest position, to which should be particularly paid attention in the design of the structural resistance to downburst.
- downburst /
- collapse failure /
- finite element simulation /
- response history analysis /
- transmission tower-line system

HTML全文

图 1 直线塔的平面尺寸与杆件构成　/mm

Figure 1. Dimension and configuration of the suspension tower

下载: 全尺寸图片幻灯片

图 2 “一塔两线”三维有限元模型　/m

Figure 2. Finite element model of transmission tower-line system

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图 3 下击暴流平均风速合成示意图

Figure 3. Vector diagram of average wind speed of downburst

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图 4 输电塔-线体系与下击暴流相对位置图　/m

Figure 4. Relative position between the transmission tower-line system and downburst

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图 5 塔身66.5 m处模拟点下击暴流风速时程

Figure 5. Time history of wind speed at height of 66.5 m

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图 6 Tian-Ma-Qu本构模型

Figure 6. Tian-Ma-Qu material model

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图 7 塔顶水平位移时程曲线和特定时刻变形图

Figure 7. Time-history curves of the tip displacement and deformed shape of the tower at specific time points

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图 8 杆件488轴向应力时程图

Figure 8. Axial force time-history curve of element488

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图 9 轴向应变峰值沿高度分布图

Figure 9. Peak axial strain along the height of the tower

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图 10 位移峰值沿高度分布图

Figure 10. Peak displacement along the height of the tower

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