基于首次超越破坏的输电塔强风易损性分析

赵子涵; 肖凯; 肖仪清; 李朝; 张文通

doi:10.13204/j.gyjzG20121012

基于首次超越破坏的输电塔强风易损性分析

doi: 10.13204/j.gyjzG20121012

1. 深圳职业技术学院建筑工程学院, 广东深圳 518055;
2. 广东电网公司电力科学研究院, 广州 510080;
3. 哈尔滨工业大学(深圳)土木与环境工程学院, 广东深圳 518055

基金项目:

国家重点研发计划资助(2018YFC0705605)

广东电网公司科技项目(GDKJQQ20153009)。

详细信息

作者简介:
赵子涵,男,1993年出生,讲师。电子信箱:zhaozihan319@qq.com

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- 文章访问数: 108
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-10
- 网络出版日期: 2023-07-01

Fragility Analysis of Transmission Towers with a Strong Wind Based on First-Passage Failure Criterion

1. Department of Civil Engineering, Shenzhen Polytechnic, Shenzhen 518055, China;
2. Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China;
3. Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China

摘要

摘要: 参照输电塔现行设计规范,首先,获得了风荷载作用下单塔结构的能力曲线,并依据结构构件的受力特征,以塔顶位移角为指标讨论了3种首次超越破坏的界限状态。其次,基于拉丁超立方抽样技术获得的结构等效静力计算样本,对界限值划分的合理性进行验证。最后,结合不确定分析样本的统计特性,计算塔架在最不利风向角下,不同顶点位移角限值的易损性曲线,并对比了采用动力可靠性分析获得的"三塔两线"体系计算结果。HCLPF(High Confidence, Low Probability of Failure)对应风速值表明,不同方法的计算结果较为接近,但单塔结构计算效率较高。
- 输电塔 /
- 能力曲线 /
- 易损性曲线 /
- HCLPF /
- 首次超越破坏
Abstract: The capacity curves of lattice transmission towers under wind loading were first calculated based on current design codes. According to the stress characteristics of structural components, three performance indexes under the first-passage failure criterion were discussed by using the displacement angle of the tower top as an indicator. Then, these indexes were validated by implementing the statistical analysis based on the Latin Hypercube Sampling (LHS) of equivalent static calculation. Thirdly, the fragility curves under unfavorable wind directions were calculated with the uncertain characteristics of the vertex displacement angle. These results were validated with an overhead transmission line-tower system by using the first-passage failure theory. Wind speeds corresponding to the HCLPF (High Confidence, Low Probability of Failure) results showed that the results under different methods were very close to each other, but the LHS approach had higher calculation efficiency.
- transmission tower /
- capacity curve /
- fragility curve /
- HCLPF /
- first-passage failure

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参考文献(20)

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