| 盛金马,韩承永,张壮,肖俊俊,常江,蔡冰冰.110kV 双回路窄基角钢塔结构抗震分析[J].安徽建筑大学学报,2019,27(1):22-27 |
| 110kV 双回路窄基角钢塔结构抗震分析 |
| Anti-seismic Analysis of Narrow-base Angle Steel Towerwith 110kV Double-loop |
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| DOI： |
| 中文关键词: 双回路窄基角钢塔 有限元法 模态分析 地震时程分析 |
| 英文关键词: Double-loop narrow-base angle steel tower Finite element method Modal analysis Seismic time-history analysis |
| 基金项目:国家自然科学基金资助项目(11272111) |
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| 中文摘要: |
| 本文以安徽宿州某一输电线路双回路窄基角钢塔SJZJT 为研究背景，建立了合理的力学模型，利用
有限元法研究了该塔的动力特性。通过对窄基塔的模态振型分析，得到结构前若干阶自振周期，其第一阶周
期与来自试验的经验公式和《建筑结构荷载规范》(GB 50009-2012)中的规范值相比较，前者结果与本文结果
相比吻合，后者偏差较大。通过输入了垂直于导线方向的El-Centro 波和Kobe 波，对该塔进行了动力时程分
析，分析对比了地震工况下塔顶处位移时程曲线和4 个横担处最大位移值，其中Kobe 地震波工况对窄基塔的
影响较大。对比分析了不同横隔面输电塔模型在Kobe 波作用下的位移响应，得到在输电塔底部增加横隔面会
提高输电塔的抗震性能。本文结果为窄基角钢塔的研究提供了参考。 |
| 英文摘要: |
| Abstract：In this paper，the dynamic characteristics of a double-loop narrow-base angle steel tower were studied from
the transmission power engineering in Suzhou of Anhui. The reasonable mechanical model of the tower was established.
The useful several natural periods of vibration of the tower is achieved by modal analysis with the finite element method.
Then compared the first natural period from the present approach with the computed values of the empirical formula
from the test of typical angle steel tower and high building design code，the result of the former agrees with one of the
present paper and one of the latter is wrong. Then the seismic time-history analysis of the narrow-base angle steel tower
is done by inputting the El-Centro wave and Kobe wave along X direction which is perpendicular to the transmission
line. The displacement of time-history curve at the top of the tower and the maximum displacement of the four cross
arms are given. The computed results demonstrate that Kobe wave has a much greater influence for the tower. The displacement
response of different transversal transmission tower model under Kobe wave is analyzed，and the seismic performance of the transmission tower is improved by increasing the transverse plane at the bottom of the transmission tower.
The results of the present paper provide some references for the research of the angle steel tower. |
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