地震动空间变化对高压输电塔线体系地震反应的影响

田利;;李宏男;王文明

振动与冲击 ›› 2013, Vol. 32 ›› Issue (8) : 79-87.

PDF(3638 KB)
PDF(3638 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (8) : 79-87.
论文

地震动空间变化对高压输电塔线体系地震反应的影响

  • 田利1, 2,李宏男2,王文明2
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GROUND MOTION SPATIAL VARIATION EFFECTS ON SEISMIC RESPONSE OF POWER TRANSMISSION TOWER-LINE SYSTEM

  • TIAN Li1, 2, LI Hong-nan2, WANG Wen-ming2
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摘要

通过数值模拟研究了地震动空间变化对高压输电塔线体系地震反应的影响。建立了输电塔线耦联体系三维有限元模型,考虑了输电线的几何非线性特征;在考虑地震动的行波效应、部分相干效应和局部场地效应以及多维性基础上,依据功率谱密度函数、相干函数和《电力设施抗震设计规范》模拟了空间变化地震动时程;分别研究了地震动空间变化的行波效应、部分相干效应和局部场地效应对输电塔线体系地震反应的影响。研究结果表明,地震动空间变化对输电塔线体系地震反应影响显著,忽略这些因素将会低估结构的反应。因此对于输电线路实际工程的抗震设计,需要考虑地震动空间变化效应的影响。

Abstract

In this paper, ground motion spatial variation effects on seismic response of power transmission tower-line system are studied by numerical simulation. A three-dimensional finite element model of transmission tower-line coupled system considering the geometric nonlinearity of transmission line is established. Based on wave passage effect, coherency loss effect, different local site effect and multi-dimensional nature of ground motion, spatially varying ground motion time histories are simulated according to power spectral density function, coherency loss function and Code for Design of Seismic of Electrical Installations. The effects of wave passage effect, coherency loss effect and different local site effect on seismic response of transmission tower-line system are investigated, respectively. The results show that ground motion spatial variation effects have significant influence on the seismic response of transmission tower-line system, and neglecting these effects will underestimate the response of structure. Ground motion spatial variation effects should be considered in seismic design of transmission line practical engineering.

关键词

地震动空间变化 / 高压输电塔-线体系 / 行波效应 / 部分相干效应 / 局部场地效应

Key words

ground motion spatial variation / power transmission tower-line system / wave passage effect / coherency loss effect / different local site effect

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导出引用
田利;;李宏男;王文明. 地震动空间变化对高压输电塔线体系地震反应的影响[J]. 振动与冲击, 2013, 32(8): 79-87
TIAN Li;;LI Hong-nan;WANG Wen-ming. GROUND MOTION SPATIAL VARIATION EFFECTS ON SEISMIC RESPONSE OF POWER TRANSMISSION TOWER-LINE SYSTEM[J]. Journal of Vibration and Shock, 2013, 32(8): 79-87

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