| 大跨越输电塔-线体系的近场脉冲型地震反应分析 |
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| 引用本文： | 武钢,翟长海,李爽,谢礼立.大跨越输电塔-线体系的近场脉冲型地震反应分析[J].工程力学,2013,30(6):77-82. |
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| 作者姓名： | 武钢 翟长海 李爽 谢礼立 |
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| 作者单位： | 1.哈尔滨工业大学土木工程学院，黑龙江150090; |
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| 基金项目： | 国家自然科学基金项目(90815014，51078117)；地震行业科研专项(201208013)；黑龙江省重点科技攻关项目(GB06C102) |
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| 摘 要： | 分析了大跨越输电塔-线体系的动力特性，对比了大跨越输电塔-线体系的近-远场地震反应，研究了大跨越塔-线体系的近场脉冲地震反应规律。结果表明在同幅值的近场脉冲型地震动作用下，大跨越输电塔-线体系的动力反应远大于其在一般地震动下的反应，大跨越输电塔-线体系的近场脉冲型地震反应幅值随地震动脉冲周期增大而增大。将等效脉冲模型引入大跨越输电塔-线体系近场响应分析，结果表明:塔-线体系在等效脉冲作用下的响应与实际地震动相近，将等效脉冲用于分析大跨越输电塔-线体系的地震响应能够弥补实际近场脉冲型地震动数目过少的不足。
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| 关 键 词： | 输电塔 大跨越 近场 导线 地震反应 |
| 收稿时间： | 2013-06-27 |
SEISMIC RESPONSE OF LARGE CROSSING TRANSMISSION TOWER-LINE SYSTEM SUBJECTED TO NEAR-FAULT GROUND MOTIONS |
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| Affiliation: | 1.School of Civil Engineering,Harbin Institute of Technology,Heilongjiang 150090,China;2.Institute of Engineering Mechanics,China Earthquake Administration,Heilongjiang 150080,China |
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| Abstract: | Dynamic characteristics of a large crossing transmission tower-line system (LCTTL) are analyzed.The seismic responses of a large crossing transmission tower-line system subjected to near-fault pulse-like ground motions and ordinary ground motions are compared.The characteristics of responses caused by near-fault pulse-like ground motions are presented.It is shown that the seismic responses of LCTL induced by near-fault pulse-like ground motions are severer than the responses subjected to ordinary ground motions.The amplitude of seismic responses increases with the pulse period of near-fault pulse-like ground motions.An equivalent pulse model is introduced to seismic response evaluation of LCTL.The results demonstrate that the equivalent pulse model can capture the important response characteristics of the near-fault records.The application of equivalent pulse model in seismic responses analysis of LCTL can augment the number of near-fault record set. |
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