| 工程地震动随机功率谱模型的分析与改进 |
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| 引用本文： | 李英民,刘立平,赖明. 工程地震动随机功率谱模型的分析与改进[J]. 工程力学, 2008, 25(3): 43-49 |
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| 作者姓名： | 李英民 刘立平 赖明 |
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| 作者单位： | 重庆大学土木工程学院,重庆,400045;重庆大学山地城镇建设与新技术教育部重点实验室,重庆,400045;重庆大学土木工程学院,重庆,400045;重庆大学山地城镇建设与新技术教育部重点实验室,重庆,400045;重庆交通科研设计院结构动力所,重庆,400067;建设部科技司,北京,100835 |
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| 基金项目： | 国家自然科学基金 , 教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 地震动模型的多样化增加了工程应用中地震动输入的选择机会,同时也增大了选择的难度。首先对常用的地震动功率谱模型进行了系统综述,提出地震动功率谱模型应满足地震动过程能量有限和零频含量为零的基本条件,对比分析了9种常用随机功率谱模型的滤波特性和能量有界性,结合地震动功率谱模型的基本要求,给出了建议的地震动功率谱模型,并对其合理性进行了分析。
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| 关 键 词： | 地震动 功率谱 模型化 地震工程 随机振动 |
| 文章编号： | 1000-4750(2008)03-0043-06 |
| 修稿时间： | 2006-07-27 |
ANALYSIS AND IMPROVEMENT OF POWER RANDOM SPECTRA OF STRONG GROUND MOTIONS FOR ENGINEERING PURPOSE |
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| LI Ying-min,LIU Li-ping,LAI Ming. ANALYSIS AND IMPROVEMENT OF POWER RANDOM SPECTRA OF STRONG GROUND MOTIONS FOR ENGINEERING PURPOSE[J]. Engineering Mechanics, 2008, 25(3): 43-49 |
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| Authors: | LI Ying-min LIU Li-ping LAI Ming |
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| Abstract: | There are lots of proposed analytical models for strong ground motions, but it is difficult to choose a befitting one. Therefore, in the view point of practical engineering, the power random spectra of strong ground motions are summarized. Then the consideration of two basic conditions (the energy of strong ground motions is finite and the power random spectrum is zero when the frequency is zero, which are necessary to power random spectra of strong ground motions) is taken. Based the two basic conditions and the analytical result of 9 power random spectrums, an improved power spectrum of strong ground motions model is putted forward, and the rationality of the improved power spectrum is analyzed. |
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| Keywords: | strong ground motions power spectrum modeling earthquake engineering random vibration |
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