| Simulation method of near-fault pulse-type ground motion |
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| 作者姓名： | 田玉基 杨庆山 卢明奇 |
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| 作者单位： | School of Civil Engineering and Architecture Beijing Jiaotong University Beijing 100044 China，School of Civil Engineering and Architecture Beijing Jiaotong University Beijing 100044 China，School of Civil Engineering and Architecture Beijing Jiaotong University Beijing 100044 China |
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| 基金项目： | Foundation item： National Natural Science Foundation of China （50478063） |
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| 摘 要： | Introduction With the development of the economy of China, it is possible to build large-span bridges, pipelines, dams and other lifeline structures in the seismically active regions or through the active faults. In addition, some isolated and energy diss…
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| 关 键 词： | 近断层脉冲型地面运动 地震 模拟方法 高频时程分量 低频时程分量 |
| 文章编号： | 1000-9116（2007）01-0080-08 |
| 收稿时间： | 2006-05-12 |
| 修稿时间： | 2006-12-01 |
Simulation method of near-fault pulse-type ground motion |
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| Tian Yu-ji , Yang Qing-shan and Lu Ming-qi.Simulation method of near-fault pulse-type ground motion[J].Acta Seismologica Sinica(English Edition),2007,20(1):80-87. |
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| Authors: | Tian Yu-ji Yang Qing-shan and Lu Ming-qi |
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| Institution: | (1) School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing, 100044, China |
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| Abstract: | The two characteristics of near-fault ground motions, i.e., the forward directivity effect and permanent displace- ment effect, result in long period and large velocity pulse in the velocity time history and large step pulse in the displacement time history. Considering the two effects, a simple expression of continuous function for equivalent velocity pulse time history is presented in this paper. The equivalent pulse model, in which the pulse period, peak velocity and pulse shape are described by five parameters, is highly advantageous to fit and simulate the pulse-type velocity time history. The equivalent pulse model comprises only one low-frequency component while the high-frequency component of a pulse-type earthquake record cannot be considered. Based on 28 records of 11 earthquakes, the pulse frequency of pulse-type records is generally less than 1 Hz. Therefore the low-frequency component and high-frequency component are simulated respectively and combined them together to generate a pulse-type ground motion. |
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| Keywords: | pulse-type ground motion equivalent velocity pulse low-frequency component high-frequency component |
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