| Characteristics of near-fault ground motion containing velocity pulses |
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| 作者姓名： | 韦韬 赵凤新 张郁山 |
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| 作者单位： | [1]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China [2]Guilin Institute of Technology, Guilin 541004, China |
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| 基金项目： | National-Natural Science Foundation of China （50278090）. Contribution No. 06FE3027, Institute of Geophysics, China Earthquake Administration. |
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| 摘 要： | There are many reports about the research on near-fault velocity pulses, which focus on the generation of velocity pulse and simplify the velocity pulse so as to be used in the seismic design of structure, However few researches have put emphasis on the characteristics of near-fault ground motions containing velocity pulses, especially the characteristics relevant with the design response spectrum prescribed by the code. Through collection of a large number of near-fault records containing velocity pulses, the response spectra and the characteristic periods of records containing no pulses are compared with those of records containing pulses. Response spectra of near-fault records are compared with standard spectra given by code; furthermore, the response spectra and the characteristic periods of each earthquake are compared with that given by code. The result shows that at long periods （longer than 1.5 s）, the response spectrum of pulse-containing records is bigger than the response spectrum of no-pulse-containing records; when the characteristic period of near-fault records is calculated, the method that does not fix frequency is more reasonable because the T1 and T2 have a lagging tendency; regardless of the site Ⅰ and site Ⅱ, the characteristic period of pulse-containing records is over twice bigger than the characteristic period given by the code,
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| 关 键 词： | 地震 断层 地面运动 反应光谱 |
| 文章编号： | 1000-9116（2006）06-0677-10 |
| 收稿时间： | 2006-02-02 |
| 修稿时间： | 2006-07-26 |
Characteristics of near-fault ground motion containing velocity pulses |
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| WEI Tao,ZHAO Feng-xin,ZHANG Yu-shan.Characteristics of near-fault ground motion containing velocity pulses[J].Acta Seismologica Sinica(English Edition),2006,19(6):677-686. |
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| Authors: | WEI Tao ZHAO Feng-xin ZHANG Yu-shan |
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| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;Guilin Institute of Technology, Guilin 541004, China
2. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | There are many reports about the research on near-fault velocity pulses, which focus on the generation of velocity pulse and simplify the velocity pulse so as to be used in the seismic design of structure. However few researches have put emphasis on the characteristics of near-fault ground motions containing velocity pulses, especially the characteris-tics relevant with the design response spectrum prescribed by the code. Through collection of a large number of near-fault records containing velocity pulses, the response spectra and the characteristic periods of records containing no pulses are compared with those of records containing pulses. Response spectra of near-fault records are compared with standard spectra given by code; furthermore, the response spectra and the characteristic periods of each earth-quake are compared with that given by code. The result shows that at long periods (longer than 1.5 s), the response spectrum of pulse-containing records is bigger than the response spectrum of no-pulse-containing records; when the characteristic period of near-fault records is calculated, the method that does not fix frequency is more reasonable because the T1 and T2 have a lagging tendency; regardless of the site I and site II, the characteristic period of pulse-containing records is over twice bigger than the characteristic period given by the code. |
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| Keywords: | near-fault velocity pulse ground motion response spectrum characteristic period |
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