| Artificial ground motion compatible with specified peak velocity and target spectrum |
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| 作者姓名： | 赵凤新 张郁山 |
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| 作者单位： | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| 基金项目： | National-Natural Science Foundation of China （50278090）. Contribution No.06FE22, Institute of Geophysics, China Earthquake Administration. |
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| 摘 要： | In this paper, a method, which synthesizes the artificial ground motion compatible with the specified peak velocity as well as the target acceleration response spectrum, was proposed. In this method, firstly, an initial acceleration time history α8^（0） （t）, which satisfies the prescribed peak ground acceleration, the target spectral acceleration ST（ω, ζ）,and the specified intensity envelope, is generated by the traditional method that generates the requency domain; secondly,α8^（0） （t）is further modulated by superimposing narrow-band time histories upon it in the time domain to make its peak velocity, approach the target peak ground velocity, and at the same time to improve its fitting precision to the target spectrum. Numerical examples show that this algorithm boasts high calculation precisions.
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| 关 键 词： | 人造地面运动 反应频谱 工程特征 地震 |
| 文章编号： | 1000-9116（2006）04-0461-11 |
| 收稿时间： | 2005-09-12 |
| 修稿时间： | 2006-04-09 |
Artificial ground motion compatible with specified peak velocity and target spectrum |
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| ZHAO Feng-xin,ZHANG Yu-shan.Artificial ground motion compatible with specified peak velocity and target spectrum[J].Acta Seismologica Sinica(English Edition),2006,19(4):461-471. |
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| Authors: | ZHAO Feng-xin ZHANG Yu-shan |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | In this paper, a method, which synthesizes the artificial ground motion compatible with the specified peak velocity as well
as the target acceleration response spectrum, was proposed. In this method, firstly, an initial acceleration time history
a
g
(0)
(t), which satisfies the prescribed peak ground acceleration, the target spectral acceleration S
T(ω, ζ), and the specified intensity envelope, is generated by the traditional method that generates the response-spectrum-compatible
artificial ground motion by modifying the Fourier amplitude spectrum in the frequency domain; secondly, a
g
(0)
(t) is further modulated by superimposing narrow-band time histories upon it in the time domain to make its peak velocity, approach
the target peak ground velocity, and at the same time to improve its fitting precision to the target spectrum. Numerical examples
show that this algorithm boasts high calculation precisions.
Contribution No.06FE22, Institute of Geophysics, China Earthquake Administration. |
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| Keywords: | artificial ground motion acceleration response spectrum peak velocity fitting |
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