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Time derivative of earthquake acceleration 被引量:4

Time derivative of earthquake acceleration
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摘要 Unlike acceleration, velocity, and displacement, the time derivative ofacceleration (TDoA) of ground motion has not been extensively studied. In this paper, the basiccharacteristics of TDoA are evaluated based on records from the 1999 Chi-Chi, earthquake (Mw 7.6)and one of its aftershocks (Mw 6.2). It is found that the maximum TDoA at a free-field station wasover 31,200 cm/s3 (31.8 g/s); and the duration of 'strong' TDoA, between the first and the last timepoints exceeding 2,000 cm/s3 (2 g/s), was almost one minute near the epicenter area. Since groundTDoA sensors are not commonly available, the time series are calculated by direct numericaldifferentiation of acceleration time series. Relative error analysis shows that the error isnon-transitive and total error is within 4%. The density function of TDoA amplitude, frequencycontent and spatial distribution of peak ground jerk (PGJ) are evaluated. The study also includesexamination of some TDoA responses from a seven-story building and comparison of ground TDoA withthe limit TDoA used in the transportation industry for ride comfort. Some potential impacts of TDoAon humans have also been reviewed. Unlike acceleration, velocity, and displacement, the time derivative ofacceleration (TDoA) of ground motion has not been extensively studied. In this paper, the basiccharacteristics of TDoA are evaluated based on records from the 1999 Chi-Chi, earthquake (Mw 7.6)and one of its aftershocks (Mw 6.2). It is found that the maximum TDoA at a free-field station wasover 31,200 cm/s3 (31.8 g/s); and the duration of 'strong' TDoA, between the first and the last timepoints exceeding 2,000 cm/s3 (2 g/s), was almost one minute near the epicenter area. Since groundTDoA sensors are not commonly available, the time series are calculated by direct numericaldifferentiation of acceleration time series. Relative error analysis shows that the error isnon-transitive and total error is within 4%. The density function of TDoA amplitude, frequencycontent and spatial distribution of peak ground jerk (PGJ) are evaluated. The study also includesexamination of some TDoA responses from a seven-story building and comparison of ground TDoA withthe limit TDoA used in the transportation industry for ride comfort. Some potential impacts of TDoAon humans have also been reviewed.
作者 George C. Lee
出处 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2005年第1期1-16,共16页 地震工程与工程振动(英文刊)
基金 National Science Foundation Under Grant No.CMS-0202846
关键词 time derivation of acceleration peak ground jerk acceleration time series earthquake ground motion earthquake effect on human activities time derivation of acceleration peak ground jerk acceleration time series earthquake ground motion earthquake effect on human activities
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参考文献11

  • 1戴君武,Mai Tong,George C.Lee,齐霄斋,白文婷.Dynamic responses under the excitation of pulse sequences[J].Earthquake Engineering and Engineering Vibration,2004,3(2):157-169. 被引量:8
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二级参考文献8

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  • 8Paret,TF,Borchardt,G.Northward Lean of Wood- and Steel-frame Structures as Evidence for the Near-source Directivity Pulse Produced by the 1994 Northridge Earthquake [abs.][].Seismological Research Letters.1995 被引量:1

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