Effects and mechanisms of ground vibration randomness on peak surface acceleration

QI Wenhao; CHEN Fangxiao; LI Linfang; ZHANG Xiankai

doi:10.11779/CJGE2023S20007

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 7-12. > DOI: 10.11779/CJGE2023S20007

QI Wenhao, CHEN Fangxiao, LI Linfang, ZHANG Xiankai. Effects and mechanisms of ground vibration randomness on peak surface acceleration[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 7-12. DOI: 10.11779/CJGE2023S20007

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Effects and mechanisms of ground vibration randomness on peak surface acceleration

QI Wenhao^{1, 2,},
CHEN Fangxiao^{1, 2},
LI Linfang^{1, 2},
ZHANG Xiankai^{1, 2}

1.
Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
2.
Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management, Harbin 150080, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

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Abstract

Abstract

The randomness of artificial seismic vibration has important influences on the peak value of ground acceleration. Based on the results of soil layer shear wave velocity and soil body nonlinear statistics, three soil layer seismic response models are established. Taking the typical bedrock acceleration response spectrum of Heilongjiang region as the target one, 400 random seismic acceleration intervals are synthesized manually by 400 different random numbers for each target spectrum. Through the experience of soil layer seismic response, 10800 peak ground acceleration results are obtained from the three models. The distribution characteristics and differences of acceleration peaks under each target spectrum are analyzed statistically, and the reasons for this difference are explained preliminarily by comparing the Fourier spectrum with target response one. The results show that under the same profile and target response spectrum, there is a certain difference in the peak value of ground surface acceleration obtained by different random numbers, which shows a normal distribution. This difference is positively correlated with the response spectral value of the seismic targets corresponding to the Fourier spectrum peak periods of the surface earthquakes.
- random number,
- artificial ground motion,
- peak acceleration,
- response spectrum,
- Fourier spectrum

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References (20)

References

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