海底长周期地震动预测模型：以日本相模湾海域为例

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (5) : 188-201.

论文

田浩1,2,3,胡进军1,2,谭景阳1,2,靳超越3，刘名吉1,2

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Long-period ground motion prediction model for submarine: a case study of Sagami Bay area in Japan

TIAN Hao1,2,3,HU Jinjun1,2,TAN Jingyang1,2,JIN Chaoyue3,LIU Mingji1,2

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摘要

地震动反应谱预测模型是地震危险性分析的基础，基于日本K-NET台网相模湾地区的892组海域地震动数据和4033组陆域地震动数据，考虑震级、震源距、震源深度以及震源类型和场地，建立了PGA和0.05～15.0 s的海域地震动加速度反应谱预测模型。通过残差分析以及相关性分析检验了模型的合理性，并分析了震源类型以及震源深度对反应谱的影响，对比了海陆地震动预测模型的差异。结果表明：震源类型以及震源深度对模型预测结果影响显著，水平向海域模型以及长周期（T>1.0 s）竖向海域模型所预测反应谱大于陆域模型所预测的反应谱值，且水平向和长周期竖向模型的场地放大系数均大于1。本模型可为长周期海域地震动模型的建立和概率地震危险性分析提供参考，为长周期海域工程的抗震设防提供依据。

Abstract

The prediction model of ground motion response spectrum is the foundation of seismic hazard analysis.Here,based on 892 sets of offshore ground motion records and 4 033 sets of onshore ground motion records from Japanese K-NET network in Sagami Bay area,considering magnitude, hypocentral distance,focal depth as well as source type and site, the prediction models of peak ground acceleration (PGA) and acceleration response spectra (SAs) at 0.05-15.0 s of offshore ground motion were established. The rationality of models was verified with residual analysis and correlation analysis,and effects of source type and focal depth on response spectra were analyzed.Differences between offshore and onshore ground motion prediction models were compared.The results show that source type and focal depth affect the models’ prediction results significantly; SAs predicted using the horizontal offshore model and the long-period (T≥10 s) vertical offshore model are larger than those predicted using the onshore model,and site amplification coefficients of the horizontal model and the long-period vertical model are both larger than 1.The established model can provide a reference for establishing long-period offshore ground motion models and probabilistic seismic hazard analyses,and provide a basis for aseismic fortification of long-period offshore engineering projects. 

导出引用

田浩1,2,3,胡进军1,2,谭景阳1,2,靳超越3，刘名吉1,2. 海底长周期地震动预测模型：以日本相模湾海域为例[J]. 振动与冲击, 2024, 43(5): 188-201

TIAN Hao1,2,3,HU Jinjun1,2,TAN Jingyang1,2,JIN Chaoyue3,LIU Mingji1,2. Long-period ground motion prediction model for submarine: a case study of Sagami Bay area in Japan[J]. Journal of Vibration and Shock, 2024, 43(5): 188-201

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