基于谱比法的近海地震动S-net台站场地分类研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (1) : 90-101.

振动理论与交叉研究

基于谱比法的近海地震动S-net台站场地分类研究

王时1,2，王想*1,2，胡磊3,周旭彤4

作者信息 +

Site classification for offshore ground motion S-net stations based on spectral ratio method

WANG Shi1,2, WANG Xiang*1,2, HU Lei3, ZHOU Xutong4

Author information +

文章历史 +

摘要

近海台站往往难以获得台站场地资料，并且海域场地工程特性是海洋重大工程设计、建造和运维的基础，也是研究海域地震动场地放大的重要参数。为了解决这一问题，本文基于日本海沟区域的S-net台网的150个台站的强地震动数据，得到了埋置和未埋台站的H/V谱比曲线并进行了场地分类。结果表明：海域的H/V谱比曲线有较大谱比值；各个场地类别的埋置和未埋台站的H/V谱比曲线在谱比值和谱比形状存在着巨大差异；震级和震中距对长周期的H/V谱比曲线有较大影响，震源深度对H/V谱比曲线几乎没有影响。研究成果可为海域地震动模拟、海域场地效应研究和海洋工程建设等提供参考。

Abstract

The site information of offshore stations is usually difficult to obtain, and the engineering characteristics of marine sites are the important basis for the design, construction, operation and maintenance of major marine projects, as well as an important parameter for the study of site amplification in marine ground motion. To solve this problem, H/V spectral ratio curves of buried and unburied stations are obtained based on strong ground motion data from 150 stations of the S-net station network in the Japan Trench region and site classification is performed in this study. The results show that the offshore H/V spectral ratio curve has a large spectral ratio value. The H/V spectral ratio curves of each site category for buried and unburied stations differ dramatically in spectral ratio values and spectral ratio shapes. The magnitude and epicentral distance have a large effect on the long-periods H/V spectral ratio curves, and the focal depth has barely any effect on the H/V spectral ratio curves. The research results may provide references for the simulation of offshore ground motion, the study of site effects and the construction of marine engineering.

导出引用

王时1, 2, 王想1, 2, 胡磊3, 周旭彤4. 基于谱比法的近海地震动S-net台站场地分类研究[J]. 振动与冲击, 2025, 44(1): 90-101

WANG Shi1, 2, WANG Xiang1, 2, HU Lei3, ZHOU Xutong4. Site classification for offshore ground motion S-net stations based on spectral ratio method[J]. Journal of Vibration and Shock, 2025, 44(1): 90-101

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