基于HVSR方法的上海市典型场地特征研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (11) : 312-319.

论文

赵鹏1,2，韦晓1,3，胡峻1,2

作者信息 +

Typical features of sites in Shanghai based on HVSR method

ZHAO Peng1,2, WEI Xiao1,3, HU Jun1,2

Author information +

文章历史 +

摘要

上海市强震台网获取了2020年5月3日日本九州6.0级地震等多次强震记录。通过对地震记录进行分析处理，分别计算了每个强震台站的H/V谱比曲线，结合上海市地质调查研究院的基岩埋深分布图，得到了每个台站的基阶共振频率与沉积层厚度。结果表明：（1）H/V谱比曲线峰值与沉积层厚度存在明显相关性，并且通过数据拟合建立了上海市沉积层厚度与基阶共振频率的经验公式，绘制了上海市场地基本周期分布图，可以为上海市抗震设防提供一定的参考。（2）厚沉积层场地上地震记录的谱比曲线会出现多个峰值，第二个峰值代表了沉积层的高阶共振频率。（3）通过数据拟合得到上海地区剪切波速与沉积层厚度的经验公式。

Abstract

Shanghai Strong Earthquake Network obtained several strong earthquake records such as the 6.0 magnitude earthquake in Kyushu, Japan, on May 3, 2020. By analyzing and processing the seismic records, the H/V spectral ratio curves of each strong earthquake station are calculated respectively, and the fundamental resonance frequency and sediment thickness of each station are obtained by combining with the distribution map of the buried depth of bedrock of Shanghai Institute of Geological Survey. The results show that: (1) there is an obvious correlation between the peak value of H/V spectral ratio curve and the thickness of the sedimentary layer, and the empirical formula of the thickness of the sedimentary layer and the resonance frequency of the fundamental order in Shanghai is established through data fitting, and the basic period distribution map of the Shanghai market is drawn, which can provide a certain reference for the seismic fortification of Shanghai. (2) There will be multiple peaks in the spectral ratio curve of seismic records on the thick sedimentary layer site, and the second peak represents the higher-order resonance frequency of the sedimentary layer. (3) The empirical formula of shear wave velocity and sediment thickness in Shanghai area is obtained through data fitting.

导出引用

赵鹏1,2，韦晓1,3，胡峻1,2. 基于HVSR方法的上海市典型场地特征研究[J]. 振动与冲击, 2024, 43(11): 312-319

ZHAO Peng1,2, WEI Xiao1,3, HU Jun1,2. Typical features of sites in Shanghai based on HVSR method[J]. Journal of Vibration and Shock, 2024, 43(11): 312-319

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