地震工程学报2025，Vol.47Issue(3)：631-641,11.DOI:10.20000/j.1000-0844.20231202001
地表/井下加速度反应谱比值与地脉动HVSR相关性研究
Correlation between surface/borehole response spectral ratio and microtremor HVSR
摘要
Abstract
Despite the lack of a robust theoretical foundation,the horizontal-to-vertical spectral ratio(HVSR)method of microtremor Fourier amplitudes has become a widely used tool for esti-mating site parameters and analyzing seismic site effects.This study refines the microtremor HVSR approach and introduces a novel empirical method for estimating the surface/borehole acceleration spectral ratio(SBSRa)under ground motions.The proposed method facilitates the estimation of ground motion amplification factors using in situ microtremor observations,offer-ing critical data for seismic site effect research.Drawing on 296 958 strong motion acceleration records from 699 stations in Japan's KiK-net network,stable microtremor HVSRs were extracted from pre-event microtremor data(prior to P-wave arrivals).Statistical analysis revealed a strong correlation between microtremor HVSR and SBSRa under weak ground motions,with their spec-tral shapes and predominant frequencies showing high consistency.Using a frequency normaliza-tion approach,empirical correction coefficients were derived for various types of microtremor HVSR,leading to the development of a practical method for predicting SBSRa based on micro-tremor HVSR.Reliability analyses demonstrated that the predicted SBSRa achieves engineering-level accuracy,with Jaccard similarity coefficients exceeding 0.58 for more than 75％of the sta-tions.These results validate the effectiveness of microtremor HVSR as a reliable proxy for approximating SBSRa under weak ground motions.关键词
地震动/场地效应/地表/井下反应谱比值/地脉动HVSR/强震动记录Key words
ground motion/site effect/surface/borehole response spectral ratio/microtremor HVSR/strong motion records分类
天文与地球科学引用本文复制引用
王玉石,张雅琼,李小军,李敏,段建斌..地表/井下加速度反应谱比值与地脉动HVSR相关性研究[J].地震工程学报,2025,47(3):631-641,11.基金项目
国家重点研发计划课题(2022YFC3003503) （2022YFC3003503）
浙江省地震局科技项目(2023zjj04) （2023zjj04）
