微动H/V谱比卓越频率处峰值的概率分布探讨

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中图分类号：P315 文献标志码：A 文章编号：1000-0844（2025）06—1369—12

Abstract： The microtremor horizontal-to-vertical （H/V） spectral ratio method is commonly used to estimate site effects.However，the amplitude of the H/V spectral ratio peak varies significantly depending on factors such as the position and length of the data segment and the smoothing method used.To clarify the characteristics of H/V spectral ratio peak variation with respect to the position of microtremor data segments， microtremor observations were conducted at seven sites in Japan. H/V spectral ratios were calculated for different data segment positions，and the peaks of the H/V spectral ratio curves were statistically analyzed. The results indicate that the H/V spectral ratio peak varies with data segment position and that the degree of variation is influenced by segment length and site-specific factors. Furthermore，statistical analysis revealed that，regardless of segment length or site， H/V spectral ratio peaks follow a type I extreme value distribution. These findings promote the application of the H/V spectral ratio peak in evaluating site amplification effects.

Keywords： microtremor H/V spectral ratio method; H/V spectral ratio peak;microtremor dat： segment position;type I extreme value distribution

0 引言

微动水平/垂直（Horizontal/Vertical，H/V）谱比法是一种用于探测场地结构和评估场地效应的有效方法。（剩余16323字）