| 俯冲带浅壳和上地幔地震水平向位移谱阻尼修正系数模型研究 |
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| 引用本文： | 姜妍旭,陈心锋,刘名吉.俯冲带浅壳和上地幔地震水平向位移谱阻尼修正系数模型研究[J].世界地震工程,2022,38(1):190-202. |
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| 作者姓名： | 姜妍旭 陈心锋 刘名吉 |
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| 作者单位： | 山东建筑大学 土木工程学院, 山东 济南 250000 |
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| 基金项目： | 国家自然科学基金项目(51878396)。 |
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| 摘 要： | 考虑场地条件的影响，采用固定效应方法对日本K-NET和KiK-Net强震台网获取的6 466条浅壳和上地幔地震记录的统计分析，建立水平向位移谱阻尼修正系数模型。该模型基于13个阻尼比和36个谱周期，使用随机效应模型分离出残差及其对应标准差，用来评估地震动参数对模型的影响。研究表明:以阻尼比对数值为自变量的简单二次函数可以很好的模拟阻尼比的影响；事件间残差与断层深度和震级有相关性，事件内残差与震源距显著相关；在谱周期0.01～5.0 s内，震源效应的影响显著小于其他效应引起的误差。而在大部分谱周期中，路径效应及其他效应引起的误差最大。该研究可用于调整不考虑地震动参数的设计谱。
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| 关 键 词： | 阻尼修正系数 位移反应谱 浅壳和上地幔地震 残差标准差 随机效应模型 |
Study on damping modification factor for horizontal displacement spectrum for shallow crustal and upper-mantle earthquakes in subduction zone in Japan |
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| JIANG Yanxu,CHEN Xinfeng,LIU Mingji.Study on damping modification factor for horizontal displacement spectrum for shallow crustal and upper-mantle earthquakes in subduction zone in Japan[J].World Information On Earthquake Engineering,2022,38(1):190-202. |
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| Authors: | JIANG Yanxu CHEN Xinfeng LIU Mingji |
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| Institution: | School of Civil Engineering, Shandong Jianzhu University, Jinan 250000, China |
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| Abstract: | Damping modification factors based on the horizontal components of 6466 strong-motion records from shallow crustal and upper-mantle earthquakes in Japan are presented. The model adopts the fixed effect method and considers the influence of site conditions. This model was constructed based on the spectrum for 13 damping ratios and 34 spectral periods. The random effect model is used to separate the residual and the corresponding standard deviation，which can evaluate the influence of ground motion parameters on the model. The results show that the effect of damping ratio could been modeled by a quadratic function of the normalized damping ratio in the logarithm. Residual analyses show that the between-event residuals are significantly correlated with magnitude and fault depth and the correlation between within-event residuals and the source distance is significant. In a spectral period range of 0.01s～5.0s，the random error caused by the focal mechanism is significantly smaller than that caused by that other effects，and the random error caused by path effect accounts for the largest proportion in the whole cycle .This study can be used to adjust the design spectrum without a known magnitude and a source distance. |
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| Keywords: | damping modification factor displacement response spectra shallow crustal and upper-mantle earthquakes residual standard deviation random effect model |
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