俯冲带板间非设定地震的水平与竖向加速度反应谱比模型  

Model for H/V acceleration response spectral ratio for non-scenario earthquakes from the subduction interface

作　　者：王乐添 何瑾 侯瑞彬 Wang Letian;He Jin;Hou Ruibin(School of Civil Engineering,Shandong Jianzhu University,Jinan 250010,China;School of Architecture and Civil Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]山东建筑大学土木工程学院,中国济南250010 [2]西华大学建筑与土木工程学院,成都610039

出　　处：《地震学报》2025年第2期269-283,共15页Acta Seismologica Sinica

基　　金：国家自然科学基金(51578470)资助。

摘　　要：基于日本KiK-net和K-NET台网所获取的59次俯冲带板间地震的3048条强震记录,采用随机效应算法和数理统计方法,分析了地震类型、谱周期、场地条件等因素对水平与竖向加速度(H/V)反应谱比的影响,并建立了俯冲带板间非设定地震(不包含震源项、路径项等参数)的H/V反应谱比模型,用于调整无震源、无路径信息时的工程抗震设计反应谱。研究结果表明:(1)地震类型和场地类别对H/V反应谱比均存在显著影响,H/V反应谱比的峰值周期与各类别场地的平均场地周期接近,预测模型的H/V反应谱比峰值周期与场地的卓越周期具有一定的相关性;(2)路径效应项和场地效应项的随机误差对H/V反应谱比离散程度的贡献随谱周期的增加而不断增大,场地效应的贡献在各类场地的平均场地周期处最大。为便于工程应用,模型中未加入震源和路径参数,残差分析表明震源特性和传播路径仍会对H/V反应谱比产生影响,当有明确的地震信息时,引入震级、断层距、断层深度等因素可进一步提高模型预测精度。Vertical ground motions acceleration response spectrum is an important part of the structural seismic design,and the domestic and foreign seismic design codes use the H/V response spectrum ratio to calculate the vertical ground motion response spectrum indirectly,which is a simple and feasible method,but the current seismic codes are still too rough for the vertical ground motions response spectrum,which will underestimate the role of vertical component in the engineering application or will result in redundancy in the application.In addition,the geological structure of the subduction zone is complex and earthquakes occur frequently,and the interface earthquakes have the characteristics of high magnitude and high intensity,so it is necessary to study the interface earthquakes in the subduction zone separately.In this paper,based on the surface observation data obtained from the KiK-net and K-NET in Japan,the data are first preprocessed so as to improve the accuracy of the model and to eliminate the seismic records that affect the fitting effect,which involves filtering the magnitude and the fault distance of the data,checking the acceleration time history,then correcting the instrumental response and filtering the waveforms.Finally,3048 seismic records from 59 interface earthquakes in subduction zones are selected for the study,and the acceleration response spectra are calculated for each record with 5%damping ratio.Random-effects algorithms and mathematical statistics were used to analyze the effects of spectral period,earthquake type and site conditions on the H/V response spectral ratio.Based on the site period Ts division of site classes,the H/V response spectrum ratio model for non-scenario earthquakes(without source and path parameters)from the subduction interface is established,the model coefficients are smoothed and adjusted to facilitate engineering applications,and the standard deviation of model residuals is evaluated and analyzed to explore the magnitude and source of random residuals and to improve

关 键 词：H/V反应谱比 俯冲带板间地震 残差 标准差 随机效应模型 

分 类 号：P315.9[天文地球—地震学]