不同类型俯冲带地震水平向地震动阻尼修正系数对比研究  

Comparison of damping modification factors for the horizontal ground motions from different types of earthquakes in subduction zones

作　　者：康莉莉 刘名吉[1] 张洪博 杨青松 KANG Lili;LIU Mingji;ZHANG Hongbo;YANG Qingsong(Shandong Jianzhu University,Jinan 250101,China;Shandong Urban Construction Vocation College,Jinan 250101,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]山东城市建设职业学院,济南250101 [3]西南交通大学土木工程学院,成都610031

出　　处：《世界地震工程》2021年第2期183-191,共9页World Earthquake Engineering

基　　金：国家自然科学基金项目(51878396)。

摘　　要：基于日本KiK-Net、K-Net地震台网和太平洋地震工程中心(PEER)的14713条地震动记录,比较了俯冲带地区浅壳上地幔地震、板内地震和板间地震的水平向地震动加速度反应谱阻尼修正系数(DMF)和位移反应谱阻尼修正系数(DMF)的差异,并进行了5%置信水平下的假设检验,探究了俯冲带地区不同地震类型对DMF的影响。结果显示:在大多数谱周期,不同地震类型的DMF存在统计意义上的显著差异;在低阻尼比中短周期时,加速度谱DMF和位移谱DMF基本相同;在高阻尼比长周期时,不同地震类型的加速度谱DMF差异大于位移谱DMF差异。研究表明:俯冲带地震水平向地震动DMF需要考虑不同地震类型的影响。Based on 14713 ground motion records from Japanese KiK-Net,K-net seismic networks and the Pacific Earthquake Engineering Research Center(PEER)record database,this study compared acceleration response spectrum damping modification factor(DMF)and displacement response spectrum DMF between the shallow crustal and upper mantle earthquakes,slab earthquakes and interface earthquakes in subduction zones.The influence of different earthquake types on DMF was investigated in subduction zones through hypothesis testing at 5%confidence level.The results show that DMF of different earthquake types showed statistically significant differences in most spectral periods,the acceleration spectrum DMF and displacement spectrum DMF are basically the same in low damping ratios and short periods,and the difference of acceleration spectrum DMF between different earthquake types is greater than that of displacement spectrum DMF in the case of high damping ratios and long periods.Studies have shown that the influence of different earthquake types should be taken into account in the damping modification factor of horizontal ground motion in subduction zone earthquakes.

关 键 词：水平向阻尼修正系数 反应谱 阻尼比 俯冲带地震 地震类型 

分 类 号：P631.443[天文地球—地质矿产勘探]