作　　者： ; ; ; ;

机构地区： 中国地震局工程力学研究所

出　　处： 《土木工程学报》 2010年第S1期37-41,共5页

摘　　要： 利用584组汶川余震Ⅱ类场地加速度记录,研究震级、震中距对水平向反应谱形状的影响以及竖向反应谱与水平向反应谱的差异。研究表明:①震中距较大时,幅值相同的水平地震动反应谱形状受震级影响较大,震级越大,反应谱峰值越小,峰值周期越大;②竖向与水平向反应谱平均比值V/H与震级相关,V/H值随震级增大有增大趋势,规范中V/H取值应考虑震级影响;③震级较大且距震中较远时,竖向与水平向反应谱平均比值V/H在长周期段大于规范规定值2/3,离震中越远,V/H值越大。 With 584 groups of acceleration records from Wenchuan aftershock,the effects of magnitude and epicenter distance(D) on the spectrum shape of horizontal and vertical ground motion was studied,and the differences between the horizontal and vertical ones was also made.The results show:①when D is relatively large,the effect of Magnitude(Ms) on the spectrum shape of horizontal ground motion with same peak value is deeper.The lager the magnitude is,the smaller the peak value of response spectrum and the larger the spectral characteristic period is;②mean vertical-to-horizontal spectral ratio(V/H) is affected by Ms.Ms tends to increases with V/H increasing,which specified that the effect of Ms on V/H should be considered in code;③when Ms and D are relatively large,V/H overrides 2/3,V/H increases with D increasing.

关 键 词： 汶川余震 震级 震中距 反应谱

领　　域： [天文地球] [天文地球] [天文地球]