【摘要】 本文采用全球范围128次地震的3235组三分量强地面运动记录,分析了其加速度竖向分量反应谱与水平分量反应谱的比值(V/H)的总体特征,研究了V/H随震级、震中距、局部场地条件和震源机制的变化关系。研究结果表明:(1)场地越硬,长周期段V/H越大,短周期段则相反;(2)震级越大,长周期段V/H越大,短周期段变化不明显;(3)短周期段V/H随震中距增大而减小;(4)对于大震(M>7),长周期段V/H随震中距增大而减小;而对于中强震(M<7),比值在近场(R<60km)随震中距增加而增大,在远场则随震中距增加而减小;(5)V/H与震源机制也有一定的关系。更多还原

【Abstract】 In this paper,3225 strong ground motion records from 128 earthquakes are used to calculate the ratios of the vertical to horizontal acceleration response spectra(V/H).The records are divided into groups according to site condition,epicentral distance,magnitude and focal mechanism.This study focuses on the relationship between V/H and these factors.The results show that:(1) the harder the site is,the larger the V/H in long-period range becomes,and the V/H in short-period range is opposite.(2) The greater the magnitude is,the higher the V/H in long-period range becomes,but the V/H in short period is not impressible.(3) The V/H in short period decreases as epicentral distance increases.(4) For great magnitude(M>7),the V/H in long-period range reduces as the epicentral distance increases.However,for great-moderate earthquakes(M<7),the ratio increases with the epicentral distance in near-field,and it reduces as the epicentral distance increases in far-field.(5) The V/H is also related to focal mechanism.更多还原