文章摘要
贾晓辉,叶迎晨,冯向东,王晓山.山地与平原地形对地震动影响的对比分析[J].地震工程学报,2020,42(1):242-249. JIA Xiaohui,YE Yingchen,FENG Xiangdong,WANG Xiaoshan.Comparison of the Effects of Mountainous Regionsand Sedimentary Plains on Ground Motion[J].China Earthquake Engineering Journal,2020,42(1):242-249.
山地与平原地形对地震动影响的对比分析
Comparison of the Effects of Mountainous Regionsand Sedimentary Plains on Ground Motion
投稿时间:2017-04-18  
DOI:10.3969/j.issn.1000-0844.2020.01.242
中文关键词: 强震动记录;地形效应;沉积平原;长周期地震动
英文关键词: strong motion records;terrain effect;sedimentary plain;long-period ground motions
基金项目:中国地震局地震科技星火计划项目(XH20006Y);河北省地震局地震科技星火计划项目(DZ20170328007,DZ2018319009,DZ20180316003)
作者单位
贾晓辉 河北省地震局, 河北 石家庄 050021
中国地震局地球物理研究所, 北京 100081 
叶迎晨 中国地震局地球物理研究所, 北京 100081 
冯向东 河北省地震局, 河北 石家庄 050021 
王晓山 河北省地震局, 河北 石家庄 050021
中国地震局地球物理研究所, 北京 100081 
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中文摘要:
      山地和平原地形在破坏性地震中对震害和地震动有很大影响,不同地形对地震动有不同的地形效应。为研究山地和平原地形对地震动的影响规律,基于集集地震后续ML6.6余震的强震观测记录,对位于不同地形且与震中位于同一直线上的四个强震台记录处理计算,从波形特征、频谱分析、加速度反应谱计算、与规范谱比较等方面进行对比分析,完成长周期地震动反应谱分布的计算。研究表明,山地地形对地震动的高频成分有地形放大效应,沉积平原对地震动的低频长周期部分有放大作用,并且长周期反应谱的峰值区域始终位于沉积平原中部。平原上强震记录产生的长周期放大系数谱已超出规范谱,沉积平原上长周期建筑的抗震设防应引起重视。
英文摘要:
      Mountainous regions and sedimentary plains have different amplification effects on the strong ground motions and damage arising from destructive earthquakes. To obtain the influence rules of these two terrains, based on the strong-motion records from the ML6.6 aftershock of the Chi-Chi earthquake, we processed and analyzed records from four strong-motion stations located in different terrains and along the same line with the epicenter. Then, we compared and analyzed the calculation results from many aspects and obtained the distribution of the long-period response spectra of ground motion. The results show that the high-frequency components of the input earthquake motion are amplified by a mountainous region, and the long-period components of the input earthquake motion are amplified by a sedimentary plain. We found the peak value of the long-period response spectrum located in the middle of the sedimentary plain. The long-period amplification coefficient spectra of the strong-motion records on the sedimentary plain are beyond the range of the seismic design code. Consequently, more attention should be paid to the seismic fortification of high-rise buildings on sedimentary plains.
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