地震学报Issue(3)：463-472,10.DOI:10.11939/jass.2015.03.009
基于反卷积干涉法的土层地震反应特性研究
Soil response characteristics to earthquakes based on deconvolution interferometry
摘要
Abstract
Seismic interferometry technique was used to extract the shear wave velocity and damping ratio of the soil at the Delaney Park,Anchorage Alaska from the measured soil response to ten earthquakes.The soil response is record-ed by a geotechnical array.This array consists of a surface and six borehole sta-tions equipped with a tri-axial accelerometer each.Deconvolution of the wave-forms recorded by the borehole accelerometers at various depths with the wave-form recorded at the surface accelerometer manifests an upward and a downward travelling wave in the soil.The arrival times to each accelerometer are obvious so that the entire travel time and time differences are extracted from the decon-volved waveforms.The shear wave velocity and its profile estimated from the deconvolution analysis agree reasonably well with in-situ measurements.The predominant frequencies are also inferred from the shear wave velocity and they are basically consistent for the ten earthquakes.The damping ratio is similarly investigated from the amplitude attenuation of the upward and the downward travelling waves.The value of damping ratio coincides with the empirical damp-ing ratio of the soft clay as well.Analysis indicates that wave deconvolution can be used to extract the soil response and its characteristics.关键词
土层反应/波动传播/反卷积分析/等效剪切波速/卓越频率/阻尼比Key words
soil response/wave propagation/deconvolution analysis/equivalent shear wave velocity/predominant frequency/damping ratio分类
天文与地球科学引用本文复制引用
王飞,Kalkan Erol,任志林..基于反卷积干涉法的土层地震反应特性研究[J].地震学报,2015,(3):463-472,10.基金项目
中国地震局青年科技骨干人才项目（201204190030）资助． （）
