Ground Motion Characteristics of Horizontal Layered Site Based on SH Wave Oblique Incidence
Based on the displacement field theory and transfer matrix method,this paper deduces the equivalent linearization method of layered site under oblique incidence of SH waves,and studies the variation law of peak acceleration magnification and response spec-trum ratio of horizontal layered site under different angles of SH waves.The results show that the incident angle of seismic waves has obvious influence on the peak acceleration of the ground surface of layered sites.In many cases,the peak acceleration of the ground sur-face under oblique incidence of seismic waves is greater than that under vertical incidence.The response spectrum characteristics change obviously under oblique incidence of seismic waves,and the amplification effect of incident angle on high frequency response spectrum values is very significant.On the spectrum shape surface,the influence range of the period of different site types is different,and the influence range of incident angle on the period of type Ⅲ site is obviously wider than that of type Ⅱ site.
SH waveOblique incidenceThe spectral ratioAmplification effect
万方数据
维普
