Site classification for offshore ground motion S-net stations based on spectral ratio method
Offshore stations often are difficult to obtain station site data.Engineering characteristics of sea area site are the basis for design,construction,operation and maintenance of major marine engineering projects,and they also are important parameters for studying sea area ground motion site amplification.Here,aiming at this problem,H/V spectral ratio curves of buried and unburied stations were obtained based on strong ground motion data from 150 stations of S-net network in Japanese Trench region,and sit classification was performed.The results showed that H/V spectral ratio curves of this sea area have larger spectral ratio values;there are significant differences in spectral ratio value and spectral ratio shape among H/V spectral ratio curves of buried and unburied stations in various site categories;seismic magnitude and epicenter distance more largely affect long-period H/V spectral ratio curves,while the depth of epicenter has almost no effect on H/V spectral ratio curves;the study results can provide a reference for simulating sea area seismic motion,studying sea area site effect and constructing marine engineering.
offshore ground motionspectral ratio methodsea area sitesite classificationS-net
万方数据
维普
