A Comparative Centrifuge Test Study on the Influence of Overlying Seawater on Seismic Response Spectrum

In this study, dynamic centrifugal model tests for two homogeneous saturated soft clay sites are designed to analyze the influence of overlying sea water on ground motion. We obtain response spectrum value and amplification coefficient from acceleration sensor records. Through comparative analysis, we conclude that with increase in input peak motion, at same depth gradually increases. When is small, there no significant difference between spectra without water; when large, high-frequency part value. middle- low-frequency part, obviously smaller than water. The amplitude water-free moves long-period direction, but tends short-period direction. free model.