Shaking Table Test of the Negative Skin Friction of a Single Pile Induced by Seismic Settlement of Model Soft Soil

The negative skin friction (NSF) of pile foundations is one the most important factors in triggering building subsidence. To study mechanism and development NSF over time, four methods have been used: theoretical calculations, field tests, model numerical modeling. address difficulty sampling prototype soft soils this uses a dynamic triaxial instrument to select similar material ratio that can effectively simulate properties soil as layer, input sine waves with different frequencies peak ground acceleration (PGA) for shaking table tests investigate effects frequency PGA on distribution location neutral point foundation. test results show mainly distributed upper part under horizontal wave loading, increases rapidly from 0 5 s, stabilizes after s. Its magnitude influenced by PGA, effect more significant. In addition, position shifts downwards increasing but shift not