1201 - Tsunami-Seabed-Structure Interaction From Geotechnical And Hydrodynamic Perspectives: Role Of Overflow/Seepage Coupling

Monday, July 30

4:30 PM - 4:50 PM

Location: Grand Ballroom IX & X

Presenting Author(s)

SS

Shinji Sassa, PhD

Head of Soil Dynamics Group and Research Director
Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology

This paper presents some recent research advances in tsunami-seabed-structure interaction following the 2011 Tohoku Earthquake Tsunami, Japan. Role of overflow and seepage coupling is highlighted, based on the effect of tsunami-induced seepage on piping/boiling, erosion and bearing capacity decrease and failure of the rubble/seabed foundation. The use of the geotechnical centrifuge and a large-scale hydro flume for the modelling of tsunami-seabed-structure interaction is also discussed and compared leading to the stability assessment for the design of tsunami-resistant structures. Overall, the present findings elucidate the crucial role of overflow/seepage coupling in tsunami-seabed-structure interaction, warranting an enhanced disaster resilience.