Combined wave-current induced instantaneous liquefaction of a sandy seabed

• Published in: Volume 1: Offshore Technology; Offshore Geotechnics
• Main Authors: Yang LJ(杨鲤境), Li CF(李畅飞), Wang JQ, Gao FP(高福平)
• Format: Other/Unknown Material
• Language: English
• Published: 2019
• Subjects: Arctic
• Online Access: http://dspace.imech.ac.cn/handle/311007/85116; https://doi.org/10.1115/OMAE2019-96655

Accurate prediction for the liquefaction depth of a porous seabed is crucial to the design of shallow foundations; nevertheless most previous studies are predominantly limited to wave-only conditions. In this study, the combined wave-current induced instantaneous liquefaction of a sandy seabed is investigated analytically. The explicit expression of liquefaction depth under combined wave-current loading condition is derived, which can converge to that under the linear wave condition when the current velocity approaches zero. Parametric study indicates that the effects of imposing a current onto progressive waves on the distribution of excess pore pressures and the corresponding liquefaction depth are unneglectable, especially for the opposite current conditions. Copyright © 2019 ASME.