3D integrated numerical model for Fluid-Structures-Seabed Interaction (FSSI): Loosely deposited seabed foundation

TY - JOUR

T1 - 3D integrated numerical model for Fluid-Structures-Seabed Interaction (FSSI)

T2 - Loosely deposited seabed foundation

AU - Ye, Jianhong

AU - Jeng, D. S.

AU - Chan, A. H C

AU - Wang, R.

AU - Zhu, Q. C.

N1 - Dr Ye Jianhong appreciates the financial funding support from National Natural Science Foundation of China under Project no. 41472291. Prof. Wang and Prof. Zhu thank the financial support from Chinese 973 Project: Evolutionary Trends and Sustainable Utilization of Coral Reefs in the South China Sea (2013CB956104). Dr Ye and Prof. Jeng are grateful for the financial support from EPSRC#EP/G006482/1. Dr Ye also appreciates the funding support of Overseas Research Student Award from Scottish Government, UK.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - In the past several decades, a great number of offshore structures have been constructed on loosely deposited seabed foundation because sometimes there would be no a dense seabed floor could be chosen in planned sites, for example, the breakwaters and oil platforms in the Yellow River estunary area, China. Wave-induced residual liquefaction is easy to occur in loosely deposited seabed, which brings great risk to the stability of offshore structures. In this study, we focus our attention on the 3D interaction mechanism between ocean wave, a caisson breakwater and its loosely deposited seabed foundation. A three-dimensional integrated numerical model FSSI-CAS 3D is taken as the computational tool; and the soil constitutive model: Pastor-Zienkiewicz Mark III (PZIII) proposed by Pastor et al. [16] is adopted to describe the wave-induced dynamic behavior of loose seabed soil. The numerical results indicate that the developed integrated numerical model FSSI-CAS 3D is capable of capturing a series of nonlinear phenomena, such as tilting, subsiding of breakwater, as well as residual liquefaction in loose seabed foundation etc., in the interaction process between ocean wave, a caisson breakwater and its loose seabed foundation. The purpose of this study is to provide coastal engineers with comprehensive understanding of FSSI problme involving loosely deposited seabed soil; and propose a reliable computational method to engineers involved in the design of offshore structures on loose seabed foundation.

AB - In the past several decades, a great number of offshore structures have been constructed on loosely deposited seabed foundation because sometimes there would be no a dense seabed floor could be chosen in planned sites, for example, the breakwaters and oil platforms in the Yellow River estunary area, China. Wave-induced residual liquefaction is easy to occur in loosely deposited seabed, which brings great risk to the stability of offshore structures. In this study, we focus our attention on the 3D interaction mechanism between ocean wave, a caisson breakwater and its loosely deposited seabed foundation. A three-dimensional integrated numerical model FSSI-CAS 3D is taken as the computational tool; and the soil constitutive model: Pastor-Zienkiewicz Mark III (PZIII) proposed by Pastor et al. [16] is adopted to describe the wave-induced dynamic behavior of loose seabed soil. The numerical results indicate that the developed integrated numerical model FSSI-CAS 3D is capable of capturing a series of nonlinear phenomena, such as tilting, subsiding of breakwater, as well as residual liquefaction in loose seabed foundation etc., in the interaction process between ocean wave, a caisson breakwater and its loose seabed foundation. The purpose of this study is to provide coastal engineers with comprehensive understanding of FSSI problme involving loosely deposited seabed soil; and propose a reliable computational method to engineers involved in the design of offshore structures on loose seabed foundation.

KW - 3D residual liquefaction

KW - Caisson breakwater

KW - Fluid-Structures-Seabed Interaction (FSSI)

KW - FSSI-CAS 3D

KW - Loosely deposited seabed foundation

KW - PZIII

U2 - 10.1016/j.soildyn.2016.10.026

DO - 10.1016/j.soildyn.2016.10.026

M3 - Article

AN - SCOPUS:84995802356

SN - 0267-7261

VL - 92

SP - 239

EP - 252

JO - Soil Dynamics and Earthquake Engineering

JF - Soil Dynamics and Earthquake Engineering

ER -