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Sui, T.; Zhang, C.; Zheng, J.; Guo, Y., and Xie, M., 2018. Numerical study of standing wave-induced residual response with the non-homogenous soil property. In: Shim, J.-S.; Chun, I., and Lim, H.S. (eds.), Proceedings from the International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal of Coastal Research, Special Issue No. 85, pp. 921–925. Coconut Creek (Florida), ISSN 0749-0208. Coastal seabed soil is usually non-homogeneous vertically. Seabed instability may take place under dynamic wave loading which may lead to the marine landslides. Most of the existing models have been limited to the soil oscillatory mechanism for a sandy seabed with relatively large permeability, which neglects the residual mechanism in a silt seabed with poor drainage condition. In this study, based on the Fully-dynamic (FD) seabed model, the numerical invesitgation for standing wave induced non-homogeneous seabed residual response is proposed. The present model is validated based on the flume tests in...

Zhang, J.; Song, S.; Zhai, Y.; Tong, L., and Guo, Y., 2019. Numerical study on the wave-induced seabed response around a trenched pipeline. Journal of Coastal Research, 35(4), 896–906. Coc...

Zhang, J., Zheng, J., Zhang, C., Jeng, D. and Guo, Y., 2013. Numerical study on the interaction between waves and twin pipelines in sandy seabed In offshore engineering practice, the construction of an identical cylinder close to the existing pipeline may largely affect the near flow field and hydrodynamic forces on the pipelines. The interaction between incident ocean wave and twin pipelines in sandy seabed plays an important role in the design of submarine pipelines. A mathematical model based on the Volume-Averaged Reynolds-Averaged Navier-Stokes (VARANS) equations, a two-equation k-e turbulence closure and an internal source term wave maker is adopted to describe this complex phenomenon. The sandy bed where the pipelines are partly buried is treated as a rigid porous material, and its impact on wave-pipeline interaction is considered in the VARANS model in terms of porosity and equivalent mean diameter of porous material. The impacts of burial depth and distance between the centers of twin pi...

Zhang, J.; Tong, L.; Zheng, J.; He, R., and Guo, Y., 2018. Effects of soil resistance damping on wave-induced pore pressure accumulation around a composite breakwater. It is important to consider the potential instability of the seabed from the accumulation of wave-induced pore pressure in the design of a composite breakwater because the pore pressure within the seabed can build up considerably under wave loading, which can eventually lead to a sharp decrease in its effective stress. Because of the importance in practical engineering, many theoretical models have been developed to evaluate the magnitude and distribution of residual pore pressure. However, most of these studies treat the soil skeleton as an invariant medium, which ignores the damping of the soil strength from the reduction in the effective stress. In this study, a two-dimensional poroelastoplastic model, in which the influence of the reduction of effective stress on soil strength was considered, is proposed for investigating the a...