Dynamic Response of the Sandy Seabed to Combined Wave and Current Loading

doi:10.16183/j.cnki.jsjtu.2012.10.004

Abstract

Abstract:

Based on two-phase u-p theory for saturated soil, a new constitutive model based on the super/ sub-loading surface and anisotropy was utilized to analyze the dynamic responds of a sandy seabed under the combined wave and current loadings. Firstly, a poro-elastoplastic model for a sandy seabed was established. The mechanics of oscillatory excess pore water pressure in seabed and residual excess pore pressure due to wave/ current were discussed and the liquefaction depth which changes correspondingly was obtained. A comparison between the elastic and elatoplastic sandy seabed's dynamic responds to wave/current loading was also presented.

Key words: two-phase mixture theory, wave/current, sandy seabed, wave parameter, liquefaction depth, elastoplastic model

CLC Number:

TU443

CUI Song, ZHENG Dong-sheng, YE Guan-lin, XIA Xiao-he, WANG Jian -hua. Dynamic Response of the Sandy Seabed to Combined Wave and Current Loading[J]. Journal of Shanghai Jiao Tong University, 2012, 46(10): 1553-1557.

Figures/Tables 8

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References 9

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参数	参数值
压缩指数λ	0.05
膨胀指数κ	0.006 4
临界状态应力比M	1.3
孔隙比e（p′＝98 kPa时正常固结）	0.87
泊松比ν	0.30
超固结状态变化参数m_R＊	0.01
结构衰退参数m_R	0.50
各向异性发展速度控制参数b_r	1.5
初始孔隙比e₀	0.646
初始平均主应力σ₀／kPa	221
初始结构	0.179
初始超固结比	426.0
初始各向异性	0.037 9