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本文以Biot动态方程(u-p公式)为控制方程,采用有限元方法和Generalized Newmark-β时间积分方法,在SWAN-DYNE的基础上发展了用于分析海床基础固结和动态响应分析的计算程序PORO-WSSI 2D。利用太沙基一维固结理论验证了POR-WSSI 2D中固结模块的有效性。利用该计算程序,深入研究了大型海床基础在大型复合式防波堤和静水压力作用下的固结过程以及最终的固结状态。计算结果表明计算程序PORO-WSSI 2D能够有效地分析评价海床基础在海洋结构物作用下的固结过程以及预测海床基础的剪切破坏行为。所确定的最终固结状态还可以为后续研究海床基础在波浪、地震等动力荷载作用下的动态液化和剪切破坏提供可靠的初始条件。
In this paper, the Biot dynamic equation (up equation) is used as the control equation. The finite element method and the Generalized Newmark-β time integral method are used to develop the calculation program for analyzing the foundation consolidation and dynamic response of the seabed based on SWAN-DYNE PORO-WSSI 2D. The validity of the consolidation module in POR-WSSI 2D is verified by the one-dimensional consolidation theory of terbutaline. Using this calculation program, the consolidation process and the final consolidation state of the large seafloor foundation under large composite breakwater and hydrostatic pressure are deeply studied. The calculation results show that the calculation program PORO-WSSI 2D can effectively analyze and evaluate the consolidation process of the seafloor foundation under the action of marine structures and predict the shear failure behavior of the seafloor foundation. The determined final consolidation state can also provide reliable initial conditions for subsequent studies on the dynamic liquefaction and shear failure of the seabed foundation under dynamic loads such as waves and earthquakes.