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A computational framework for fluid–structure interaction with applications on stability evaluation of breakwater under combined tsunami–earthquake activity
Computer-Aided Civil and Infrastructure Engineering ( IF 9.6 ) Pub Date : 2022-06-25 , DOI: 10.1111/mice.12880
Shuai Huang 1 , Chuanzheng Liu 1
Affiliation  

In this article, an improved impervious solid boundary condition of the coupled method called smooth particle hydrodynamics and discrete element method (SPH-DEM) is proposed, which prevents the fluid particles from penetrating solid boundary under earthquake action. And an improved transmitting boundary condition of SPH-DEM is designed in order to conquer the reflection of seismic waves on the boundary. Meanwhile, the effective stress method is proposed to be applied to the SPH-DEM for simulating seabed liquefaction. Based on these, a new computational framework for the SPH-DEM is put forward. Dynamic triaxial test of seabed soil samples indicate that our proposed computational framework can well reproduce the seismic liquefaction process of the seabed soil. Moreover, our proposed computational framework is used to numerically reproduce the failure mechanisms of a breakwater built in liquefied seabed under combined tsunami–earthquake activity and meantime the centrifuge test is carried out. And the experimental results demonstrate the effectiveness of our proposed computational framework, in which numerical results of it are consistent with results of the centrifuge test.

中文翻译:

流固耦合计算框架及其在海啸地震联合活动下防波堤稳定性评估中的应用

本文提出了一种改进的光滑粒子流体动力学与离散元法(SPH-DEM)耦合方法的不透水固体边界条件,以防止流体粒子在地震作用下穿透固体边界。并设计了一种改进的SPH-DEM传输边界条件,以克服地震波在边界上的反射。同时,提出将有效应力法应用于SPH-DEM模拟海底液化。在此基础上,提出了一种新的SPH-DEM计算框架。海底土壤样品的动态三轴试验表明,我们提出的计算框架可以很好地再现海底土壤的地震液化过程。而且,我们提出的计算框架用于数值再现在海啸-地震联合活动下建造在液化海底的防波堤的失效机制,同时进行了离心机试验。实验结果证明了我们提出的计算框架的有效性,其中它的数值结果与离心机测试的结果一致。
更新日期:2022-06-25
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