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首页> 外文期刊>Journal of earthquake and tsunami >STABILITY OF WATERFRONT RETAINING WALL SUBJECTED TO PSEUDO-DYNAMIC EARTHQUAKE FORCES AND TSUNAMI
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STABILITY OF WATERFRONT RETAINING WALL SUBJECTED TO PSEUDO-DYNAMIC EARTHQUAKE FORCES AND TSUNAMI

机译：拟动力地震力和海啸影响下的水边挡土墙的稳定性

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摘要

The paper pertains to a study in which the waterfront retaining wall has been analyzed for its stability when it is exposed to the forces jointly coming from an earthquake and tsunami. Closed form solutions following the simple limit equilibrium principles have been proposed. For the calculation of the seismic passive earth pressure and the wall inertia force, pseudo-dynamic approach has been considered, while the hydrodynamic and the tsunami wave pressures have been calculated using different approximating solutions available in literature. The results presented in the sliding and overturning modes of failure of the wall show that the stability of the wall gets seriously challenged when it gets jointly exposed to the effects of the tsunami and earthquake. About 92% decrease is observed in the value of the factor of safety in sliding mode of failure of the wall as the ratio of tsunami wave height to the upstream still water height increases from 0 to 1.5. Also, the critical mode of failure of the wall has been found to be that of the overturning. Effect of different parameters involved in the analysis has also been studied and it has been observed that quite a few of them like k(h), k(v), phi, delta, r(u) have a significant effect on the stability of the wall. Comparison with a previously existing methodology using pseudo-static approach suggests that the present pseudo-dynamic approach is more realistic and comparatively less conservative and hence can be used as a handy simple economic method for the design of the waterfront retaining walls exposed to the combined effects of earthquake and tsunami.
机译：本文涉及一项研究，其中分析了海滨挡土墙在受到地震和海啸共同作用的力时的稳定性。已经提出了遵循简单极限平衡原理的闭式解。为了计算地震被动土压力和墙惯性力，已考虑使用拟动力方法，而使用不同的近似解来计算水动力和海啸波压力。墙体的滑动和倾覆破坏模式给出的结果表明，当墙体共同受到海啸和地震的影响时，其稳定性将受到严重挑战。随着海啸波高度与上游静水高度的比值从0增加到1.5，观察到在墙体滑动破坏模式下安全系数的值降低了约92％。而且，已经发现壁的破坏的关键模式是倾覆的模式。还研究了分析中涉及的不同参数的影响，并且已经观察到，其中许多参数（例如k（h），k（v），phi，delta，r（u））对稳定性的影响很大。墙。与使用伪静态方法的现有方法的比较表明，本伪动态方法更现实，相对而言较为保守，因此可以用作方便简单的经济方法来设计暴露于综合效应的滨水挡土墙地震和海啸。

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