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首页> 外文期刊>Journal of Earthquake Engineering >A MICRO-MECHANICAL STUDY OF THE SEISMIC RESPONSE OF SATURATED CEMENTED DEPOSITS
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A MICRO-MECHANICAL STUDY OF THE SEISMIC RESPONSE OF SATURATED CEMENTED DEPOSITS

机译：饱和固井沉积物地震反应的微力学研究

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A coupled continuum-discrete hydromechanical model was employed to analyse the effects of cementation on the dynamic response of liquefiable deposits of granular soils. The discrete element method was used to idealise the solid phase and parallel bonds were utilised to model the inter-particle cementations. The pore fluid flow was addressed using averaged Navier-Stokes equations. The conducted simulations revealed a number of salient response patterns and mechanisms. Cemented granular soils were found to be generally highly resistant to liquefaction. However, full cementation of a shallow site may lead to a significant amplification of ground accelerations. A base isolation mechanism develops when a site is partially cemented and mitigates ground shaking hazard. The employed modeling approach provides an effective tool to assess the intricate micro-mechanical response mechanisms of saturated cemented soils.
机译：耦合连续离散流体力学模型被用来分析胶结作用对粒状土壤可液化沉积物动力响应的影响。使用离散元素方法使固相理想化，并使用平行键对粒子间胶结进行建模。使用平均Navier-Stokes方程求解孔隙流体流。进行的模拟揭示了许多显着的响应模式和机制。发现胶结的粒状土壤通常高度抗液化。但是，浅层场地的完全胶结可能会导致地面加速度显着放大。当部分胶结现场时，会形成基础隔离机制，从而减轻地面震动的危险。所采用的建模方法为评估饱和水泥土的复杂微机械响应机制提供了有效的工具。

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