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首页> 外文期刊>Bulletin of earthquake engineering >Numerical modelling of the effect of horizontal drains in centrifuge tests on soil-structure interaction in liquefiable soils
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Numerical modelling of the effect of horizontal drains in centrifuge tests on soil-structure interaction in liquefiable soils

机译：水平排水效果的数值建模在离心机中的液化土壤 - 结构相互作用中的效果

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摘要

The research presented herein was carried out in the framework of the H2020 LIQUEFACT project (http://www.LIQUEFACT.eu/). This paper presents the results of a set of numerical analyses performed to study the soil-structure interaction in presence of a liquefiable soil. In the first part of the paper, the attention was focused on the ability of some advanced soil constitutive models to simulate the centrifuge tests carried out within the project. Two finite element codes, Plaxis 2D and OpenSees, were used for the computations. The results were analysed in terms of accelerations, displacements and pore pressures build up. In the second part of the paper the effects of the introduction of horizontal drains, as mitigation techniques against liquefaction, were shown and discussed in terms of their ability in reducing pore pressure build-up and building settlement. All the numerical predictions confirmed the experimental evidence that horizontal drains are able to reduce the excess pore pressure during shaking and the structural settlement. The amount of reduction depends on the water boundary condition at surface: a free seepage surface generally allowed a larger mitigation than where the liquefiable layer was topped by clay.
机译：本文介绍的研究是在H2020液化项目的框架内进行的(http://www.LIQUEFACT.eu/)本文介绍了一系列数值分析的结果，以研究存在可液化土壤的土壤-结构相互作用。在论文的第一部分中，重点关注了一些先进的土壤本构模型模拟项目内进行的离心试验的能力。两个有限元程序Plaxis 2D和OpenSees用于计算。根据加速度、位移和孔隙压力累积对结果进行了分析。在论文的第二部分中，从降低孔隙压力累积和建筑物沉降的能力方面，展示并讨论了引入水平排水沟作为抗液化缓解技术的效果。所有的数值预测都证实了实验证据，即水平排水沟能够降低震动期间的超孔隙压力和结构沉降。减少量取决于表面的水边界条件：自由渗流表面通常允许比顶部为粘土的可液化层更大的缓解。

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