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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >A simplified 3 DOF model of A FEM model for seismic analysis of a silo containing elastic material accounting for soil-structure interaction
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A simplified 3 DOF model of A FEM model for seismic analysis of a silo containing elastic material accounting for soil-structure interaction

机译：FEM模型的简化三自由度模型，用于对包含弹性材料的筒仓进行地震分析，并考虑了土-结构相互作用

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The purpose of this study is the evaluation of dynamic behavior induced by seismic activity on a silo system, containing bulk material, with a soil foundation. The interaction effects between the silo and bulk material, as well as the effects produced between the foundation of the silo and the soil, were taken into account. Proposed simplified approximation, as well as the finite model, were used for analysis. The results, from the presented approximation, were compared with a more rigorous obtainment method. Initially, the produced simplified approximation, with elastic material assumption for the grain, could determine the pressures on the dynamic material along with displacements along the height of the silo wall and base shear force, etc., with remarkable precision. Some comparisons, via a change of soil and/or foundation conditions, were also made regarding the seismic pressure of the dynamic material pressure, displacement and base shear forces for both squat and slender silos. Comparing the analytical predictions to results from the numerical simulations produced good results. It can be concluded that the model can be used effectively to perform a broad suite of parametric studies, not only at the design stage but also as a reliable tool for predicting system behavior under the limit state of the system. The results and comprehensive analysis show that displacement effects and base shear forces generally decreased when soil was softer; however, soil structure interaction (SSI) did not have any considerable effects on squat silos and therefore need not be taken into practice. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本研究的目的是评估地震活动在筒仓系统（包含散装物料）和土壤基础上引起的动态行为。考虑了筒仓与散装物料之间的相互作用以及筒仓的基础与土壤之间产生的影响。拟议的简化近似以及有限模型被用于分析。从提出的近似结果中，将结果与更严格的获取方法进行比较。最初，在假设具有弹性材料的情况下，采用简化的近似方法可以确定动态材料上的压力以及沿着筒仓壁高度的位移和基础剪力等，并具有极高的精度。通过改变土壤和/或地基条件，还对深井筒和细长筒仓的动态材料压力的地震压力，位移和基础剪力进行了一些比较。将分析预测结果与数值模拟结果进行比较，得出了很好的结果。可以得出结论，该模型不仅可以在设计阶段有效地用于执行一系列参数研究，还可以作为可靠的工具来预测系统在极限状态下的行为。结果和综合分析表明，土壤较软时，位移效应和基础剪力普遍减小；反之，则减小。但是，土壤结构相互作用（SSI）对深井筒仓没有任何重大影响，因此无需进行实践。 （C）2015 Elsevier Ltd.保留所有权利。

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