闸门-地基非线性动力相互作用分析

采用大型有限元软件对地基、闸门进行整体建模,讨论了在动力相互作用的分析中,简单截断人工边界的合理取值范围以及土体非线性的塑性性质对分析结果的影响;比较了在深层搅拌桩加固的复合地基中,按桩、土分别独立建模与按常规的平均法进行分析的差异。分析结果表明,不同的分析模型,人工边界的合理取值范围是不一样的;土体的滤波作用及其塑性的非线性性质对分析结果有重大的影响;对深层搅拌桩加固的复合地基,应该按实际把桩、土分别独立建模进行分析。分析结果对工程实际有一定的指导意义。

Nonlinear dynamic analysis of interaction between water gate and foundation

The analysis model was built as a whole for foundation and water gate with large-scale FEM commercial software and the rational calculation range of the simply cut-off artifical boundary and the effect of plastic nonlinear feature of soil on the dynamic interaction analysis results were discussed.The general mean analysis model and the model built with pile and soil independently in deep mixing pile compound foundation were compared.The analysis shows that the rational calculation ranges are different in different analysis models.The filter function of soil and its nonlinear plastic feature have great effect on the analysis results.The deep mixing pile and the soil should be built respectively in the analysis model in deep mixing pile compound foundation.The analysis results have certain instructive significance to engineering practice.