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桶形基础承载力的三维弹塑性有限元分析

, PP. 1041-1047

Keywords: 软土,桶形基础,几何参数,弹塑性,承载力

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Abstract:

?在经典的drucker-prager弹塑性本构模型基础上,通过将线性屈服准则改为抛物线型屈服准则来模拟静水压力对土体的屈服与破坏,并根据试验确定的硬化曲线建立了改进的d-p模型,使该本构模型能很好地模拟大港滩海软土的应力应变关系.利用marc.msc程序作为平台,建立了滩海桶形基础承载力有限元分析模型,对桶高、桶径及不同径高比的桶形基础承载力进行分析.结果表明,实际应用时应采用径高比大于1的桶形基础.

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