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摘要:
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本文在上海软土各向同性破坏准则的基础上,引入各向异性参数,对上海软土各向异性弹塑性模型的建立进行研究和探讨,并对模型中的各项参数进行确定。计算结果表明,在确定土体应力—应变关系时,不仅应该考虑土的弹塑性,还应该考虑到土的各向异性,这样才能符合土的实际情况。
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Based on the isotropic failure criterion and anisotropic parameters adopted,the establishment of an anisotropic elasto plasticity model for Shanghai soft soil is researched,and the methods for determining parameters in the model are presented in this paper.The calculated results show that the model considering both elasto plastic and anisotropic characteristics in determining soil stress strain relations agrees quite closely with the actual state.
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基金项目:
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国家自然科学基金
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作者简介:
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参考文献:
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1CasagrandeA,CariloN.Shearfailureofanisotropicsoils.Proc.BostonSoc.Civ.Enginers,1994;31.2周正明,沈珠江.考虑各向异性的土的本构关系.第三届全国岩土力学数值分析与解析方法会议论文集.广东珠海,1988.11.3陈列峰,龚晓南,曾国熙.考虑地基各向异性的沉降计算.土木工程学报,1991;(1).4袁聚云,杨熙章,赵锡宏,等.上海软土各向异性性状的试验研究.大坝观测与土工测试,1996;(1).5袁聚云,赵锡宏,董建国.上海地区粘性土弹塑性应力~应变模型的研究.上海地质,1995;(3).6LadePV,DuncanJM.Elasto-plasticstres-strainthe-oryforcohesionlessoils.Proc.ASCE.J.GED.1975;101(GT10).
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