【软粘土各向异性变形特性】.pdf
软粘土各向异性变形特性 提要 本文首先根据Fourier-Bessel积分变换和矩阵递推法 推导了多层各向异性地基在轴对称荷载下的位移和应力初参数解 法,该方法不论层数多少都不必求解任何联立方程,并可用于求 解各向异性加筋土地基,计算公式已编制了程序通过算例验 证了该方法的精确性.其次推导了一基于双曲线模型,并在此模型上作了许多改进 的变弹性模型,该模型考虑了应力路径,中主应力和剪胀性的影 响。其切线模量是平均有效应力,应力水平和增量应力比的函数.结合B1ot固结理论和本文的变弹性模型:编制了各向异性土体 的平面应变,轴对称和三维固结问题的有限元法程序。
SOFTCLAY ABSTRACT First displacements and stresses or multi-layered anlsotropiosoil layers under axisysmmetric surrace loading can bederived,by use or initialrunction method.Applying the Fourier-Bossel Integral Trans form in this method,the golution or single anisotropic goil layer is worked out,
bohaviour or Ncolay has been checked or soil tegtod K has a significant orreot on the normalized stress-strain curve,which can be rittad byahyperbolic function Tangent Poissons ratio is a funotion orK andincreaseswiththe cally independent or cell Dressure.