【摘要】 在扰动状态概念基础上,建立了一个考虑土结构性影响的软黏土应力应变本构模型。模型尝试运用电阻率不规则因子来表征和测定土样的扰动变量,从而克服了传统扰动变量获取方法的不足,使之简便、快捷、经济、实用。另外,模型中,增加了土体体应变对土体扰动影响,且以试验和理论为依据建立扰动函数,从而使得模型更加符合土体实际工程力学特性。模型形式相对简单,参数易于确定。三轴排水剪切试验的验证结果表明,所构建的模型能较为合理地模拟结构性软黏土受荷扰动下的变形过程。更多还原

【Abstract】 Based on the disturbed concept theory,a new constitutive model is presented.In this model,electrical resistivity anomaly,which can be obtained conveniently,economically and practicably,is taken to define and measure the disturbed variable.The traditional methods measuring the disturbed variable may thus be optimized.In addition,the volumetric strain disturbance effect is taken into account in this model,and a disturbed function is established by use of the test results.The form of this model is relatively simple,and model parameters can be easily gained.Results from undrained triaxial shear tests show that this model can well describe the stress-strain characteristics of soft clay.更多还原