土体变形虽然是非线性的,但在微小增量时可看作是线性的,且服从增量线性的各向同性广义虎克定律。Duncan-Chang(D-C)模型提出于1970年,D-C模型属于非线性次弹性模型中的变模量模型。用E-!模型一般可以通过有限元法计算出各种黄土建筑物和地基的应力状态和变形,据与实测资料比较,准确性可达70%~80%,一般偏大。 Although soil deformation is non-linear, it can be regarded as linear in small increments and subject to isotropic generalized Hooke’s law of incremental linearity. The Duncan-Chang (D-C) model was proposed in 1970, and the D-C model belongs to a model of variable modulus in the nonlinear model. With the E-! Model, the stress state and deformation of various loess buildings and foundations can generally be calculated by the finite element method. Compared with the measured data, the accuracy can reach 70% -80%, which is generally larger.