针对DESAI的扰动状态（DSC）本构模型只考虑了塑性偏应变对扰动状态的影响，而没有考虑塑性体积应变的影响，对DESAI扰动状态本构模型的扰动函数进行改进，在原扰动函数的基础上引入一个塑性偏应变迹和塑性体积应变迹的耦合形式作为扰动函数的扰动变量。取温州原状结构性软土进行了三轴固结不排水（CU）压缩试验、三轴固结排水（CD）压缩试验和一维压缩试验，通过试验数据对改进了扰动函数的DSC本构模型进行了验证，结果表明改进前模型对原状结构性软土的不排水强度和排水强度预测均略偏高，改进后的模型对原状结构性软土应力应变关系的模拟为精确。 The disturded stste constitutive （DSC）model, proposed by Dwsai only condidered the affect of plastic deviatoric strain on disturbance stste, without considering the plastic volumetric strain. The disturbance function of the disturbed stste constitutive（DSC）model was improved by introducing a coupling-form disturbance variable of plastic deviatoric stain trace and plastic volumeric strain trace on the basis of original disturbance function. Triaxial consolidated undrained （CU）test, triaxial consolidated drained （CD）test and one dimensional compression test were performed on the wenzhou natural structured soft clay. The DSC constitutive model with the improved disturbance function was validated by the test datd. The validation results showed that the unimproved model predictsed a slightly higher strength of both undrained and drained test of the natural structured soft clay, and the prediction of the improved model was more accurate.
