粘性土的弹粘塑性本构方程及其应用

从常规试验成果出发，用弹粘塑性应力－应变－时间本构方程来描述粘性土的剪胀特性和时间效应。并采用Ｐｅｒｚｙｎａ的粘塑性方程，结合关联和不相关联流动法则，建立应力－应变－时间关系，对粘性土的有效应力路径特别是塑性区的剪胀特性和应力－应变关系的时间依存性进行了数值模拟计算，得出了与试验相近的结果。通过计算结果和试验结果的对比分析，探讨了该计算模型的合理性和可行性。

Elasto viscoplastic constitutive equation of cohesive soils and its application

In this paper, on the basis of conventional test results, an elasto viscoplastic constitutive equation is used to simulate the dilatancy behaviour and time effect for cohesive soils. The treatment of the dilatancy behaviour and time dependent stress strain relation according to the Perzyna′s viscoplastic equation and the non-associative flow rule is discussed and the computed results appear to be consistent with laboratory observations. The validity of proposed constitutive relations is confirmed by comparisons of the experimental observations with results of numerically simulated undrained triaxial tests.