一种改进的粘土亚塑性本构模型

A modified hypoplastic constitutive model for clay

简要地介绍了Herle和Kolymbas针对黏土建立的亚塑性本构模型的方法。结合黏土的特性以及对响应包络线的分析,详细地列出了HK模型几个尚未解决的问题,并对该模型3个参数分别进行了改进,建立了改进后的HK亚塑性公式以及参数的确定方法。改进后的模型继承了HK模型参数少、易确定以及公式简洁等特点,使HK模型不仅具有严密的数学和力学基础,而且具有较好的实际意义。

The established method of Herle and Kolymbas＇s （HK＇s） clay hypoplastic constitutive model is described. Several shortcomings of HK model are listed in detail by analyzing clay behavior and response envelope line; then three parameters in HK equation are modified to develop a modified HK hypoplastic formulation and determine parameters. The modified model has advantage of a few parameters which are easy to determine and a simple formulation. Meanwhile, modified HK model not only are based on rigorous mathematics and mechanics, but can be applied to practice.