中文摘要：

应用双曲线方程、修正曼辛准则（Masing rule）和过应力型粘塑性理论，建立了一种可以同时描述土工合成材料应力应变关系的非线性、循环荷载作用下的弹塑性和滞回性、蠕变和应力松弛的一维本构模型。这个本构模型的独特之处包括功能全面、随加载路径移动的蠕变界线、非线性流变特性、以及参数确定方法简单直观等，且它可以很方便的植入已有的有限元软件包中。该模型还可以蜕化为率无关的非线性循环受载模型，可以很简单的应用于非线性动力数值分析。本文应用几种土工格栅试验结果验证了所提出的本构模型。

英文摘要：

A ID constitutive model was formulated based on the hyperbola equation, the modified Masing rule, and the over-stress visco-plasticity theory. The specific features of the model included the relatively comprehensive capacity, nonlinear rheology and the simplicity in identifying model parameters. It was easy to incorporate the model into existing finite element codes. The model could also be degenerated into a time-independent one to simulate the nonlinear cyclic properties of geosynthetic reinforcements, so that it might be easily used for dynamic analysis. Experimental results on several geogrids were employed to evaluate the constitutive model.