尖点突变模型描述土应力应变特性的可行性

Description of Stress-strain Relationship for Soils with Cusp-catastrophe Model

根据尖点突变模型的基本方程和土的应力 -应变关系特点 ,通过坐标变换导出了在三轴条件下以轴应变、孔隙比和广义剪应力表示的土本构方程表达式。表达式中只有 3个参数 ,可以通过统计方法由三轴试验数据得到。与Duncan- Chang模型和砂土及粘土的实测数据进行比较后得出结论 :该模型是有效的。

Based on cusp-catastrophe equation and stress-strain relationship for soils, a constitution equation illustrated by axes strain、pore ratio and general shear stress was established for soils by coordinate transformation. There are only three parameters, which can be attained from triaxes experimental results by statistics.In comparison with Duncan-Chang model and experimental results,it shows that the proposed model is more effective.