中文摘要：

通过将一种各向异性参数α引用到统一硬化模型中，建立能够考虑土的原生各向异性的统一硬化模型。该模型采用将各向异性土体的应力变换为等效各向同性土体的应力方法，来实现各向异性的同性化，以考虑土的原生各向异性特性。各向异性参数可以由具有原生各向异性土的三轴试验获得。通过对日本丰浦砂试验数据的预测，表明了砂土原生各向异性统一硬化模型可以合理地描述具有原生各向异性砂土的变形特性、强度特性及其剪胀性。

英文摘要：

An inherent anisotropie unified hardening model for soils was presented using an anisotropic parameter a. The inherent anisotropy of soils can be processed as isotropy transforming its stresses into the equivalent isotropic soil. Parameter a can be obtained from the conventional triaxial compression tests and triaxial extension tests of the inherent anisotropic soils. The model is well demonstrated by comparison of the predicted stress-strain curve and test results of Toyoura sand under different stress conditions.