【作者】 姚仰平； 侯伟； 罗汀； 王乃东； 孔玉侠；

【Author】 YAO Yang-ping,HOU Wei,LUO Ting,WANG Nai-dong,KONG Yu-xia (Department of Civil Engineering,Beihang University,Beijing 100191,China)

【机构】 北京航空航天大学交通科学与工程学院；

【摘要】 统一硬化模型是在剑桥模型基础上建立起来的以变化应力方法和统一硬化参数为基本要素的弹塑性模型体系,采用基于SMP准则、Lade准则或广义非线性强度理论的变化应力方法实现了模型与强度准则的有机结合;应用统一硬化参数来描述土的剪缩、剪胀、硬化和软化、超固结性、各向异性、结构性、蠕变压缩、渐近状态等诸多特性。模型的参数较少、物理意义明确且可通过常规试验确定。它不仅对剑桥模型的进行了发展,而且也便于与现有的工程软件接轨,在工程中具有广阔的应用前景。更多还原

【Abstract】 Based on the Cam-clay model,unified hardening model is an elasto-plastic model systerm,which includes two basic elements,namely,transformed stress method and unified hardening parameter.The model is combined with strength criteria by adopting the transformed stress methods on the basis of the SMP criterion,the Lade’s criterion and the generalized non-linear strength theory.The model,to which the unified hardening parameter is introduced,is used to describe a lot of behaviors, including strain hardening and softening,stress dilatancy,over-consolidation,inherent anisotropy,structure,creep compression, asymptotic state and so on.Fewer parameters required in the model are confirmed by the conventional triaxial test.The model not only develops the Cam-clay model but also is easily exploited in the engineering software,so it can be widely used in engineering.更多还原