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统一硬化模型(UH模型)是一种适用于超固结土的弹塑性本构模型。该模型不仅能够合理地反映超固结土的剪缩、剪胀、应变软化及应力路径相关性等特性,并且具有参数较少、易于确定的优点。传统的模型预测方法需要较高的模型理论基础,处理过程相对繁琐复杂。基于以上原因,采用C#程序语言开发了包含修正剑桥模型、初始UH模型、UH模型、考虑时间效应的UH模型等多种模型的UH模型分析预测平台。该平台集成了试验数据的录入和输出、模型参数的自动获取、模型预测及预测结果可视化显示等功能模块,实现了模型预测的全过程自动化,极大地简化了模型预测过程,并且嵌入了采用UH模型的有限元模拟三轴试验试样加载破坏过程,实现了加载破坏过程中应力、应变、位移的分布变化及破坏面形成发展变化的云图显示。
The Uniform Hardening Model (UH model) is an elasto-plastic constitutive model for overconsolidated soil. The model not only can reasonably reflect the characteristics of shear deformation, dilatancy, strain softening and stress path correlation of overconsolidated soil, but also has the advantages of less parameters and easy to determine. The traditional model prediction method needs a higher basis of model theory, and the processing is relatively complicated and complicated. Based on the above reasons, this paper uses the C # programming language to develop a UH model analysis and prediction platform that includes a modified Cambridge model, an initial UH model, a UH model, and a UH model considering the time effect. The platform integrates the input and output of test data, the automatic acquisition of model parameters, the prediction of models and the visual display of prediction results. It realizes the whole process automation of model prediction, greatly simplifies the model prediction process, and embeds UH The finite element method of the model is used to simulate the loading failure process of the triaxial test specimen, and the distribution of stress, strain and displacement during loading failure and the cloud image display of the development and deformation of the failure surface are realized.