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首页> 外文会议>Sino-Japan Geotechnical Symposium November; 20071104-07; Chongqing(CN) >UH MODEL AND UNDRAINED SHEAR STRENGTH FOR OVERCONSOLIDATED CLAYS WITH INITIALLY STRESS-INDUCED ANISOTROPY
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UH MODEL AND UNDRAINED SHEAR STRENGTH FOR OVERCONSOLIDATED CLAYS WITH INITIALLY STRESS-INDUCED ANISOTROPY

机译：初始应力诱导各向异性的超固结黏土的UH模型和不排水抗剪强度

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摘要

The UH (unified hardening) model is extended to the constitutive model for overconsolidated clays with initially stress-induced anisotropy. By introducing the potential failure stress ratio Mf, the characteristic stress ratio M, and state stress ratio ηk to the unified hardening parameter, the proposed model can model many characteristics of overconsolidated clays well, including initially stress-induced anisotropy, stress dilatancy,strain hardening and softening, and path dependency. Based on the SMP criterion and the corresponding transformed stress tensors,the model can be applied conveniently to three-dimensional stress states. According to the proposed model, the unified formulation of the undrained shear strengths is presented and used to the triaxial compression, the triaxial extension and plane strain conditions, respectively. The comparisons between the calculated results and test data confirm the validity of the model and the formula of undrained shear strength for overconsolidated clays with initially stress-induced anisotropy.
机译：将UH（统一硬化）模型扩展到具有初始应力引起的各向异性的超固结粘土的本构模型。通过将潜在破坏应力比Mf，特征应力比M和状态应力比ηk引入统一的硬化参数，该模型可以很好地模拟超固结粘土的许多特征，包括初始应力引起的各向异性，应力膨胀率，应变硬化。和软化以及路径依赖基于SMP准则和相应的转换应力张量，该模型可以方便地应用于三维应力状态。根据提出的模型，提出了不排水抗剪强度的统一公式，并分别用于三轴压缩，三轴延伸和平面应变条件。计算结果与试验数据之间的比较证实了模型的有效性以及超固结粘土的初始应力诱发各向异性的不排水抗剪强度公式。

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