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在描述重塑土的统一硬化模型(UH模型)基础上,以动态地移动正常固结线(MNCL)代替静态的正常固结线(NCL)作为参考线来确定参考应力,将土的结构性衰减体现在MNCL的演化中,从而把UH模型扩展为可考虑土结构性的结构性土UH模型。结构性土UH模型可以合理地并连续光滑地描述结构性土的等向压缩规律、应变硬化、应变软化、剪切体积收缩、剪切体积膨胀、不排水剪切减压软化以及结构性和密度耦合影响等力学特性。相比于UH模型,结构性土UH模型新增3个参数,分别用于描述结构性的程度、衰减速度、以及塑性流动规律。通过3种天然土的试验结果与模型预测对比验证了结构性土UH模型的合理性。
On the basis of describing the uniform hardening model of remolded soil (UH model), the reference stress is determined by dynamically moving the normal consolidation line (MNCL) instead of the static normal consolidation line (NCL) as the reference line, Attenuation is reflected in the evolution of the MNCL, thus extending the UH model to a structural soil UH model that can account for soil structure. The structural soil UH model can reasonably and continuously and smoothly describe the isotropic compression laws of structural soils, such as strain hardening, strain softening, shear volume shrinkage, shear volume expansion, undrained shear decompression softening and structural and density Coupling effects and other mechanical properties. Compared with the UH model, three new parameters are added to the structural soil UH model to describe the degree of structure, the attenuation speed and the plastic flow rule respectively. The rationality of the structural soil UH model is verified by comparing the test results of three natural soils with the model predictions.