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原始统一硬化模型是基于在等向压缩条件下土的比体积与压力的对数呈线性关系而建立的。由于v-lnp线性关系在理论上存在某些不合理,Hashiguchi等建议采用lnv-lnp线性关系以消除这些不合理性。基于此,推导出基于等向压缩的lnv-lnp线性关系的统一硬化模型,并通过对两个模型分别进行试验结果与预测结果的比较,结果表明:在一般条件下两个模型都能合理描述土的应力应变特性,差别不大。
The original uniform hardening model is based on a linear relationship between the specific volume of soil and the logarithm of pressure under isotropic compression. Due to the theoretical unreliability of the linear relationship of v-lnp, Hashiguchi et al. Proposed a lnv-lnp linear relationship to eliminate these irrationalities. Based on this, a unified hardening model of lnv-lnp linear relationship based on isotropic compression is deduced. By comparing the two models with the predicted results, the results show that under normal conditions, both models can reasonably describe Soil stress-strain characteristics, little difference.