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本文提出了用非线性增量分析双曲线应力-应变关系中的修正割线模量公式,并应用这一方法对湖北某一土坝进行了分析计算,同时也采用了邓肯-张公式中的切线模量进行了对比分析.本文所提出的修正剖线模量公式避免了在使用邓肯-张公式时确定初始模量的困难和试验工作.在应用邓肯-张公式确定初始模量时,当最小主应力很小时应用了先期固结压力的概念.对比计算结果表明,邓肯-张公式的计算受初始模量影响较大,而修正割线模量的计算则不受此影响,并较接近实测情况.
This paper proposes a nonlinear incremental analysis of the modified secant modulus formula in the hyperbolic stress-strain relationship, and applies this method to analyze and calculate a certain earth dam in Hubei, and also uses the Duncan-Chang formula. The tangent modulus is compared and analyzed. The modified section modulus formula proposed in this paper avoids the difficulty of determining the initial modulus when using the Duncan-Chang formula and the experimental work. When the initial modulus is determined using the Duncan-Chang formula, when The concept of pre-consolidation pressure is applied when the minimum principal stress is small. Comparing the calculation results shows that the calculation of the Duncan-Chang formula is greatly influenced by the initial modulus, and the calculation of the modified secant modulus is not affected by this and is closer. Actual measurement situation.