【摘要】 应力、温度和含水量是影响多年冻土蠕变行为的关键因素。在现有可考虑应力影响的时间硬化蠕变（THC）模型的基础上，提出考虑应力、温度和含水量影响的改进模型（TWTHC）。通过总结蠕变速率随温度和含水量变化的规律，提出指数型、逆指数型、高斯型和洛伦兹型温度因子，以及偏移幂函数型和典型幂函数型含水量因子。逆指数型温度因子拟合所有应力和含水量条件下稳定蠕变速率随温度变化曲线的残差平方和（SSE）平均值最小，为2.34×10^-13。典型幂函数型含水量因子拟合所有曲线的SSE平均值最小，为4.760 4×10^-13。选择逆指数型温度因子和典型幂函数型含水量因子与THC模型结合，构建最终的TWTHC模型。通过ABAQUS仿真平台对该模型进行二次开发，并将仿真结果与理论值进行对比。结果表明，TWTHC模型能够较好地拟合不同应力、温度和含水量条件下的室内单轴蠕变试验数据，且二次开发的仿真值与理论值吻合良好。该模型能够有效考虑温度和含水量的影响，为工程应用奠定了基础。更多还原

【Abstract】 Stress, temperature, and water content are key factors influencing the creep behavior of perennial frozen soil. This paper proposed an improved model（TWTHC） that considers the effects of stress, temperature, and water content, based on the existing time hardening creep（THC） model that accounts for stress effects. By summarizing the patterns of creep rate changes with temperature and water content, exponential, inverse exponential, Gaussian, and Lorentzian temperature factors, as well as offset power function and typical power function water content factors, were proposed. The inverse exponential temperature factor achieved the smallest average sum of squared errors（SSE） of 2.34×10^-13 when fitting stable creep rate-temperature change curves under all stress and water content conditions. The typical power function water content factor resulted in the smallest average SSE of 4.760 4×10^-13 when fitting all curves. By combining the inverse exponential temperature factor and the typical power function water content factor with the THC model, the final TWTHC model was constructed. The model underwent software application via the ABAQUS simulation platform, along with the comparison of the simulation results with theoretical values. The results demonstrate that the TWTHC model can effectively fit indoor uniaxial creep test data under various stress, temperature, and water content conditions, with the simulation values from software application aligning well with the theoretical values. This model effectively considers the impacts of temperature and water content, laying a foundation for engineering applications.更多还原