Abstract Impact blasting loading is an unavoidable problem in cold area construction. In this study, the dynamic characteristics of frozen soil with a water content of 20% and different freezing temperatures are studied under the impact of a spilt Hopkinson pressure bar. Two aspects of the dynamic mechanical response are analyzed to describe the experimental results: temperature rises and the failure mechanism. A rate damage equation is derived considering the improved Ottosen model and thermal activation theory. The experimental results indicate that the improved nonlinear model can be applied to understand the impact mechanics of frozen soil and predict the evolution law of typical mechanical indexes.

中文翻译：

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冲击载荷作用下冻土Ottosen本构模型研究

摘要 冲击爆破荷载是寒冷地区施工中不可避免的问题。本研究以霍普金森压杆溢出作用下含水量为20%、不同冻结温度的冻土的动力特性为研究对象。分析动态机械响应的两个方面来描述实验结果：温升和失效机制。考虑改进的Ottosen模型和热活化理论，推导出速率损伤方程。实验结果表明，改进后的非线性模型可用于理解冻土冲击力学和预测典型力学指标的演化规律。