Experimental study on failure properties of frozen clay under dynamic loading [动荷载作用下冻结黏土破坏特性试验研究]

作者：Li X.; Wang H.; Zou S.; Jiang C.; Niu Y.^*

来源：Journal of Central South University(Science and Technology), 2019, 50(3): 641-648.

DOI：10.11817/j.issn.1672-7207.2019.03.018

• Failure strain
• Failure strain energy
• Failure strength
• Frozen clay

The uniaxial compression tests and the vibrating load tests were carried out, and the failure strength, initial yield strength, failure strain, failure time, failure strain energy of frozen clay were studied and compared under static-dynamic loading. The results show that the failure strength and initial yield strength of frozen clay increase significantly with the decrease of temperature, and the influence of vibrational frequency is relatively small. The failure strain and time of frozen clay show a tendency to increase firstly and then decrease with the decrease of temperature, and the decrease of temperature enhances the fragility of frozen clay. The failure strain energy of the frozen clay is an indicator to measure the ability of frozen clay to resist damage, which increases with the decrease of the temperature and the influence of the vibrational frequency is not obvious. In the situation of vibrating load, the failure strength and the initial yield strength increase, but the failure strain, the failure time and the failure strain energy all decrease. The vibrating load enhances the fragility of frozen clay and is good for destroying the frozen clay.

• 单位
  冻土工程国家重点实验室; 中国科学院大学