Dynamic behaviour of weathered red mudstone in Sichuan (China) under triaxial cyclic loading

doi:10.1007/s11629-017-4756-6

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2018 > Vol15 No.8

	Dynamic behaviour of weathered red mudstone in Sichuan (China) under triaxial cyclic loading
	Zhang Chong-lei; Jiang Guan-lu; Su Li-jun; Liu Wei-ming
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018
卷号	15 期号:8 页码:1789-1806
关键词	Cyclic triaxial tests Cyclic stress ratio Red mudstone Critical dynamic stress Cumulative strain Railway subgrade
ISSN号	1672-6316
DOI	10.1007/s11629-017-4756-6
文献子类	Article
英文摘要	The construction of a high-speed railway (HSR) in Southwest China is being hindered by a severe shortage of high-quality subgrade materials. However, red mudstone is widely distributed in the Sichuan Basin of China. The ability to use weathered red mudstone (WRM) to fill subgrade beds by controlling its critical stress and cumulative strain would enable substantial savings in project investments and mitigate damage to the ecological environment. To better understand the dynamic behaviour of WRM, both monotonic and cyclic triaxial tests were performed. The evolution of the cumulative strain vs. increased loading cycles was measured. The influences of confining pressure and loading cycles on the dynamic modulus, damping ratio, critical cyclic stress ratio (CSR), and dynamic stress level (DSL) were investigated. The relationship between the CSR and loading cycles under different failure strain criteria (0.1%-1.0%) was analysed. The prediction model of cumulative strain was also evaluated. The results indicated that the shear strength of WRM sufficiently meets the static strength requirements of subgrade. The critical dynamic stress of WRM can thus satisfy the dynamic stress-bearing requirement of the HSR subgrade. The critical CSR decreases and displays a power function with increasing confining pressure. As the confining pressure increases, the DSL remains relatively stable, ranging between 0.153 and 0.163. Furthermore, the relationship between the dynamic strength and loading cycles required to cause failure was established. Finally, a newly developed model for determining cumulative strain was established. A prediction exercise showed that the model is in good agreement with the experimental data.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000442239600013
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35573]
专题	Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.8
推荐引用方式 GB/T 7714	Zhang Chong-lei,Jiang Guan-lu,Su Li-jun,et al. Dynamic behaviour of weathered red mudstone in Sichuan (China) under triaxial cyclic loading[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(8):1789-1806.
APA	Zhang Chong-lei,Jiang Guan-lu,Su Li-jun,&Liu Wei-ming.(2018).Dynamic behaviour of weathered red mudstone in Sichuan (China) under triaxial cyclic loading.JOURNAL OF MOUNTAIN SCIENCE,15(8),1789-1806.
MLA	Zhang Chong-lei,et al."Dynamic behaviour of weathered red mudstone in Sichuan (China) under triaxial cyclic loading".JOURNAL OF MOUNTAIN SCIENCE 15.8(2018):1789-1806.