Study on dynamic behavior and permanent deformation characteristics of coarse-grained soil

被引：0

作者：

Mei H. ^{[1
]}

Leng W. ^{[1
,2
]}

Nie R. ^{[1
,2
]}

Li Y. ^{[1
]}

机构：

[1] School of Civil Engineering, Central South University, Changsha

[2] Ministry of Education Key Laboratory for Heavy-haul Railway Engineering Structures, Central South University, Changsha

来源：

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2019年 / 47卷 / 09期

关键词：

Accumulated plastic strain; Coarse-grained soil filling; Permanent strain rate; Repeated load triaxial tests; Shakedown theory; Stress state;

D O I：

10.13245/j.hust.190920

中图分类号：

学科分类号：

摘要：

Repeated load triaxial tests were performed on coarse-grained soil filling, and the development laws of axial permanent strain of coarse-grained soil under different confining pressures and axial dynamic stresses were analyzed.The permanent deformation behaviors of coarse-grained soil were divided based on shakedown theory and the variation trend of permanent strain rate with accumulated plastic strain, and a permanent deformation prediction model considering stress state and number of load cycles was established.The range of parameters for different dynamic behavior types was also given.The results indicate that variation trend of cumulative strain rate with accumulated plastic strain can be used as a basis for classifying the dynamic behaviors of coarse-grained soil.The stress state (confining pressure and dynamic stress amplitude) of coarse-grained soil samples has significant effects on the permanent strain rate.The accumulation characteristics of permanent deformation of coarse-grained soil with load cycles can be described by power function.The model parameters can reflect the influence of confining pressure and dynamic stress amplitude.The research results will help to deepen the understanding of the deformation response characteristics of coarse-grained soil filling. © 2019, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：113 / 119

页数：6

共 7 条

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