TY - JOUR
T1 - Shakedown analysis of cyclic plastic deformation characteristics of unbound granular materials under moving wheel loads
AU - Xiao, Yuanjie
AU - Zheng, Keyang
AU - Chen, Liuxin
AU - Mao, Jianfeng
N1 - Funding Information:
The authors acknowledge the financial support from the National Key R&D Program of China under Grant No. 2017YFB1201204, the National Natural Science Foundation of China under Grant No. 51508577, the Graduate Student Autonomous Exploration Project of Central South University (Grant No. 2017ZZTS525), and the Open-End Fund for the Valuable and Precision Instruments of Central South University (Grant No. 2017-32). Special thanks are due to Prof. Erol Tutumluer and his research group at the University of Illinois at Urbana-Champaign for their help. The contents of this paper reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein and do not necessarily reflect any official views or policies. This paper does not constitute a standard, specification, or regulation.
Funding Information:
The authors acknowledge the financial support from the National Key R&D Program of China under Grant No. 2017YFB1201204, the National Natural Science Foundation of China under Grant No. 51508577 , the Graduate Student Autonomous Exploration Project of Central South University (Grant No. 2017ZZTS525), and the Open-End Fund for the Valuable and Precision Instruments of Central South University (Grant No. 2017-32 ). Special thanks are due to Prof. Erol Tutumluer and his research group at the University of Illinois at Urbana-Champaign for their help. The contents of this paper reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein and do not necessarily reflect any official views or policies. This paper does not constitute a standard, specification, or regulation.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/4/10
Y1 - 2018/4/10
N2 - Cyclic plastic strain behavior of unbound granular materials (UGMs) exhibits significant stress path dependency. Using a customized triaxial apparatus capable of applying stress path loading, a series of laboratory repeated load triaxial (RLT) tests were conducted on two typical UGMs by varying simultaneously the axial stress and the radial stress. Effects of realistic in-situ stress paths due to a passing wheel on cyclic plastic strain behavior of unbound granular base and subbase materials were investigated and quantified. The analyses of experimental results revealed that the accumulated plastic strain responses of both UGMs subjected to different stress path loadings can be described by the shakedown approach. The amount of accumulated permanent strain, permanent strain rate, and resilient strain were used to classify the plastic deformation accumulation patterns of tested materials under moving wheel loads. Finally, the significance of the research findings on pavement analysis and design practices was highlighted to evaluate permanent deformation resistance of UGMs and their suitability for use in rut resistant and stable pavement foundation layers.
AB - Cyclic plastic strain behavior of unbound granular materials (UGMs) exhibits significant stress path dependency. Using a customized triaxial apparatus capable of applying stress path loading, a series of laboratory repeated load triaxial (RLT) tests were conducted on two typical UGMs by varying simultaneously the axial stress and the radial stress. Effects of realistic in-situ stress paths due to a passing wheel on cyclic plastic strain behavior of unbound granular base and subbase materials were investigated and quantified. The analyses of experimental results revealed that the accumulated plastic strain responses of both UGMs subjected to different stress path loadings can be described by the shakedown approach. The amount of accumulated permanent strain, permanent strain rate, and resilient strain were used to classify the plastic deformation accumulation patterns of tested materials under moving wheel loads. Finally, the significance of the research findings on pavement analysis and design practices was highlighted to evaluate permanent deformation resistance of UGMs and their suitability for use in rut resistant and stable pavement foundation layers.
KW - Permanent deformation
KW - Repeated load triaxial test
KW - Stress path loading
KW - Unbound granular materials
UR - http://www.scopus.com/inward/record.url?scp=85042307309&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2018.02.064
DO - 10.1016/j.conbuildmat.2018.02.064
M3 - Article
AN - SCOPUS:85042307309
SN - 0950-0618
VL - 167
SP - 457
EP - 472
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -