Testing and modeling of the state-dependent behaviors of rockfill material |
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| Institution: | 1. College of Civil Engineering and Transportation, Hohai University, Nanjing 210098, China;2. School of Civil Engineering, Nanjing Institute of Technology, Nanjing 211167, China;3. School of Civil & Environmental Engineering, Nanyang Technological University, Nanyang Avenue, 639798 Singapore, Singapore;1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310027, PR China;2. Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310027, PR China;3. College of Civil Engineering and Architecture, Wenzhou 325035, PR China;4. Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou 325035, PR China;5. Department of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, PR China;1. University of Delaware, Dept. of Civil and Environmental Engineering, 301 DuPont Hall, Newark, DE 19716, USA;2. Turner-Fairbank Highway Research Center, Federal Highway Administration, McLean, VA 22101, USA;1. Civil Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia;2. Centre for Geomechanics and Railway Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia;3. ARC Centre of Excellence for Geotechnical Science and Engineering, Univ. of Wollongong, Wollongong, NSW 2522, Australia;4. Civil Engineering, City Univ. of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region;5. Department of Civil and Architectural Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong Special Administrative Region;6. Civil Engineering, Univ. of Newcastle, Newcastle, NSW 2308, Australia;7. ARC Centre of Excellence for Geotechnical Science and Engineering, Univ. of Newcastle, Newcastle, NSW 2308, Australia;1. Geotechnical Research Institute, College of Civil and Transportation Engineering, Hohai University, Nanjing, China;2. Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong;3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, China;1. Ocean College, Zhejiang University, Zhoushan, Zhejiang Province 316021, PR China;2. Glenn Department of Civil Engineering, Clemson University, Clemson, SC 29634, USA;3. Department of Civil Engineering, National Central University, Taoyuan, Taiwan |
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| Abstract: | Dense Tacheng rockfill material (TRM) exhibits strain softening and dilation during drained triaxial tests, and therefore, an adapted Rowe’s stress–dilatancy equation was proposed for TRM. This equation incorporates an internal state index related to the density and pressure, as well as the coefficient of particle breakage and rotation. The adapted Rowe’s stress–dilatancy equation indicates that the relationship between stress and dilatancy is not constant, but varies with density and pressure. This result is in agreement with TRM test data. A state-dependent model was established for TRM using generalized plasticity theory combined with the adapted Rowe’s stress–dilatancy equation. The model includes twelve constants calibrated using TRM test data from Group A, and this model was used to predict the strain softening and dilatancy behaviors of dense TRM. Furthermore, the model predictions were validated using test data from Group B. In summary, the model accurately represented the stress–strain and dilatancy behaviors of TRM over a wide range of densities and pressures. |
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| Keywords: | Rockfill material Peak failure Stress ratio Dilatancy State index Model |
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