Nonlinear regression model for peak-failure strength of rockfill materials in general stress space

Nonlinear regression model for peak-failure strength of rockfill materials in general stress space

A nonlinear regression model for peak-failure strength prediction of rockfill materials is proposed. It is based on the relationship between the peak-failure stress ratio and the normalized confining pressure as well as the relationship between the normalized peak-failure stress ratio and the expone...

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Main Authors: Yang Xiao, Minqiang Meng, Hui Chen, Xiang He, Jinyu Ran, Weicheng Shi
Format: Article
Language:English
Published: Elsevier 2018-11-01
Series:Geoscience Frontiers
Online Access:http://www.sciencedirect.com/science/article/pii/S1674987117301238
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spelling doaj-55af332aac884b06b9b37fc6e52fc2822020-11-25T02:31:26ZengElsevierGeoscience Frontiers1674-98712018-11-019616991709Nonlinear regression model for peak-failure strength of rockfill materials in general stress spaceYang Xiao0Minqiang Meng1Hui Chen2Xiang He3Jinyu Ran4Weicheng Shi5State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China; Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China; School of Civil Engineering, Chongqing University, Chongqing 400045, China; Corresponding author. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China.School of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering, Chongqing University, Chongqing 400045, ChinaSchool of Civil Engineering and Architecture, Changzhou Institute of Technology, Changzhou 213002, ChinaA nonlinear regression model for peak-failure strength prediction of rockfill materials is proposed. It is based on the relationship between the peak-failure stress ratio and the normalized confining pressure as well as the relationship between the normalized peak-failure stress ratio and the exponent function of the intermediate principal stress ratio. This model can well predict the variations of the peak-failure stress ratio with the initial confining pressure and the intermediate principal stress ratio for different rockfill materials under different general stress paths. Comparisons of the measured and predicted results show that the peak-failure strength under the constant-p′ and constant-b path is larger than that under the constant-σ3′ and constant-b path. The predictive capacity of the proposed model for the peak-failure stress ratio is better than that for the peak-failure friction angle. Keywords: Stress path, Rockfill material, Strength, Friction angle, Stress ratiohttp://www.sciencedirect.com/science/article/pii/S1674987117301238
collection DOAJ
language English
format Article
sources DOAJ
author Yang Xiao
Minqiang Meng
Hui Chen
Xiang He
Jinyu Ran
Weicheng Shi
spellingShingle Yang Xiao
Minqiang Meng
Hui Chen
Xiang He
Jinyu Ran
Weicheng Shi
Nonlinear regression model for peak-failure strength of rockfill materials in general stress space
Geoscience Frontiers
author_facet Yang Xiao
Minqiang Meng
Hui Chen
Xiang He
Jinyu Ran
Weicheng Shi
author_sort Yang Xiao
title Nonlinear regression model for peak-failure strength of rockfill materials in general stress space
title_short Nonlinear regression model for peak-failure strength of rockfill materials in general stress space
title_full Nonlinear regression model for peak-failure strength of rockfill materials in general stress space
title_fullStr Nonlinear regression model for peak-failure strength of rockfill materials in general stress space
title_full_unstemmed Nonlinear regression model for peak-failure strength of rockfill materials in general stress space
title_sort nonlinear regression model for peak-failure strength of rockfill materials in general stress space
publisher Elsevier
series Geoscience Frontiers
issn 1674-9871
publishDate 2018-11-01
description A nonlinear regression model for peak-failure strength prediction of rockfill materials is proposed. It is based on the relationship between the peak-failure stress ratio and the normalized confining pressure as well as the relationship between the normalized peak-failure stress ratio and the exponent function of the intermediate principal stress ratio. This model can well predict the variations of the peak-failure stress ratio with the initial confining pressure and the intermediate principal stress ratio for different rockfill materials under different general stress paths. Comparisons of the measured and predicted results show that the peak-failure strength under the constant-p′ and constant-b path is larger than that under the constant-σ3′ and constant-b path. The predictive capacity of the proposed model for the peak-failure stress ratio is better than that for the peak-failure friction angle. Keywords: Stress path, Rockfill material, Strength, Friction angle, Stress ratio
url http://www.sciencedirect.com/science/article/pii/S1674987117301238
work_keys_str_mv AT yangxiao nonlinearregressionmodelforpeakfailurestrengthofrockfillmaterialsingeneralstressspace
AT minqiangmeng nonlinearregressionmodelforpeakfailurestrengthofrockfillmaterialsingeneralstressspace
AT huichen nonlinearregressionmodelforpeakfailurestrengthofrockfillmaterialsingeneralstressspace
AT xianghe nonlinearregressionmodelforpeakfailurestrengthofrockfillmaterialsingeneralstressspace
AT jinyuran nonlinearregressionmodelforpeakfailurestrengthofrockfillmaterialsingeneralstressspace
AT weichengshi nonlinearregressionmodelforpeakfailurestrengthofrockfillmaterialsingeneralstressspace
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