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Influence of principal stress rotation of unequal tensile and compressive stress amplitudes on characteristics of soft clay
Alternative TitleInfluence of principal stress rotation of unequal tensile and compressive stress amplitudes on characteristics of soft clay
SHEN Yang; WANG Xin; LIU Han-long; DU Wen-han; WANG Bao-guang; XU Hai-dong
Corresponding AuthorSHEN Yang
2017-02
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume14Issue:2Pages:369-381
Subtype期刊论文
AbstractSoil behavior can reflect the characteristics of principal stress rotation under dynamic wave and traffic loads. Unequal amplitudes of tensile and compressive stresses applied to soils have complex effects on foundation soils in comparison with the pure principal stress rotation path. A series of undrained cyclic hollow torsional shear tests were performed on typical remolded soft clay from the Hexi area of Nanjing, China. The main control parameters werethe tensile and compressive stress amplitude ratio(α) and the cyclic dynamic stress ratio (η). It was found that the critical η tended to remain constant at 0.13, when the value of the compressive stress amplitude was higher than the tensile stress amplitude. However, the influence of the tensile stress was limited by the dynamic stress level whenα= 1. For obvious structural change in the soil, the corresponding numbers of cyclic vibration cycles were found to be independent ofαat low stress levels and were only related to η. Finally, a new method for evaluating the failure of remolded soft clay was presented. It considers the influence of the tensile and compressive stresses which caused by complex stress paths of the principal stress rotation. This criterion can distinguish stable, critical, and destructive states based on the pore-water-pressure-strain coupling curve while also providing a range of failure strain and vibration cycles. These resultsprovide thetheoretical support for systematic studies of principal stress rotation using constitutive models.
Other AbstractSoil behavior can reflect the characteristics of principal stress rotation under dynamic wave and traffic loads. Unequal amplitudes of tensile and compressive stresses applied to soils have complex effects on foundation soils in comparison with the pure principal stress rotation path. A series of undrained cyclic hollow torsional shear tests were performed on typical remolded soft clay from the Hexi area of Nanjing, China. The main control parameters werethe tensile and compressive stress amplitude ratio(α) and the cyclic dynamic stress ratio (η). It was found that the critical η tended to remain constant at 0.13, when the value of the compressive stress amplitude was higher than the tensile stress amplitude. However, the influence of the tensile stress was limited by the dynamic stress level whenα= 1. For obvious structural change in the soil, the corresponding numbers of cyclic vibration cycles were found to be independent ofαat low stress levels and were only related to η. Finally, a new method for evaluating the failure of remolded soft clay was presented. It considers the influence of the tensile and compressive stresses which caused by complex stress paths of the principal stress rotation. This criterion can distinguish stable, critical, and destructive states based on the pore-water-pressure-strain coupling curve while also providing a range of failure strain and vibration cycles. These resultsprovide thetheoretical support for systematic studies of principal stress rotation using constitutive models.
KeywordComplex Stress Path Principal Stress Rotation Train Loads Amplitude Ratio Cyclic Dynamic Stress Ratio Failure Criterion
DOI10.1007/s11629-016-4000-9
Indexed BySCI
Language英语
CSCD IDCSCD:5922934
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18425
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.2
Recommended Citation
GB/T 7714
SHEN Yang,WANG Xin,LIU Han-long,et al. Influence of principal stress rotation of unequal tensile and compressive stress amplitudes on characteristics of soft clay[J]. Journal of Mountain Science,2017,14(2):369-381.
APA SHEN Yang,WANG Xin,LIU Han-long,DU Wen-han,WANG Bao-guang,&XU Hai-dong.(2017).Influence of principal stress rotation of unequal tensile and compressive stress amplitudes on characteristics of soft clay.Journal of Mountain Science,14(2),369-381.
MLA SHEN Yang,et al."Influence of principal stress rotation of unequal tensile and compressive stress amplitudes on characteristics of soft clay".Journal of Mountain Science 14.2(2017):369-381.
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