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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Probabilistic method for evaluating the permanent strain of unbound granular materials under cyclic traffic loading
https://orcid.org/0000-0003-4467-9708
https://orcid.org/0000-0002-1996-960X
Highlights Increasing confining pressure inhibits the rate of permanent strain (ε p) of UGMs. The ε p of stable specimens initially rapidly increases and then gradually stabilizes. The model parameter that implies the rate of ε p is strongly correlated with η and w. A probabilistic method was proposed to predict the development range of ε p.
Abstract In this study, a series of large-scale cyclic triaxial tests with different water contents (w), confining pressures (σ 3), and dynamic deviatoric stresses (σ d) is performed to investigate the accumulative permanent strain (ε p) behavior of an unbound granular material (UGM) used in the construction of railway subgrade beds. Results indicate that an increase in confining pressure effectively inhibits the development rate of ε p, and the ε p behavior of stable specimens can be categorized into an initial rapidly increasing stage and a subsequent gradual stabilization stage, with different causes of material strain at each stage. The permanent strain accumulated from the first loading cycle, i.e., the model parameter a, demonstrates a power function relationship with the dynamic-static deviatoric stress ratio (η), and the model parameter b, which implies the increasing rate of ε p, is strongly correlated with η and w. A probabilistic method based on a semi-logarithmic prediction model and probabilistic failure theory is proposed to evaluate the development range of ε p of UGMs while considering the effects of the confining pressure, dynamic deviatoric stress, static failure deviatoric stress, and water content. Applications of the proposed method indicate that the developed probabilistic model can yield acceptable ε p predictions of UGMs.
Probabilistic method for evaluating the permanent strain of unbound granular materials under cyclic traffic loading
https://orcid.org/0000-0003-4467-9708
https://orcid.org/0000-0002-1996-960X
Highlights Increasing confining pressure inhibits the rate of permanent strain (ε p) of UGMs. The ε p of stable specimens initially rapidly increases and then gradually stabilizes. The model parameter that implies the rate of ε p is strongly correlated with η and w. A probabilistic method was proposed to predict the development range of ε p.
Abstract In this study, a series of large-scale cyclic triaxial tests with different water contents (w), confining pressures (σ 3), and dynamic deviatoric stresses (σ d) is performed to investigate the accumulative permanent strain (ε p) behavior of an unbound granular material (UGM) used in the construction of railway subgrade beds. Results indicate that an increase in confining pressure effectively inhibits the development rate of ε p, and the ε p behavior of stable specimens can be categorized into an initial rapidly increasing stage and a subsequent gradual stabilization stage, with different causes of material strain at each stage. The permanent strain accumulated from the first loading cycle, i.e., the model parameter a, demonstrates a power function relationship with the dynamic-static deviatoric stress ratio (η), and the model parameter b, which implies the increasing rate of ε p, is strongly correlated with η and w. A probabilistic method based on a semi-logarithmic prediction model and probabilistic failure theory is proposed to evaluate the development range of ε p of UGMs while considering the effects of the confining pressure, dynamic deviatoric stress, static failure deviatoric stress, and water content. Applications of the proposed method indicate that the developed probabilistic model can yield acceptable ε p predictions of UGMs.
Probabilistic method for evaluating the permanent strain of unbound granular materials under cyclic traffic loading
https://orcid.org/0000-0003-4467-9708
https://orcid.org/0000-0002-1996-960X
Highlights Increasing confining pressure inhibits the rate of permanent strain (ε p) of UGMs. The ε p of stable specimens initially rapidly increases and then gradually stabilizes. The model parameter that implies the rate of ε p is strongly correlated with η and w. A probabilistic method was proposed to predict the development range of ε p.
Abstract In this study, a series of large-scale cyclic triaxial tests with different water contents (w), confining pressures (σ 3), and dynamic deviatoric stresses (σ d) is performed to investigate the accumulative permanent strain (ε p) behavior of an unbound granular material (UGM) used in the construction of railway subgrade beds. Results indicate that an increase in confining pressure effectively inhibits the development rate of ε p, and the ε p behavior of stable specimens can be categorized into an initial rapidly increasing stage and a subsequent gradual stabilization stage, with different causes of material strain at each stage. The permanent strain accumulated from the first loading cycle, i.e., the model parameter a, demonstrates a power function relationship with the dynamic-static deviatoric stress ratio (η), and the model parameter b, which implies the increasing rate of ε p, is strongly correlated with η and w. A probabilistic method based on a semi-logarithmic prediction model and probabilistic failure theory is proposed to evaluate the development range of ε p of UGMs while considering the effects of the confining pressure, dynamic deviatoric stress, static failure deviatoric stress, and water content. Applications of the proposed method indicate that the developed probabilistic model can yield acceptable ε p predictions of UGMs.
Probabilistic method for evaluating the permanent strain of unbound granular materials under cyclic traffic loading
Xu, Fang (Autor:in) / Zhai, Bin (Autor:in) / Leng, Wuming (Autor:in) / Yang, Qi (Autor:in) / Leng, Huikang (Autor:in) / Nie, Rusong (Autor:in)
01.04.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Stress–Strain Response of Unbound Granular Materials Under Static and Cyclic Loading
| Springer Verlag | 2015
Stress–Strain Response of Unbound Granular Materials Under Static and Cyclic Loading
| Online Contents | 2015
Modeling of unbound granular material under cyclic loading
| British Library Conference Proceedings | 2007