Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prediction Model of Dynamic Resilient Modulus of Cohesive Subgrade Soil Based on Triaxial Test System
Resilient modulus (MR) of cohesive subgrade soil is a critical parameter for pavement design and evaluation with mechanistic-empirical method. The objective of this paper was to establish a constitutive model of MR of cohesive subgrade soil on the basis of triaxial repeated loading tests considering moisture condition coupled with stress. Major findings can be seen from this study. Firstly, MR increases with the increase of confining pressure under the condition of the same deviator stress. The increase rate of MR of cohesive subgrade soil with higher water content is more obvious than that of cohesive subgrade soil with lower water content. Secondly, MR decreases with the increase of deviator stress under the condition of the same confining pressure. The decrease rate of MR of cohesive subgrade soil with different water contents keeps the same range, which keeps between 30 percent and 35 percent. Thirdly, the effect of deviator stress on MR is more than that of confining pressure. Cohesive subgrade soil exhibits the feature of the stress softening. Finally, the predicted value of MR based on the established constitutive model has a good relevancy to its measure value. There is litter doubt that these findings provide practical supports for attaining MR in the design of pavement structure.
Prediction Model of Dynamic Resilient Modulus of Cohesive Subgrade Soil Based on Triaxial Test System
Resilient modulus (MR) of cohesive subgrade soil is a critical parameter for pavement design and evaluation with mechanistic-empirical method. The objective of this paper was to establish a constitutive model of MR of cohesive subgrade soil on the basis of triaxial repeated loading tests considering moisture condition coupled with stress. Major findings can be seen from this study. Firstly, MR increases with the increase of confining pressure under the condition of the same deviator stress. The increase rate of MR of cohesive subgrade soil with higher water content is more obvious than that of cohesive subgrade soil with lower water content. Secondly, MR decreases with the increase of deviator stress under the condition of the same confining pressure. The decrease rate of MR of cohesive subgrade soil with different water contents keeps the same range, which keeps between 30 percent and 35 percent. Thirdly, the effect of deviator stress on MR is more than that of confining pressure. Cohesive subgrade soil exhibits the feature of the stress softening. Finally, the predicted value of MR based on the established constitutive model has a good relevancy to its measure value. There is litter doubt that these findings provide practical supports for attaining MR in the design of pavement structure.
Prediction Model of Dynamic Resilient Modulus of Cohesive Subgrade Soil Based on Triaxial Test System
Qiu, Xin (Autor:in) / Yang, Qing (Autor:in) / Wang, Bing-Ru (Autor:in) / Luo, Xiao-Hua (Autor:in)
2013
4 Seiten
Aufsatz/Kapitel (Buch)
Englisch
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