【摘 要】
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Rutting is the major distress mode in flexible pavements occurring due to the repeated movement of traffic loading.Deformation in the pavements comprise of both recoverable(elastic)and irrecoverable(plastic)part.Overall deformation occurring in the flexib
【机 构】
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Department of Civil Engineering,Indian Institute of Technology Roorkee,Roorkee 247667,India;Departme
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Rutting is the major distress mode in flexible pavements occurring due to the repeated movement of traffic loading.Deformation in the pavements comprise of both recoverable(elastic)and irrecoverable(plastic)part.Overall deformation occurring in the flexible pavement system due to continuous vehicular movement is contributed from all the components of pavement.A number of empirical models have been proposed by several researchers for analysis and prediction of accumulated rutting in different components of pavement.The accumulated permanent strain has been expressed as the function of the number of load applications and deviator stress applications in most of the models pro-posed;however,factors such as stress state,moisture content,material type and envi-ronmental conditions also impose a significant influence on the permanent deformation characteristics of pavement materials under cyclic loading.In this article,a comprehensive review has been carried out covering every aspect of deformation related to distress occurring in pavements.Important rut models,modeling approaches and modem con-cepts in the rutting analysis of pavement structures have been presented.In addition to review,fallacy existing in the current design practices related to adaptation of stiffness parameters and negligence of shear strength aspect of subgrade soil has been also pre-sented with the support of literatures.
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