A mechanistic approach for modeling deterioration of flexible pavement | |
| Author | Qureshi, Jawed |
| Call Number | AIT Thesis no.ST-05-20 |
| Subject(s) | Pavements, Flexible Finite element method |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-05-20 |
| Abstract | The elastic multilayered programs are widely used to predict the flexible pavement response. This type of analysis assumes that flexible pavement is subjected to static loads only and material behaves in elastic range. However, asphalt mixtures are nonlinear viscoelastic materials and granular materials exhibit nonlinear elastic-plastic behavior. In this study, ANSYS, a general purpose finite element program, is used to predict response of flexible pavement to static and dynamic loads. A variety of material constitutive models such as linear elastic, nonlinear elasticplastic and nonlinear viscoelastic are used to describe pavement material behavior. The finite element model is validated by comparing its results with elastic multilayered program, KENLAYER. Three different formulations namely plane strain, axisymmetric and three dimensional, were evaluated to facilitate the selection of an appropriate modeling technique for flexible pavement. It was found that three dimensional formulation is suitable for any type of loading and boundary conditions. Dynamic viscoelastic nonlinear analysis is performed at various speeds and temperatures to investigate the effect of these parameters on elastic and plastic deformations of flexible pavement. Finite element analysis, if validated properly, can be extremely useful in predicting the mechanistic parameters without performing expensive field experiments. |
| Year | 2005 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-05-20 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Barry, William Joseph; |
| Examination Committee(s) | Pannapa Herabat;Pichai Nimityongskul; |
| Scholarship Donor(s) | Higher Education Commission / Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |