Esnek üstyapılarda tekerlek temas gerilmesi ve deplasman dağılımlarının üç boyutlu sınır eleman metodu ile belirlenmesi

Abstract

 Flexible pavement design  Stress and deflection distributions on flexible pavements  3-D constant boundary elementIn this study, the boundary element method (BEM) was employed for the numerical determination of the response of flexible pavements. The material behaviour of the soil was assumed to be linear elastic. The BEM was used in the Fourier transform space. The focus of this paper is to determine the stress and deflection distributions in interior points of the elastic half space. Therefore, in the static analysis, formulation was considered for stress and deflection distributions on flexible pavements, since the purpose of the study is to analyse the influence of the load model on the pavement response, with the BEM formulation adopted for pavement design. The results of stress and deflection distributions on flexible pavements calculated by BEM are compared with the results obtained from Boussinesq equations published in the literature. Figure A. Load types on elastic half space Purpose:The focus of this study is to determine the stress and deflection distributions of interior points of the elastic half space. To achieve this aim, a computer program is developed for threedimensional elastic problems Theory and Methods:The static analysis, formulation was considered for stress and deflection distributions on flexible pavements, since the purpose of the study is to analyse the influence of the load model on the pavement response, with the BEM formulation adopted for pavement design. Results:The results, which were obtained using boundary element formulation, are presented and compared with the results obtained from Boussinesq formula ones. The both results obtained from BEM and Boussinesq formula are in perfect agreement with each Conclusion:Based on the formulation, general purpose computer program is developed, and it is applied to flexible pavement design problems. The formulation proposed in this paper is assessed by applying to the several problems. The results are obtained from BEM formulation and compared with those obtained from Boussinesq formulas. The comparisons showed that the formulation presented in this study can be used with a perfect confidence in calculation of the stresses and deflection distributions at any point of flexible pavement system and flexible pavement design problems.