Unbound aggregate base (UAB) layers in multilayer pavement systems exhibit an intrinsic anisotropy that is characterized by directionally dependent material properties. This anisotropic nature is evident prior to experiencing traffic loads and partly arises from the random compaction-induced arrangement of the particles. The level of anisotropy substantially impacts pavement performance. To emphasize the influence of anisotropy, a finite element (FE) model for an inverted pavement structure was developed, considering varying ratios of horizontal Modulus (Ex) to vertical Modulus (Ey) for the UAB layer. The numerical simulation was based on the layer configuration of a full-scale inverted pavement constructed in Bull Run Route 659 in Virginia, consisting of an asphalt-wearing course, an UAB layer at the bottom, and an underlying cement-treated layer placed on top of the subgrade (SG) soil. Falling Weight Deflectometer (FWD) data were used to back-calculate the moduli of the layers. To validate the model, computed stresses and strains were compared to field measurements obtained from instruments embedded at critical depths within the pavement structure during construction. Pavement responses were modeled by incrementally adjusting the Ex/Ey ratios in steps of 0.1, from 0.1 representing highly anisotropic medium to 1.0 which corresponds to an idealized isotropic behavior. The numerical simulations demonstrate that modeling the UAB layer as a cross-anisotropic medium with a level of anisotropy in the proximities of 0.3 yields superior agreement between the calculated responses and measured data from the field.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Numerical Analysis of Representative Inverted Pavement Incorporating Cross-Anisotropic Material Properties for Unbound Granular Layers


    Weitere Titelangaben:

    Lecture Notes in Civil Engineering


    Beteiligte:
    Rujikiatkamjorn, Cholachat (Herausgeber:in) / Xue, Jianfeng (Herausgeber:in) / Indraratna, Buddhima (Herausgeber:in) / Rodriguez, Edgar (Autor:in) / Ashtiani, Reza (Autor:in) / Weingart, Randy (Autor:in)

    Kongress:

    International Conference on Transportation Geotechnics ; 2024 ; Sydney, NSW, Australia November 20, 2024 - November 22, 2024



    Erscheinungsdatum :

    24.10.2024


    Format / Umfang :

    12 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Cross-Anisotropic Characterization of Unbound Granular Materials

    Adu-Osei, Alex / Little, Dallas N. / Lytton, Robert L. | Transportation Research Record | 2001



    Use of Shredded Rubber in Unbound Granular Flexible Pavement Layers

    Speir, Richard H. / Witczak, Matthew W. | Transportation Research Record | 1996


    Use of Shredded Rubber in Unbound Granular Flexible Pavement Layers

    Speir, Richard / Witczak, Matthew | Transportation Research Record | 1996


    The Role of Water in Unbound Granular Pavement Layers: a Review

    Sangsefidi, Ebrahim / Wilson, Douglas James / Larkin, Tam Joseph et al. | Online Contents | 2019