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  • Online Resource  (2)
  • Vilnius Gediminas Technical University  (2)
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  • 1
    Online Resource
    Online Resource
    STUDY ON NONLINEAR PAVEMENT RESPONSES OF LOW VOLUME ROADWAYS SUBJECT TO MULTIPLE WHEEL LOADS / NETIESINĖS KELIO DANGOS PRIKLAUSOMYBĖS NUO MAŽO INTENSYVUMO KELIŲ, VEIKIAMŲ DAUGKARTINĖMIS RATŲ APKROVOMIS, TYRIMAS
    Vilnius Gediminas Technical University ; 2011
    In:  Journal of Civil Engineering and Management Vol. 17, No. 1 ( 2011-04-13), p. 45-54
    Details
    In: Journal of Civil Engineering and Management, Vilnius Gediminas Technical University, Vol. 17, No. 1 ( 2011-04-13), p. 45-54
    Abstract: This paper describes numerical analyses on low volume roads (LVRs) using a nonlinear three-dimensional (3D) finite element model (FEM). Various pavement scenarios are analyzed to investigate the effects of pavement layer thicknesses, traffic loads, and material properties on pavement responses, such as surface deflection and subgrade strain. Each scenario incorporates a different combination of wheel/axle configurations and pavement geomaterial properties to analyze the nonlinear behavior of thinly surfaced asphalt pavement. In this numerical study, nonlinear stress-dependent models are employed in the base and subgrade layers to properly characterize pavement geomaterial behavior. Finite element analysis results are then described in terms of the effects of the asphalt pavement thickness, wheel/axle configurations, and geomaterial properties on critical pavement responses. Conclusions are drawn by the comparison of the nonlinear pavement responses in the base and subgrade in association with the effects of multiple wheel/axle load interactions. Santrauka Straipsnyje aprašoma skaitinė mažo intensyvumo kelių analizė, taikant netiesinį—erdvinį baigtinių elementų modelį. Skirtingi dangų paviršiaus variantai analizuojami siekiant ištirti, kokiąįtaką kelio dangos elgsenai, t. y. poslinkiams ir kelio pagrindo deformacijoms, turi dangų sluoksnių storiai, eismo apkrovos ir medžiagų savybės. Kiekvienas kelio dangos variantas turi skirtingas ratų arba ašies ir geometrinių savybių formas, kad būtų galima išanalizuoti netiesinę plonos asfalto dangos paviršiaus elgseną. Šioje skaitinėje analizėje nagrinėjami netiesiniai įtempių modeliai, kurie buvo taikomi pagrindo sluoksniams, siekiant tinkamai apibūdinti geometrinę kelio dangos elgseną. Baigtinių elementų analizės rezultatai toliau nagrinėjami atsižvelgiant į asfalto dangos storį ar ašies formą ir geometrines savybes, priklausomai nuo kritinės kelio dangos būklės. Išvados buvo gautos lyginant netiesines kelių dangos priklausomybes pagrindo sluoksnyje, atsižvelgiant į jų sąveiką su daugkartine ratų apkrova.
    Type of Medium: Online Resource
    ISSN: 1392-3730 , 1822-3605
    URL: Article
    DOI: 10.3846/13923730.2011.554012
    Language: Unknown
    Publisher: Vilnius Gediminas Technical University
    Publication Date: 2011
    detail.hit.zdb_id: 2571620-7
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  • 2
    Online Resource
    Online Resource
    EFFECTS OF GEOGRID REINFORCEMENT IN LOW VOLUME FLEXIBLE PAVEMENT
    Vilnius Gediminas Technical University ; 2013
    In:  Journal of Civil Engineering and Management Vol. 19, No. Supplement_1 ( 2013-10-24), p. S14-S22
    Details
    In: Journal of Civil Engineering and Management, Vilnius Gediminas Technical University, Vol. 19, No. Supplement_1 ( 2013-10-24), p. S14-S22
    Abstract: This paper presents findings of a study on geogrid reinforced flexible pavement in a low volume road through a three-dimensional finite element analysis. A mechanistic model was developed for geogrid reinforced flexible pavement. To analyze the behavior of pavement foundation, stress-dependent resilient modulus models were employed in both base and subgrade layers. The model also incorporated previous research findings to enhance the reliability of the analysis. During the analysis, comparisons were made to contrast the responses of low volume flexible pavement with and without geogrid. The results show geogrid reinforcement reduces critical pavement responses under traffic loading, such as vertical surface deflection, tensile strain in asphalt concrete, and compressive strain in subgrade. The study found up to 18% reduction of vertical strain at the top of subgrade and 68% reduction of tensile strain at the bottom of asphalt concrete. Also, geogrid provides confining stresses in the adjacent aggregate layer, which leads to surrounding layers becoming stiffer. Based on the results of this study, the placement of geogrid reinforcement on top of weak subgrade was found particularly effective compared to that on strong subgrade.
    Type of Medium: Online Resource
    ISSN: 1392-3730 , 1822-3605
    URL: Article
    DOI: 10.3846/13923730.2013.793606
    Language: Unknown
    Publisher: Vilnius Gediminas Technical University
    Publication Date: 2013
    detail.hit.zdb_id: 2571620-7
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