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A Study on Numerical Analysis of Flexible Pavements under Moving Vehicular Loads  

Park, Seoksoon ((주)청수엔지니어링)
Kim, Nakseok (경기대학교 토목공학과)
Publication Information
Journal of the Society of Disaster Information / v.7, no.3, 2011 , pp. 206-219 More about this Journal
Abstract
The important elements in pavement design criteria are the stress and strain distributions. To obtain reasonable stress and strain distribution, tire contact area and tire pressures are very important. This study presents a viscoelastic characterization of flexible pavement subjected to moving loads. During the test, both longitudinal and lateral strains were measured at the bottom of asphalt layers and in-situ measurements were compared with the results of numerical analysis. A 3-dimension finite element model was used to simulate each test section and a step loading approximation has been adopted to analyze the effect of a moving vehicle on pavement behaviors. For viscoelastic analysis, relaxation moduli, E(t), of asphalt mixtures were obtained from laboratory test. Field responses reveal the strain anisotropy (i.e., discrepancy between longitudinal and lateral strains), and the amplitude of strain normally decreases as the vehicle speed increases. In most cases, lateral strain was smaller than longitudinal strain, and strain reduction was more significant in lateral direction.
Keywords
Dynamic Load; Isotropic; Viscoelastic; Numerical Analysis; Step Loading;
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  • Reference
1 Huang, Y.H. (2004). Pavement Analysis and Design. Prentice Hall, New Jersey, USA.
2 Myers, L.A., Roque, R., Ruth, B.E., Drakos, C. (1999). Measurement of Contact Stresses for Different Truck Types to Evaluate Their Influence on Near-Surface Cracking and Rutting. Transportation Research Record 1655, Transportation Research Board(TRB), National Research Council, Washington D.C., USA.
3 Papagiannakis, A.T., Amoah, N., Taha, A. (1996). "Formulation for visco-elastic response of pavements under moving dynamic loads." Journal of Transportation Engineering, ASCE, Vol. 122, No.2, pp.140-145.   DOI   ScienceOn
4 Sebaaly, P.E, Tabatabaee, N. (1989). Effects of Tire Pressure and Type on Response of Flexible Pavement. Transportation Research Record 1227, Transportation Research Board(TRB), National Research Council, Washington D.C., USA.
5 Westergaard, H.M. (1925). "Stresses in concrete pavement computed by theoretical analysis." Public Roads, Vol.7, pp.25-35.
6 Yoo, P.J, AI-Qadi, I.L., Elseifi, M.A., Janajreh, I. (2006). "Flexible pavement responses to different loading amplitudes considering layer interface condition and lateral shear forces." International Journal of Pavement Engineering, Vol.7, No.1, pp.73-86.   DOI   ScienceOn
7 Yorder, E.J., Witczak, M.W. (1975). Principles of Pavement Design. Secondary Edition, Wiley, New York.
8 김낙석, 정진훈, 이재훈, 박창우 (2006). "원더링 장비 적용을 통한 아스팔트 포장 거통 특성 연구." 대한토목학회논문집, Vol.26 No.1D, pp.89-94.
9 서영국 (2006). 시험도로 아스팔트 포장의 장기공용수명 예측을 위한 점탄소성 유한요소모델의 개발. 한국도로공사도로교통기술원.