Loading Stress Analysis of Double-layered Cement Concrete Pavement Structure Using Thin Shell Element
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U 416.216

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    Abstract:

    The cement concrete pavement on rigid or semi-rigid base is hereof simplified as a model of double-layered structure with unequal planar dimensions resting on an elastic foundation, under axle (tire) load, by using thin shell element the relationship between element meshing size and result accuracy is discussed, the locations and magnitudes of the maximum loading stresses in pavement structure under moving axle load along longitudinal edge are thoroughly studied, the effects of base extension on the maximum loading stresses in pavement and base are also analyzed, the results showed that with increase of the base extended amount the maximum loading stress in pavement will drop 0~33%; whereas the maximum stress in base will increase remarkably. Furthermore, the difference of the maximum loading stresses in pavement and base by using shell element and solid element is compared, when the thicknesses of pavement exceeding a limited value, the maximum stress in pavement based upon shell element is 0~20% larger than that of solid element; but in base is 2~30% smaller; in the end, the modified coefficient for the maximum stresses in pavement and base by using shell element is provided.

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ZHOU Yumin, TAN Zhiming, TIAN Bo. Loading Stress Analysis of Double-layered Cement Concrete Pavement Structure Using Thin Shell Element[J].同济大学学报(自然科学版),2010,38(5):685~691

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History
  • Received:January 06,2009
  • Revised:March 29,2010
  • Adopted:June 05,2009
  • Online: June 09,2010
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