An FE analysis of reinforced subgrade under automobile loading |
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Authors: | Yan Shuwang Zhang Xinqiang Liu Run |
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Institution: | (1) School of Institute of Civil Engineering, Tianjin University, 300072 Tianjin, China |
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Abstract: | An FE analysis procedure was presented to predict the behavior of soil-geogrid interaction under automobile loading. The dynamic
interactions between the transverse bars, the longitudinal ribs and the soil were simulated by a system consisting of nonlinear
springs, dashpots and masses, to study the deformation properties of the reinforced soil. The equivalent stiffness and damping
ratios could be determined with the shaking table. The dynamic responses of a reinforce subgrade were analyzed with the 3D
finite element approach. This approach is programmed and applied to analyze the soil-geogrid interaction under dynamic loading.
The comparative analysis of the response of the reinforced subgrade and that of the subgrade without reinforcement shows that
the geogrid placed at the bottom of the base layer may effectively reduce the accumulative plastic deformation due to the
cyclic automobile loading. |
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Keywords: | reinforced soil soil-geogrid dynamic interaction deformation spring-dashpot-mass system |
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