Numerical Simulation of Dynamic Response of Orthotropic Foundation-Viscoelastic Pavement Structure Under Moving Loads
[Purposes]Asphalt pavement structures are prone to typical damage under the action of heavy-duty vehicles.Numerical simulation was conducted using ABAQUS software to study the dynamic response of semi-rigid base asphalt pavement structures under actual vehicle loads at room temperature.[Methods]The semi-rigid base asphalt pavement road structure is simplified into a three-layer structure of surface layer,base layer,and roadbed.The viscoelasticity of the asphalt surface layer is described us-ing the Burgers model,and the roadbed soil is simulated using orthogonal anisotropic elastic media.The vehicle load on the road surface is simulated using moving harmonic loads.[Findings]Based on ABAQUS finite element analysis software,a semi-rigid base asphalt pavement structure model was es-tablished,and the orthogonal anisotropy of the roadbed soil,the influence of load movement speed and vi-bration frequency on the vertical displacement and vertical normal stress of the road surface were ana-lyzed.[Conclusions]Considering the orthogonal anisotropy performance of soil can more accurately de-scribe the dynamic response characteristics of roadbed and pavement,the frequency of load vibration and the speed of load movement have a significant impact on the vertical displacement and vertical normal stress of the road surface.
moving loadorthotropicviscoelastic pavementfinite element analysisProny series
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