Stress analysis and structural design of surface course bottom in composite cement concrete pavement based on finite element method
To meet the usage requirements of composite cement concrete pavements under heavy traffic,a design scheme is proposed that uses lean concrete as the base material and asphalt mortar as the functional layer for the cement concrete pavement.The software ANSYS is used to perform mechanical response analysis on different pavement structures.The research results indicate that when the base material is changed from water-stabilized crushed stone to lean concrete,the load stress at the bottom of the cement concrete surface layer decreases by 14.87％,the temperature stress decreases by 2.70％,and the temperature-load coupling stress decreases by 10.02％.As the elastic modulus of lean concrete increases from 12 GPa to 16 GPa,the reduction in stress becomes less pronounced,with load stress,temperature stress,and temperature-load coupling stress decreasing by 3.60％,1.09％,and 4.14％,respectively.The numerical analysis results for load stress and temperature stress show that the relative difference with theoretical calculations is less than 10％,while the relative difference for temperature-load coupling stress is larger.For the design of composite cement concrete pavement structures for heavy traffic and moderate traffic volume levels,the stress verification results indicate that the two designed pavements meet the usage requirements.
composite cement concrete pavementlean concretebottom stresspavement structurefinite element simulationtraffic volume
万方数据
维普
