Topology Optimization Design and Validation of Cement Concrete Pavement Structure for Truck Platooning

Abstract:

Truck platooning has proposed high bearing capacity and fine design requirement for pavement structure. In combination with the topology optimization theory， this paper proposes a topology optimization method of cement concrete pavement structure based on the solid isotropic microstructure with penalization （SIMP） method， the topology gradient method， and the method of moving asymptotes （MMA）. A prototype structure of cement concrete pavement is designed based on the numerical calculation， considering the analyzed wheel track characteristic of truck platooning. Finally， the scale experiment is employed to verify the mechanical property of the prototype structure. The results show that the maximum fatigue stress of the prototype is reduced to 45.0% and 37.5% of the traditional concrete pavement structure at a channelized traffic load and the traffic load with an offset of 15 cm respectively， and the weight is reduced to 34.3% and 30.5% of the traditional structure. The bearing capacity of the prototype structure measured by the experiment is 18.3% higher than the traditional structure， which proves the effectiveness of the design method.