Study on Mechanical Properties of Cement Concrete Pavement Joint with GFRP Dowels Under Moving Loads
A 3D finite element model of the cement concrete pavement of Zhaoyang West Ring Expressway is established using ABAQUS.The influence of the diameter of the load-bearing GFRP dowels,panel thickness,and modulus on the mechanical performance of the pavement joint is analyzed,and the mechanical performance indicators of the joint under different axle loads and vehicle speeds are evaluated.The results shows that the structure with a 30 cm C35 cement concrete panel and φ50 mm GFRP dowels has the best mechanical performance.Under the load condition of a vehicle speed of 80 km/h and an axle load of 250 kN,the maximum tensile stress value of the concrete around dowels is 1.421 MPa,meeting the specification requirements.Based on the finite element analysis results,road performance tests are conducted on models of GFRP dowels with different diameters to verify the accuracy of the numerical simulation results.This study provides references for the design parameters of GFRP load-bearing rods in cement concrete pavement and the limits of axle load and vehicle speed during pavement operation.
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