Simulation study on dowel bar layout mode of cement concrete pavement

To optimize dowel bar spacing design in cement concrete pavement,a single-layer structure model on Winkler subgrade with consideration of unfavorable load was established based on finite element theory.The model parameters were set according to the pavement design specifications in our country.The panel's mechanical responses under different dowel setting conditions were got based on the model.The relationship of LTE and spacing,LTE and panel maximum displacement were calculated and the effects of wheel track concentrated dowel layout were analyzed.The results show that when dowels are equally displaced,under the calculation model of LTE versus spacing,LTE changes slightly when spacing varies between 450 mm to1800mm;the wheel track concentrated dowel about can improve the LTE value by 3.015%on average,and the improvement value grows with the decrease of dowel bar number;when the LTE values equal,the wheel track concentrated dowel layout can reduce the number of dowels by 1on average,and compared with the equal dowel layout,even one dowel reduction still has a favorable impact on the panel displacement,and there is good economic benefit.