Mechanical Response Characteristics of High Modulus Asphalt Pavement under Multi-wheel Load
Under the loading of multiple wheels of aircraft landing gear,the mechanical response such as stress and strain inside the pavement will produce superposition and interference.The mechanical response of pavement structure was calculated by finite element software ABAQUS for high modulus asphalt airport pavement.The sensitivity of aircraft multi-wheel load to pavement mechanical response was analyzed,and the application effect of high modulus asphalt mixture in airport pavement was studied.The results show that under the six-wheel load of the main landing gear of the aircraft,the peak values of stress and surface deflection in the pavement structure are the largest,and the fatigue life of the pavement is the smallest.In the calculation of pavement structure and material composition design,six-wheel load should be the most unfavorable load condition.The stronger the symmetry of the wheel load is,the closer the peak point of the internal stress of the structure and the deflection of the road surface is to the center of the load surrounding area.The deformation of asphalt pavement has a certain time lag.After unloading,the deflection of the road surface cannot be recovered immediately and there is residual deformation.The more the number of main landing gear wheels,the longer the time lag,and the greater the residual deformation retained.The high modulus asphalt mixture used in the middle layer can reduce the stress level of tensile stress,compressive stress and shear stress in each layer of the pavement,thus effectively reducing the rut and fatigue cracking in the airport asphalt pavement.
airport pavementmulti-wheel loadfinite element simulationhigh modulus asphalt mixturemechanical response characteristic
万方数据
维普
