Experimental Study on Fatigue Resistance of Asphalt Mixture Based on Damage Theory
In order to systematically study the road performance attenuation process of asphalt mixture in the fatigue failure process,four-point bending fatigue tests were carried out under different temperatures,strains and frequencies.Based on the damage theory,the anti-fatigue performance of asphalt mixture was evaluated from the changes of stiffness modulus and dissipation energy.The influence of test factors on the fatigue resistance of asphalt mixture was discussed by damage area method and grey correlation analysis method.The results show that the anti-fatigue performance of asphalt mixture can be described by the logarithmic curve based on the dissipated energy of the damage factor with the change of loading times,and that the fatigue life should be determined by the initial damage and damage accumulation rate.The fatigue life of asphalt mixture increases with the increase of temperature,and it decreases with the increase of strain,and reduces with the increase of frequency.The analysis results of stiffness modulus and dissipation energy both show that temperature has a larger influence on fatigue life than strain.Stiffness modulus analysis shows that frequency has the most influence on fatigue life,and dissipation energy analysis shows that the correlation between frequency and fatigue life is not significant.
Four-point bending fatigueDamage theoryDissipation canGrey correlation analysisDamage area method
国家科技期刊平台
NSTL
万方数据
维普
