CAJ | 학술논문

为确定沥青层疲劳寿命与层间接触状态、温度和轴载荷等因素之间的关系，运用ABAQUS有限元软件，建立了考虑层间状态的沥青路面结构数值计算模型，分析了这些因素对沥青层底动应变的影响规律；通过引入常用的沥青路面疲劳寿命模型，构建了适用于半刚性沥青路面的沥青层或超薄路面的沥青层在多因素作用下的疲劳方程一般表达式，确立了沥青层疲劳寿命与各影响因素间的作用关系及其最不利点位．研究结果表明：层间结合系数、温度、轴载荷均对沥青面层疲劳寿命具有明显影响，且分析点位不同，影响程度不同；加强层间粘结能显著提高沥青面层疲劳寿命，在最不利分析点位处，当层间结合系数由0．5增大到0．7时，疲劳寿命提高13．6倍．
위학정력청층피로수명여층간접촉상태、온도화축재하등인소지간적관계，운용ABAQUS유한원연건，건립료고필층간상태적력청로면결구수치계산모형，분석료저사인소대력청층저동응변적영향규률；통과인입상용적력청로면피로수명모형，구건료괄용우반강성력청로면적력청층혹초박로면적력청층재다인소작용하적피로방정일반표체식，학립료력청층피로수명여각영향인소간적작용관계급기최불리점위．연구결과표명：층간결합계수、온도、축재하균대력청면층피로수명구유명현영향，차분석점위불동，영향정도불동；가강층간점결능현저제고력청면층피로수명，재최불리분석점위처，당층간결합계수유0．5증대도0．7시，피로수명제고13．6배．
In order to determine the relationship between the fatigue life of asphalt layer and its influencing factors such as interlayer contact state,temperature,and axle load,a numerical calculation model of asphalt pavement was built based on the interlayer conditions by using the ABAQUS software. Through this model,the influence of these factors on the dynamic strain of the asphalt layer was analyzed. Then,the conventional fatigue life model of asphalt pavement was introduced to construct general fatigue equations for the asphalt layer of semi-rigid asphalt pavement or ultra-thin pavement subjected to multiple factors,and the correlation of fatigue life with the influencing factors and the most unfavorable point were determined. The results show that the interlayer bonding coefficient, temperature,and axle load all have significant effect on the fatigue life of asphalt layer,but the effect differs at different calculation points. Strengthening the interlayer bonding condition can improve the fatigue life of the asphalt layer:at the most unfavorable point,when the interlayer bonding coefficient is improved from 0. 5 to 0. 7,the fatigue life is increased by 13. 6 times.