CAJ | 학술논문

为了更好地理解沥青结合料的疲劳失效特性，以黏弹连续介质损伤力学为分析手段，通过加速疲劳试验和传统时间扫描疲劳试验系统研究了基质沥青和改性沥青在不同加载条件下的疲劳失效行为。研究发现，基于虚应变能理论提出的将最大存储虚应变能指标作为沥青加速疲劳试验中的疲劳失效新定义，与现象学指标相位角峰值有着很好的等效性，并和时间扫描试验中的疲劳失效定义保持了一致，进而依据疲劳失效定义建立了虚应变能释放率和材料疲劳寿命之间的特性关系准则。该特性准则与试验方法和加载条件无关，可作为统一的疲劳失效准则运用于沥青结合料的疲劳性能预测。
위료경호지리해력청결합료적피로실효특성，이점탄련속개질손상역학위분석수단，통과가속피로시험화전통시간소묘피로시험계통연구료기질력청화개성력청재불동가재조건하적피로실효행위。연구발현，기우허응변능이론제출적장최대존저허응변능지표작위력청가속피로시험중적피로실효신정의，여현상학지표상위각봉치유착흔호적등효성，병화시간소묘시험중적피로실효정의보지료일치，진이의거피로실효정의건립료허응변능석방솔화재료피로수명지간적특성관계준칙。해특성준칙여시험방법화가재조건무관，가작위통일적피로실효준칙운용우력청결합료적피로성능예측。
To better understand the fatigue failure characteristics of asphalt binder, the mechanic analysis approach of viscoelastic continuum damage ( VECD) was adopted. And both accelerated fatigue test and traditional time sweep fatigue test were employed to study the fatigue failure behavior of both neat and modified asphalt binders under different loading conditions. Test results indicate that the maximum stored pseudo strain energy ( PSE) , which is based on the PSE theory and proposed as the failure definition for accelerated fatigue test of asphalt binder, is equivalent to phenomenological parameter as phase angle peak and is also consistent with the fatigue failure defined in the time sweep tests. Based on the proposed failure definition, the characteristic relationship between PSE releasing rate and fatigue life was developed and found to be independent on testing methods and loading conditions. This characteristic relationship was proposed as the unified fatigue failure criterion for asphalt binder on fatigue performance prediction.