Effect of Interface Conditions on Flexible Pavement Fatigue Cracking Using 3D Finite Element Analysis

3차원 유한요소해석을 통한 연성포장의 층간접촉특성이 피로균열에 미치는 영향 평가

To determine design or remaining life of flexible pavement, tensile strain at the bottom of asphalt concrete course and vertical strain on top of subgrade should be estimated. Various computer programs can be used for determining the strain at the critical position in pavement. However, these are conducted under the assumptions of full bonded or unbound state of layer interface conditions. This study compares the output of finite element analysis and multi-layer elastic analysis as vertical load was applied to the surface of flexible pavement. It is noted that the pavement performance is significantly affected depending upon the interface conditions.