CAJ | 학술논문

为了研究荷栽作用下沥青路面表面开裂的机理,采用不规则颗粒及颗粒接触界面生成的二维算法子程序,在指定的级配类型范围内随机生成沥青路面仿真体,分别赋予级配碎石颗粒和沥青粘结体相应的材料参数,对刹车荷载作用下沥青路面开裂的细观响应进行了分析.数值模拟结果表明:表面裂纹是随机的产生、裂纹路径的扩展是非连续和跳跃式的,局部裂纹相互干涉最后形成贯通的裂缝微扩展带导致了路面的开裂损坏.模拟结果证明了开裂的非连续性.
위료연구하재작용하력청로면표면개렬적궤리,채용불규칙과립급과립접촉계면생성적이유산법자정서,재지정적급배류형범위내수궤생성력청로면방진체,분별부여급배쇄석과립화력청점결체상응적재료삼수,대찰차하재작용하력청로면개렬적세관향응진행료분석.수치모의결과표명:표면렬문시수궤적산생、렬문로경적확전시비련속화도약식적,국부렬문상호간섭최후형성관통적렬봉미확전대도치료로면적개렬손배.모의결과증명료개렬적비련속성.
In order to ascertain asphalt pavement surface crack mechanism,2D generation algorithm about irregular particle generation and particle contact interface generation was adopted.Asphalt pavement simulations were randomly generated in the designated gradation categories.The material parameters were endowed to graded broken stone irregular particles and asphalt,and the micro-particles response of asphalt pavement surface crack under braking load was analyzed.The numerical simulation results demonstrate that(1)the surface crack is stochastic generated and the crack propagation is discrete as leaps and bounds development;(2)the through crack band due to surface micro-crack interference each other leads to asphalt pavement surface crack.The research result indicates the discontinuous extension of asphalt mixture surface crack propagation.