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为了研究荷载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。
In order to study the mechanism of asphalt pavement surface cracking under load, a two-dimensional algorithm subroutine of irregular particles and particle contact interface was used to generate asphalt pavement simulation body randomly within the designated grading type, and graded gravel particles And bitumen bond material parameters corresponding to the crack under the action of asphalt pavement cracking cracking response was analyzed. The numerical simulation results show that the surface cracks are randomly generated, the crack propagation is discontinuous and leapfrogging, and the local cracks interfere with each other to finally form micro-propagation zones that lead to the cracking of the pavement. The simulation results show the non-continuity of cracking.