【摘要】 针对半刚性路面的特点,依据弹性层状体系理论,将半刚性路面的沥青层、半刚性基层、半刚性底基层及土基层按线弹性来考虑,建立了半刚性路面的三维有限元分析模型,采用ANSYS有限元分析软件分析了动态荷载下半刚性路面的应力特性。结果表明,路面的疲劳破坏是动载引起的水平应力、横向应力和垂直应力共同作用的结果,水平应力的交变变化是使路面产生疲劳破坏的主要因素。在一定的车速下,随着载荷的增加,半刚性底基层底部的最大水平拉应力增大;在一定的载荷下,随着行车速度的提高,半刚性底基层底部的最大水平拉应力减小,提高行车速度可以减小路面的损伤程度。更多还原

【Abstract】 A 3-D FEA model of half rigid road was established based on the elastic layered theory and the stress of the half rigid road caused by a dynamic vehicle load was analyzed with ANSYS software.The results indicated that the fatigue cracking was the combined actions of horizontal stress,transverse stress and vertical stress under dynamic vehicle load,and the alternate horizontal stress was the main factor.At the same time,under a certain vehicle speed the maximum horizontal tensile stress of the half rigid road will increase with increasing load,under a certain load the maximum horizontal tensile stress of the half rigid road will decrease with increasing vehicle speed.Therefore,increasing speed vehicles could decrease the damage to the pavement.更多还原