研究旧沥青混凝土路面上半刚性基层底面加铺土工格栅在车辆荷载下接缝处的应力情况,此类问题属于连续介质中存在裂缝缺陷的问题,相对而言有限元法是简单有效可行的方法。在此采用有限元法对有裂缝路面及旧路加宽路面进行力学分析。一、有限元程序简介1郾MSC郾NASTRAN有限元软件 The research on the stress condition of the geogrid on the bottom of the semi-rigid base pavement on the old asphalt concrete pavement under the vehicle load is a problem of the existence of the crack in the continuous medium. In contrast, the finite element method is simple, effective and feasible method. In this use of finite element method on cracked pavement and the old road to widen the road mechanics analysis. First, finite element program introduction 1 郾 MSC 郾 NASTRAN finite element software