STUDY ON THE STRUCTURAL DESIGN OF PRECAST CONCRETE PAVEMENT

在前人的研究中，基于Winkler基础模型的线弹性板，建立了估算预制混凝土路面板应力和挠度的板有限元方法。利用该方法进行了以下研究：1 .研究了带榫缝的预制混凝土路面在隧道道路中的适用性。研究了横向节点的底筋和销筋对PRCP力学行为的影响。还讨论了PRCP中的热应力。进行了疲劳和断裂分析，比较了PRCP与普通混凝土路面的疲劳损伤和断裂数量。分析结果表明，为了保证prcp的长期性能，需要提高混凝土的抗弯强度和底基反应模量。通过小模型试验和有限元分析，研究了薄混凝土加铺层在旧沥青路面修复中的适用性。研究结果揭示了既有沥青路面板坯温度和下垫面的特征，以及路面温度对界面剪切应力、弯曲应力和疲劳损伤的影响这个模型被扩展以处理覆盖的路面

In our previous studies, a plate finite element method (FEM) for estimating stresses and deflections in precast concrete pavement slab has been developed based on the linear elastic plate on Winkler foundation model. Using this method, the following researches were conducted :1 Applicability of precast concrete pavement (PRCP) with doweled joints to tunnel roads was investigated. The effects of subbase and dowel bars at transverse joints on the mechanistic behaviors of PRCP were examined. The thermal stresses in PRCP were also discussed. Fatigue and faulting analyzes were conducted to compare the fatigue damage and amount of faulting of PRCP with those of normal concrete pavement (NCP). From the results of the analyzes, it was found that increasing flexural strength of concrete and modulus of subbase reaction is required to ensure long term perfoumance of PRCP.2 Applicability of thin concrete overlay to the rehabilitation of old asphalt pavement was investigated with small model experiments and FEM analysis. As the results, the characterisics of slab temperature and underlying existing asphalt pavement, the effects of the pavement temperature on the interface shear stress and bending stress and fatigue damage are revealed.3 This model was extended in order to handle the overlayd pavements