STUDY ON THE STRUCTURAL DESIGN OF PRECAST CONCRETE PAVEMENT

在我们以前的研究中，基于Winkler地基模型上的线弹性板，发展了预制混凝土路面板应力和挠度的板有限元计算方法。利用该方法进行了以下研究：1研究了预制销钉混凝土路面(PRCP)在隧道道路中的适用性。研究了底基层和横向接缝处的杆件对预应力混凝土板受力性能的影响。文中还讨论了PRCP中的温度应力。对普通混凝土路面(NCP)和普通混凝土路面(NCP)进行了疲劳和断裂分析，比较了PRCP和普通混凝土路面(NCP)的疲劳损伤和断裂数量。从分析结果可以看出，为了保证PRCP2的长期使用性能，必须提高混凝土的抗折强度和底基层反应模数。2通过小模型试验和有限元分析，研究了薄混凝土罩面在旧沥青路面修复中的适用性。研究结果揭示了板温和旧沥青路面下垫层温度的特点，以及路面温度对界面剪应力、弯曲应力和疲劳损伤的影响。3为了处理加铺层路面，对该模型进行了扩展

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