DEVELOPMENT OF STRUCTURAL DESIGN SYSTEM FOR COMPOSITE PAVEMENT WITH CONTINUOUSLY REIN FORCED CONCRETE BASE

本研究旨在发展一套连续配筋混凝土基层复合式路面结构设计系统。我们进行了两年的研究，并取得了以下结果：1。对混凝土路面的弹性板模型进行了扩展，考虑了沥青面层的影响。该模型通过一个专门开发的连接单元将两块板串联起来。通过对实验结果的分析，验证了扩展模型的正确性.开发了一个使用商用电子表格软件的结构设计系统原型。该系统使用输入数据（如横截面组成、底基层类型、交通条件和环境条件）来估计复合路面的疲劳损伤，所有这些数据都是通过电子表格界面输入的.通过对路面模型断面一年的温度实测分析，研究了沥青面层的温度效应，它降低了下卧混凝土基层的温度梯度。根据计算结果，推导出温度效应的简单表达式，为结构设计提供了依据.为了简化复合式路面设计中复杂的应力计算过程，我们尝试开发了一个基于神经网络的应力计算系统。目前，该系统的开发正在进行中。

The objective of this study is to develop a structural design system for composite pavement with continuously reinforced concrete base. We have conducted the study for two years and obtained the following results :1. The elastic plate model which we had developed for concrete pavement was expanded to take into account the effect of asphalt surface course. This model connects two plates in series with a specially developed link element. The expanded model was verified by analyzing the experimental results.2. A prototype of a structural design system using a commercially available spreadsheet software was developed. This system estimates the fatigue damage of a composite pavement using input data such as cross section composition, subbase type, traffic conditions and environmental conditions, all of which are input through a spreadsheet interface.3. Temperature effect of the asphalt surface course, which reduces the temperature gradient in underlying concrete base, was examined by analyzing one-year temperature measurement on model pavement sections. From the results, a simple equation which express the temperature effect was derived for the structural design.4. To simplify the procedure for the stress calculation which is very complicated in the composite pavement design, we have tried to develop a stress calculation system using the neural network. The development of this system is now underway.