Evaluation and sensitivity of pavement-subgrade systems

一个国家公路网的健康状况对其经济具有相当重要的意义。在大多数工业化国家，网络已经相当完善，因此重点已转向监测、维护和改进现有的基础设施。由于反复的交通负荷和环境因素，如潮湿和冻融循环，路面随着时间的推移逐渐恶化。鉴于交通量和车轮负荷的增加，开发以下材料变得越来越重要：能够更好地抵抗与交通和气候条件相关的损害的材料；以及新的设计和维护工具，帮助监测道路基础设施并制定与维护战略和修复有关的成本效益解决方案。路面分析和设计的新的力学-经验方法要求更准确地估计材料在模拟交通荷载作用下的响应，并考虑湿度和温度条件的变化。

The health of a country's road network is of considerable importance to its economy. In most of the industrialized world, the network is fairly well established, thus emphasis has shifted toward monitoring, maintaining and improving the existing infrastructure. Pavements deteriorate gradually over time due to repetitive traffic loading and environmental factors such as moisture and freeze-thaw cycles. Given the increase in traffic volume and wheel loads, it has become increasingly important to develop: materials that can better resist damage associated with the traffic and climatic conditions; and new design and maintenance tools that aid in monitoring the road infrastructure and developing cost effect solutions with respect to maintenance strategies and rehabilitation. The new mechanistic-empirical approach for pavement analysis and design requires more accurate estimates of the material response under the action of simulated traffic loading, taking into account variations in moisture and temperature conditions.