Pavement infrastructure is experiencing unanticipated climate conditions due to global warming. Extreme weather events, such as excessive precipitations, are increasing in intensity and frequency under climate change, which pose a flood risk to pavement infrastructure. The impact of flooding on pavements has become a rising concern since pavements are designed based on historical data, which do not adequately reflect current and future climate. Therefore, a comprehensive understanding of the flooding impacts on pavements is of great importance. The objective of this study is to analyse the impact of flooding on pavement performance. Damage pattern, flood characteristics, impact factor analysis and a case study were performed. The Mechanistic-Empirical Pavement Design Guide is employed to simulate the effect of 36 extreme hydrologic events on 2 typical pavement designs in Ontario, Canada. Extreme precipitation magnitude, number of event cycles and duration were loaded on typical pavement structures. Results show that there is no significant damage caused by short-duration exposure of extreme precipitation, and extreme events contribute to international roughness index changes. The increase of the number of event cycles leads to the increase of damage ratio. In addition, the loss of pavement life is unneglectable for long duration and higher cycle extreme events.

由于全球变暖，路面基础设施正在经历意想不到的气候条件。在气候变化下，极端天气事件（例如过多的降雨）的强度和频率在增加，这对人行道基础设施构成了洪水风险。洪水对人行道的影响已成为人们日益关注的问题，因为人行道是根据历史数据设计的，无法充分反映当前和未来的气候。因此，全面了解洪水对人行道的影响非常重要。这项研究的目的是分析洪水对路面性能的影响。进行了破坏模式，洪水特征，影响因素分析和案例研究。《机械-经验路面设计指南》用于模拟36个极端水文事件对加拿大安大略省2种典型路面设计的影响。极端降水量，事件周期数和持续时间被加载到典型的路面结构上。结果表明，极端降雨的短期暴露不会造成重大损害，极端事件会导致国际粗糙度指数变化。事件周期数的增加导致损坏率的增加。此外，路面寿命的损失对于长时间持续和较高周期的极端事件而言是不可忽视的。结果表明，极端降雨的短期暴露不会造成重大损害，极端事件会导致国际粗糙度指数变化。事件周期数的增加导致损坏率的增加。此外，路面寿命的损失对于长时间持续和较高周期的极端事件而言是不可忽视的。结果表明，极端降雨的短期暴露不会造成重大损害，极端事件会导致国际粗糙度指数变化。事件周期数的增加导致损坏率的增加。此外，路面寿命的损失对于长时间持续和较高周期的极端事件而言是不可忽视的。