Development and application of a numerical model for fatigue performance assessment of UHPFRC-repaired RC bridge decks

1. 处理UHPFRC梁在不同荷载速度和龄期下的四点静态弯曲试验数据，以及不同应力水平下的疲劳弯曲试验数据。2 .对测试UHPFRC梁进行有限元分析，拟合实验数据，得到材料的降解规律。使用无损检测技术，如显微镜和CT扫描来研究测试样品，以揭示退化和破坏机制。利用成果2的退化规律，分析了UHPFRC加层加固钢甲板在干湿两种工况下的疲劳性能。

1. Process experimental data of UHPFRC beams obtained from 4-point static flexural tests under different load speeds and ages as well as fatigue flexural tests under different stress levels.2. Conduct FEA on the tested UHPFRC beams and fit the experimental data to obtain the material degradation law.3. Investigate the tested specimens using NDT techniques, such as microscope and CT scan to uncover the degradation and failure mechanisms.4. Analyze the fatigue performance of steel deck plate strengthened with UHPFRC overlay under dry and wet conditions using the degradation law obtained from Achievement 2.