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

UHPFRC修复RC桥面板疲劳性能评估数值模型的开发与应用

• 批准号: 20K14808
• 负责人: DENG PENGRU
• 金额: $ 2.58万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K14808/
• 关键词: UHPFRC; Fatigue; OSD; FEM; CT scan; Rehabilitation; Bridge deck

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.

1.对UHPFRC梁在不同加载速度、不同龄期下的四点静力抗弯试验以及不同应力水平下的疲劳抗弯试验数据进行了处理.对试验梁进行有限元分析，并对试验数据进行拟合，得到材料退化规律.利用无损检测技术，如显微镜和CT扫描，对测试样品进行研究，以揭示退化和失效机制.利用成果2得出的退化规律，分析了干、湿工况下UHPFRC加铺层加固钢桥面板的疲劳性能。

项目成果

Bridging stress degradation model of UHPFRC from numerically fitting fatigue flexural test results using FEA

使用 FEA 数值拟合疲劳弯曲测试结果建立 UHPFRC 的桥接应力退化模型

• 发表时间: 2021
• 作者: Jimi;H.;Matsumoto;T;and Deng;P.
• 通讯作者: P.

Fatigue analysis of partly damaged RC slabs repaired with overlaid UHPFRC

叠加 UHPFRC 修复部分损坏 RC 板的疲劳分析

• 发表时间: 2020
• 期刊: Structural Engineering and Mechanics
• 影响因子: 2.2
• 作者: Deng;P. R.*;Kakuma;Ko.;Mitamura;H.;and Matsumoto;T.
• 通讯作者: T.

Experimental study about the effects of crack self-healing in UHPFRC on bending behaviors

UHPFRC裂纹自愈对弯曲性能影响的实验研究

• 发表时间: 2021
• 作者: Tsubaki Okuizumi;Pengru Deng;Takashi Matsumoto
• 通讯作者: Takashi Matsumoto

Fatigue analysis of a UHPFRC-OSD composite structure considering crack bridging and interfacial bond stiffness degradations

• DOI: 10.1016/j.engstruct.2021.113330
• 发表时间: 2021-12
• 期刊: Engineering Structures
• 影响因子: 5.5
• 作者: Cheng-hao Ma;P. Deng;Takashi Matsumoto

Stress reduction effects of ultra-high performance fiber reinforced concrete overlaid steel bridge deck developed with a new interfacial bond method

• DOI: 10.1016/j.conbuildmat.2022.127104
• 发表时间: 2022-04
• 期刊: Construction and Building Materials
• 影响因子: 7.4
• 作者: P. Deng;H. Mi;H. Mitamura;Takashi Matsumoto