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Structural Monitoring and Maintenance
  Volume 8, Number 2, June 2021 , pages 187-201

An architecture of lifecycle fatigue management of steel bridges driven by Digital Twin
Fei Jiang, Youliang Ding, Yongsheng Song, Fangfang Geng and Zhiwen Wang

    The fatigue of steel bridges poses a great threat to their safety and functionality. However, current approaches for fatigue management are largely based on heuristic design philosophies, physical testing, and bridge managers' experience. This paper proposes a closed lifecycle fatigue management driven by Digital Twin for steel bridges. To provide clarity around the concept, the definition of Digital Twin for steel bridges is given at first. Then eight functional modules supporting Digital Twin are outlined in detail, aiming to provide a reference for the future development of Digital Twin in fatigue management. Finally, the implementation mechanism of Digital Twin is further described over different phases during the bridge lifecycle. This paper also identifies two main obstacles for the development of Digital Twin: i) the lack of understanding of steel bridge fatigue, and ii) the insufficiency of the present technologies.
Key Words
    Digital Twin; bridge maintenance; fatigue life evaluation; lifecycle management; steel bridges
(1) Fei Jiang, Youliang Ding:
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, No. 2 Sipailou, Xuanwu District, Nanjing 210096, China;
(2) Yongsheng Song:
School of Architecture Engineering, Jinling Institute of Technology, No. 99 Hongjing Avenue, Jiangning District, Nanjing 211169, China;
(3) Fangfang Geng:
School of Architecture Engineering, Nanjing Institute of Technology, No. 1 Hongjing Avenue, Jiangning District, Nanjing 211167, China;
(4) Zhiwen Wang:
Shenzhen Express Engineering Consulting Co. Ltd., 268 Meiao 1st Road, Futian District, Shenzhen 518000, China.

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