Title
焊接残余应力对钢桥面疲劳性能的影响与处理措施
Author
Zheng, Kaifeng (Southwest Jiaotong University)
Feng, Xiaoyang (Southwest Jiaotong University)
He, Xiaohui (Shenzhen Municipal Design and Research Institute Co., Ltd.)
Heng, J. (TU Delft Steel & Composite Structures; Shenzhen University)
Li, Le (China Construction Equipment and Engineering Co., Ltd.)
Wang, Hongfu (China Construction Equipment and Engineering Co., Ltd.)
Date
2024
Abstract
In order to improve the fatigue resistance of orthotropic steel decks (OSDs), the steel bridge deck was annealed to reduce the welding residual stress of key welds. This work at first presented a systematical review and discussion over the distribution pattern of welding residual stress in OSDs, in accordance with a conceptual analysis respecting the impact of residual stress on fatigue crack propagation. Then, the associated summarization and comparison were made on the common approaches to mitigate the welding residual stress in the worldwide. By referring to the manufacturing of pressure vessels, the authors suggested to reduce welding residual stress by introducing annealing treatment to OSDs. On this basis, the study focused on the rib-to-deck welded joints that demonstrates a relatively prominent fatigue issue. The residual stress measurements and fatigue tests were carried out using a total of sixteen full-scale specimens, i. e., nine annealed specimens and seven as-welded ones without any additional treatment. The test results showed a reduction in the residual stress of welded joint in OSDs by 80% after the annealing, and moreover, an enhancement in the fatigue strength by 23% . Obviously, the annealing can significantly reduce the residual stress of the weld joints and effectively improve the fatigue resistance of OSDs.
Subject
annealing
bridge engineering
fatigue cracking
orthotropic steel decks
welded joint
welding residual stress
To reference this document use:
http://resolver.tudelft.nl/uuid:da9e1287-e9a2-4ff5-9654-1d4b146bd790
DOI
https://doi.org/10.11918/202210041
Embargo date
2024-10-01
ISSN
0367-6234
Source
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology, 56 (3), 29-37
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Kaifeng Zheng, Xiaoyang Feng, Xiaohui He, J. Heng, Le Li, Hongfu Wang