| 引用本文: | 郑凯锋,冯霄暘,何晓晖,衡俊霖,李乐,王洪福.焊接残余应力对钢桥面疲劳性能的影响与处理措施[J].哈尔滨工业大学学报,2024,56(3):29.DOI:10.11918/202210041 |
| ZHENG Kaifeng,FENG Xiaoyang,HE Xiaohui,HENG Junlin,LI Le,WANG Hongfu.Influence of welding residual stress on fatigue performance of steel bridge deck and treatment measures[J].Journal of Harbin Institute of Technology,2024,56(3):29.DOI:10.11918/202210041 |
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| 焊接残余应力对钢桥面疲劳性能的影响与处理措施 |
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郑凯锋1,冯霄暘1,何晓晖2,衡俊霖3,4,李乐5,王洪福5
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(1.西南交通大学 土木工程学院,成都 610036;2.深圳市市政设计研究院有限公司,广东 深圳 518060; 3.深圳大学 土木与交通工程学院,广东 深圳 518060;4.代尔夫特理工大学 土木工程与地球科学学院, 荷兰 代尔夫特 2628 CN;5.中建五洲工程装备有限公司,南京 210046)
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| 摘要: |
| 为改善正交异性钢桥面的抗疲劳性能,对钢桥面进行退火处理以降低关键焊缝的焊接残余应力。首先系统性地回顾和探讨钢桥面焊接残余应力分布模式,同时就残余应力对疲劳裂纹发展的影响进行了文献分析。随后,归纳和总结了国内外主流焊接残余应力消除方法,并开展对比分析。借鉴压力容器制造方法,建议在正交异性钢桥面制造中引入退火处理工艺以降低焊接残余应力。研究聚焦钢桥面中疲劳问题较突出的顶板与U肋连接焊缝,设计了16个(其中9个退火处理,7未作处理)局部足尺单U肋试件进行残余应力测试与疲劳试验。试验结果表明,退火处理后焊缝残余应力实测值降低约80%,疲劳强度提高约23%。可以看出,退火处理可以大幅降低焊接残余应力,从而有效提升钢桥面抗疲劳性能。 |
| 关键词: 桥梁工程 正交异性钢桥面 焊缝 退火处理 焊接残余应力 疲劳开裂 |
| DOI：10.11918/202210041 |
| 分类号:U441.4 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51778536);中建股份科技研发计划(CSCEC-2021-Z-32) |
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| Influence of welding residual stress on fatigue performance of steel bridge deck and treatment measures |
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ZHENG Kaifeng1,FENG Xiaoyang1,HE Xiaohui2,HENG Junlin3,4,LI Le5,WANG Hongfu5
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(1.School of Civil Engineering, Southwest Jiaotong University, Chengdu 610036, China; 2.Shenzhen Municipal Design and Research Institute Co., Ltd., Shenzhen 518060, Guangdong, China; 3.College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 4.Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft 2628 CN, the Netherlands; 5.China Construction Equipment and Engineering Co., Ltd., Nanjing 210046, China)
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| 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. |
| Key words: bridge engineering orthotropic steel decks welded joint annealing welding residual stress fatigue cracking |
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