考虑腐蚀影响的钢箱梁顶板焊缝局部应力数值模拟分析
PDF下载 (212)揭志羽,朱建朝,王维国.考虑腐蚀影响的钢箱梁顶板焊缝局部应力数值模拟分析[J].宁波大学学报(理工版),2025,38(1):14-18.DOI:10.20098/j.cnki.1001-5132.2024.0601
JIE Zhiyu,ZHU Jianchao,WANG Weiguo.Numerical simulation analysis of local stresses of deck welds for steel box girder considering corrosion effect[J].Journal of Ningbo University(Natural Science & Engineering Edition),2025,38(1):14-18.DOI:10.20098/j.cnki.1001-5132.2024.0601
| Title: | Numerical simulation analysis of local stresses of deck welds for steel box girder considering corrosion effect |
| 作者: | 揭志羽, 朱建朝, 王维国 |
| Author(s): | JIE Zhiyu, ZHU Jianchao, WANG Weiguo |
| 关键词: | 钢箱梁; 腐蚀损伤; 幂函数模型; 热点应力; 有效缺口应力 |
| Keywords: | steel box girder; corrosion damage; power function model; hot spot stress; effective notch stress |
| 分类号: | U441+.4 |
| DOI: | 10.20098/j.cnki.1001-5132.2024.0601 |
| 文献标识码: | A |
| 摘要: | 为了腐蚀损伤对疲劳构造细节局部应力的影响, 钢箱梁节段模型为研究对象, 考虑种横向加载工况, 研究顶板焊缝热点应力和有效缺口应力的分布规律. 考虑环境腐蚀对顶板和横隔板厚度的影响, 得到顶板焊缝焊趾和焊根以及弧形缺口处应力随服役时间的变化规律. 结果表明: (1)焊根处的应力比焊趾和弧形缺口处的应力都大, 表明焊根更容易成为疲劳易损部位. (2)随着服役时间的增加, 钢板厚度减小, 应力总体增大, 顶板焊缝热点应力最大增幅达到56. (3)推荐采用有效缺口应力对顶板焊缝疲劳开裂问题进行研究, 且钢箱梁抗疲劳设计应当考虑环境腐蚀的影响. |
| Abstract: | In order to investigate the influence of corrosion on the local stress of fatigue vulnerable parts for steel box girders, the steel box girder segment model was employed. Three loading conditions in transverse direction were taken into account, so as to study their influences on the hot spot stress and effective notch stress at the vulnerable parts of the deck weld. Finally, the impact of environmental corrosion on the thickness of the top plate and the diaphragm was considered, and the variations in the stress with service time, at the weld toe, root and arc notch of the top plate, were obtained. The results show that the stress at the weld root is greater than those at both the weld toe and the arc notch, showing that the weld root is a more fatigue vulnerable part. The thickness of the steel plate decreases with the increase of service time, and the hot spot stress of deck weld increases by 56%. It is suggested that the effective notch stress should be used in studying the fatigue cracking of the deck weld, and the influence of environmental corrosion should be considered in the fatigue design of steel box girders. |
| 参考文献 /References: | [1].ALBRECHT P, HALL T T Jr. Atmospheric corrosion resistance of structural steels[J]. Journal of Materials in Civil Engineering, 2003, 15(1):2-24. [2].赵煜. 基于锈蚀损伤的组合钢桥结构状态评估及疲劳寿命预测[D]. 西安: 长安大学, 2007. [3].王卫东. 钢箱梁桥常见病害及其检测[J]. 城市道桥与防洪, 2014(12):131-135. [4].王献东. 钢桥易腐蚀构造细节研究[D]. 西安: 长安大学, 2023. [5].张波, 王晓乾, 董彩常, 等. 青岛海洋大气中桥梁结构钢的腐蚀模型对比研究[J]. 公路交通科技, 2013, 30(1):69-73. [6].丁国清, 张波. 钢在自然环境中的大气腐蚀研究进展[J]. 装备环境工程, 2010, 7(3):42-48. [7].王威, 刘杰. 翼板局部腐蚀对钢板梁桥抗弯性能影响研究[J]. 公路, 2022, 67(5):312-316. [8].胡超雄. 考虑耐久性的斜拉桥钢主梁目标可靠指标的合理取值研究[D]. 长沙: 长沙理工大学, 2017. [9].王玉鹏. 海洋环境下正交异性钢桥面板疲劳应力分析[D]. 大连: 大连理工大学, 2017. [10].董长春. 大气腐蚀条件下中等跨径公路钢箱梁桥受力性能评估[D]. 镇江: 江苏科技大学, 2015. [11].朱志伟, 章世祥, 王丹, 等. 典型病害对中小跨径钢箱梁的影响研究[J]. 公路交通技术, 2019, 35(4):87-93. [12].许睿文, 刘鹏, 张鑫敏, 等. 腐蚀对钢箱梁桥面板服役性能的影响[J]. 腐蚀与防护, 2021, 42(12):39-43. [13].JIE Z Y, WANG W Q, ZHUGE P, et al. Fatigue properties of inclined cruciform welded joints with artificial pits[J]. Advanced Steel Construction, 2021, 17(1):20-27. [14].林照远, 杨建喜, 孙宝民. 基于试验的锈蚀桥梁钢构件疲劳评估方法[J]. 结构工程师, 2018, 34(2):129-133. [15].JIANG C, XIONG W, CAI C S, et al. Fatigue assessment of fillet weld in steel bridge towers considering corrosion effects[J]. Engineering Failure Analysis, 2023, 143:106901. [16].CHENG Q, YAO Z A, CHEN H Y, et al. Study on corrosion fatigue degradation performance of welded top plate-U rib of cross-sea steel box girder[J]. Buildings, 2023, 13(7):1784. [17].丁国清, 张波. 几种典型钢在西部大气环境中的腐蚀行为及预测研究[J]. 腐蚀科学与防护技术, 2011, 23(1): 69-74. [18].梁彩凤, 侯文泰. 钢的大气腐蚀预测[J]. 中国腐蚀与防护学报, 2006, 26(3):3129-3135. [19].Albrecht P, Naeemi A H. Performance of weathering steel in bridges[R]. NCHRP, 1984. [20].Hobbacher A F. Recommendations for fatigue design of welded joints and components[M]. 2nd ed. Berlin: Springer, 2016. [21].DNV-RP-C203. Fatigue design of offshore steel structures[S]. [22].胡鹏. 基于热点应力法的正交异性桥面板的疲劳性能研究[D]. 南京: 东南大学, 2015. [23].拉达伊. 焊接结构疲劳强度[M]. 郑朝云, 张式程, 译. 北京: 机械工业出版社, 1994. [24].JTG D64—2015. 公路钢结构桥梁设计规范[S]. [25].徐懋刚. 跨海斜拉桥钢箱梁锈蚀退化分析及预养护[J]. 城市道桥与防洪, 2017(4):130-133. |
| 备注/Memo: | 收稿日期: 2024−06−04. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 浙江省自然科学基金（LY24E080001）; 中国博士后科学基金面上项目（2023M742607）. 第一作者: 揭志羽, 博士/副教授, 主要研究方向: 钢结构和钢-混组合结构桥梁. E-mail: jiezhiyu@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
