中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2018, Vol. 37 ›› Issue (08): 1-5.DOI: 10.3969/j.issn.1674-0696.2018.08.01

• 桥梁与隧道工程 •    下一篇

泰州大桥钢箱梁疲劳损伤评估及试验研究

吉林1,孔祥明2,蒋波1,袁周致远2   

  1. (1. 江苏泰州大桥有限公司,江苏 泰州 225321;2. 河海大学 土木与交通学院,江苏 南京 210098)
  • 收稿日期:2017-02-05 修回日期:2017-10-12 出版日期:2018-08-21 发布日期:2018-08-21
  • 作者简介:吉林(1962—),男,江苏南通人,研究员级高工,博士,主要从事桥梁工程方面的研究。E-mail: 1244761080@qq.com。
  • 基金资助:
    国家自然科学基金项目(51478163);江苏省交通科学研究计划项目(2014Y02)

Fatigue Damage Assessment and Experimental Study on Steel Box Girder of Taizhou Yangtze River Bridge

JI Lin1,KONG Xiangming2,JIANG Bo1,YUANZHOU Zhiyuan2   

  1. (1. Jiangsu Taizhou Bridge Co. Ltd., Taizhou 225321, Jiangsu, P. R. China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, Jiangsu, P. R. China)
  • Received:2017-02-05 Revised:2017-10-12 Online:2018-08-21 Published:2018-08-21

摘要: 通过三维仿真模型进行泰州大桥全桥动力响应分析,确定主梁最不利疲劳损伤截面。针对最不利截面的顶板与U肋连接细节进行疲劳应力测试,分析其疲劳损伤特征,并开展疲劳试验,采用名义应力法评价该细节疲劳强度。研究表明:泰州大桥钢箱梁跨中截面为疲劳损伤不利截面。在目前的交通流量下,跨中截面顶板与U肋焊缝处顶板测点的最大应力幅值远低于BS5400规范推荐的疲劳极限值。泰州大桥顶板与U肋构造细节的疲劳强度满足规范的规定要求。

关键词: 桥梁工程, 钢箱梁, 顶板与U肋, 疲劳截面, 应变时程, 疲劳强度

Abstract: The 3D simulation model was established for the analysis of dynamic response of Taizhou Yangtze River Bridge to determine the most unfavorable fatigue damage section. The fatigue stress test was conducted on the deck and U-rib joint weld of the most unfavorable section, and the fatigue damage characteristics were analyzed. In addition, the fatigue test was carried out and the fatigue strength of the detail was evaluated by the nominal stress method. The results show that the most unfavorable section of Taizhou Yangtze Bridge lies in the mid-span of the steel box girder. Under the current traffic volume, the maximum stress amplitude of the measuring points of deck and U-rib weld in the mid-span section is much lower than the fatigue threshold recommended by the BS5400 standard. The fatigue strength of deck and U-rib weld of Taizhou Yangtze River Bridge conforms to the specifications.

Key words: bridge engineering, steel box girder, deck and U-rib, fatigue section, strain time history, fatigue strength

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