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 (10): 1-7.DOI: 10.3969/j.issn.1674-0696.2018.10.01

• 桥梁与隧道工程 •    下一篇

基于损伤性能函数的桥梁结构损伤识别

陈东军1, 3,李天华2,彭 凯1,张可佳2,林洁琼1,白文英2   

  1. (1. 重庆交通大学 土木工程学院,重庆 400074; 2. 新疆城建试验检测有限公司,新疆 乌鲁木齐 830000; 3. 中建新疆建工路桥工程有限公司,新疆 乌鲁木齐 830054)
  • 收稿日期:2017-07-10 修回日期:2018-05-29 出版日期:2018-10-08 发布日期:2018-10-08
  • 作者简介:陈东军(1972—),男,新疆乌鲁木齐人,高级工程师,博士生,主要从事桥梁可靠度评估、装配式结构应用等方面的研究。E-mail:2212114508@qq.com。 通信作者:彭凯(1974—),男,重庆人,副教授,主要从事桥梁动力监控等方面的研究。E-mail:921410572@qq.com。
  • 基金资助:
    乌鲁木齐市科学技术计划项目(Y141310007)

Bridge Structure Damage Identification Based on the Damage Performance Function

CHEN Dongjun1, 3, LI Tianhua2, PENG Kai3, ZHANG Kejia2, LIN Jieqiong3, BAI Wenying2   

  1. (1.School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, P. R. China; 2. Xinjiang Urban Construction Testing Co., Ltd., Urumchi 830000, Xinjiang, P. R. China; 3. Highway & Bridge Engineering Co., Ltd., CSCEC Xinjiang Construction & Engineering (Group)Co., Ltd., Urumchi 830054, Xinjiang, P. R. China)
  • Received:2017-07-10 Revised:2018-05-29 Online:2018-10-08 Published:2018-10-08

摘要: 以梁板桥为研究对象,分别建立完好和带裂缝板的有限元模型,计算出随机行车激励的多种移动载荷工况下控制点的加速度时程响应。对加速度时程进行时域内微元分段,开展频谱分析得到频谱图,形成以概率统计算法处理具有不确定性的损伤识别问题的方法。基于板损伤后固有频率降低的概率意义和各个工况下指征频率的统计特征,构建板损伤识别的性能函数。用损伤性能函数表达结构损伤状态,计算不同结构损伤状态的概率。计算结果与结构开裂及裂纹延伸发展趋势一致。

关键词: 桥梁工程, 板梁桥, 行车激励, 指征频率, 性能函数, 损伤识别

Abstract: Taking slab bridge as the research object, the finite element models of intact and cracked slabs were established respectively. With various live loads of random running vehicle excitations, the acceleration time-history responses at the measuring points were calculated, and the acceleration time-history was piecewise in the time domain, and spectrum analysis was carried out to get the spectrum. A probabilistic statistical algorithm was developed to deal with the problem of uncertain damage identification. Based on the probabilistic significance of the reduction of the natural frequency after plate damage and the statistical characteristics of the indication frequency under various working conditions, the performance function of plate damage identification was established. The structural damage state was expressed by the damage performance function, and the probability of different structural damage states was calculated. The calculated results agree well with the development trend of structural cracking and crack extension.

Key words: bridge engineering, slab bridge, running vehicle excitation, indication frequency, performance function, damage identification

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