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[1] Shi Linze, Cheng Bin, , et al. Analysis of Lamb wave monitoring of fatigue cracks at floor beam cutout of orthotropic steel bridge decks [J]. Journal of Southeast University (English Edition), 2024, 40 (1): 24-32. [doi:10.3969/j.issn.1003-7985.2024.01.003]
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Analysis of Lamb wave monitoring of fatigue cracks at floor beam cutout of orthotropic steel bridge decks()
正交异性钢桥面板横梁切口裂纹的Lamb波监测分析
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
40
Issue:
2024 1
Page:
24-32
Research Field:
Traffic and Transportation Engineering
Publishing date:
2024-03-20

Info

Title:
Analysis of Lamb wave monitoring of fatigue cracks at floor beam cutout of orthotropic steel bridge decks
正交异性钢桥面板横梁切口裂纹的Lamb波监测分析
Author(s):
Shi Linze1 Cheng Bin1 2 3 Xiang Sheng1 Zhao Qibin4
1School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
3Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai Jiao Tong University, Shanghai 200240, China
4 RIKEN Center for Advanced Intelligence Project, Saitama 351-0198, Japan
石林泽1 程斌1 2 3 向升1 赵启斌4
1上海交通大学船舶海洋与建筑工程学院, 上海 200240; 2上海交通大学海洋工程国家重点实验室, 上海 200240; 3上海交通大学上海市公共建筑和基础设施数字化运维重点实验室, 上海 200240; 4 RIKEN Center for Advanced Intelligence Project, Saitama 351-0198, Japan
Keywords:
orthotropic steel bridge decks floor beam cutout fatigue cracks Lamb wave monitoring sensor arrangements
正交异性钢桥面板 横梁切口 疲劳裂纹 Lamb波监测 传感器布置
PACS:
U443.3
DOI:
10.3969/j.issn.1003-7985.2024.01.003
Abstract:
To investigate the performance of Lamb wave monitoring of fatigue cracks at the floor beam cutout of orthotropic steel bridge decks, two full-scale specimens were produced and subjected to cyclic loading. The cutout cracks initiated during the tests were continuously monitored by Lamb wave sensors. Crack growth was estimated based on standardized wave features extracted from the received waves. Finite element models with typical regions were also established and validated by the experimental results. Parametric studies were conducted to determine the optimal sensor arrangements for monitoring cutout cracks, considering various parameters, such as crack lengths and sensor locations. The experimental results indicate that the standardized wave features increase when cracks and wave propagation paths are perpendicular, whereas the standardized wave features decrease when cracks and wave propagation paths are parallel. The parametric results reveal the optimal sensor arrangements for crack monitoring in the floor beam cutout regions, i.e., prearranging one excitation sensor and four reception sensors within the span of a typical floor beam cutout region. The excitation sensor should be placed at a distance of 50 mm from the cutout, whereas the reception sensors should be arranged at a distance of 50 mm from the cutout or 50 to 100 mm from the deck plate.
为探究钢桥面板横梁切口裂纹的Lamb波技术监测效果, 设计了2个钢桥面板足尺模型, 通过循环加载使其横梁切口处发生疲劳开裂, 利用Lamb波监测裂纹扩展情况, 进而从波信号中提取标准化特征, 用于评估裂纹扩展.建立并验证了钢桥面板有限元模型, 进行了裂纹长度、传感器位置等各种参数分析, 以确定最佳传感器布置.试验结果表明:当裂纹扩展长度与波传播路径垂直时, 标准化特征增大;当两者路径平行时, 标准化特征减小.参数化分析结果确定了切口处裂纹监测的最佳传感器位置, 建议在选定横梁切口区域, 预先布置1个激励器和4个接收器, 激励器位于距切口50 mm处, 接收器位于距离切口50 mm处或距顶板50~100 mm处.

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Memo

Memo:
Biographies: Shi Linze(1996—), male, Ph. D. candidate; Cheng Bin(corresponding author), male, doctor, professor, cheng_bin@sjtu.edu.cn.
Foundation items: National Key R& D Program of China(No.2021YFE0107800), National Science Foundation for Distinguished Young Scholars(No.52325805), CCCC Academician Special Scientific Research Funding Project(No.YSZX-03-2021-01-B).
Citation: Shi Linze, Cheng Bin, Xiang Sheng, et al. Analysis of Lamb wave monitoring of fatigue cracks at floor beam cutout of orthotropic steel bridge decks[J].Journal of Southeast University(English Edition), 2024, 40(1):24-32.DOI:10.3969/j.issn.1003-7985.2024.01.003.
Last Update: 2024-03-20