[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()

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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

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

Keywords:

orthotropic steel bridge decks;  floor beam cutout;  fatigue cracks;  Lamb wave monitoring;  sensor arrangements

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.

References:

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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.

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