Interaction and multiscale mechanics

  • 제3권4호
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  • Pages.321-331
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  • 2010
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  • 1976-0426(pISSN)
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  • 2092-6200(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Identification of beam crack using the dynamic response of a moving spring-mass unit

  • An, Ning (School of Civil Engineering, Beijing Jiaotong University) ;
  • Xia, He (School of Civil Engineering, Beijing Jiaotong University) ;
  • Zhan, Jiawang (School of Civil Engineering, Beijing Jiaotong University)
  • 투고 : 2010.07.26
  • 심사 : 2010.10.22
  • 발행 : 2010.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

A new technique is proposed for bridge structural damage detection based on spatial wavelet analysis of the time history obtained from vehicle body moving over the bridge, which is different from traditional detection techniques based on the bridge response. A simply-supported Bernoulli-Euler beam subjected to a moving spring-mass unit is established, with the crack in the beam simulated by modeling the cracked section as a rotational spring connecting two undamaged beam segments, and the equations of motion for the system is derived. By using the transfer matrix method, the natural frequencies and mode shapes of the cracked beam are determined. The responses of the beam and the moving spring-mass unit are obtained by modal decomposition theory. The continuous wavelet transform is calculated on the displacement time histories of the sprung-mass. The case study result shows that the damage location can be accurately determined and the method is effective.

키워드

참고문헌

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피인용 문헌

  1. Bridge Damage Identification from Moving Load Induced Deflection Based on Wavelet Transform and Lipschitz Exponent vol.16, pp.05, 2016, https://doi.org/10.1142/S0219455415500030
  2. A two-step approach for crack identification in beam vol.332, pp.2, 2013, https://doi.org/10.1016/j.jsv.2012.08.025
  3. Analysis and identification of multiple-cracked beam subjected to moving harmonic load 2018, https://doi.org/10.1177/1077546317694496
  4. Damage Identification in Bridges by Processing Dynamic Responses to Moving Loads: Features and Evaluation vol.19, pp.3, 2019, https://doi.org/10.3390/s19030463
  5. Time-frequency analysis of a coupled bridge-vehicle system with breathing cracks vol.5, pp.3, 2012, https://doi.org/10.12989/imm.2012.5.3.169
  6. Numerical Parametric Study on the Effectiveness of the Contact-Point Response of a Stationary Vehicle for Bridge Health Monitoring vol.11, pp.15, 2010, https://doi.org/10.3390/app11157028