Health-Monitoring Method for Bridges Under Ordinary Traffic Loadings

Jw, Lee; Kim, JD; Yun, Chung Bang; Yi, Jin‐Hak; Shim, Jongmin

doi:10.1006/jsvi.2002.5056

Cited by 116 publications

(67 citation statements)

References 7 publications

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“…To safeguard the stability of ancient bridges, regular inspection and analysis are essential. At present, dynamic testing under ambient excitation (usually due to traffic or wind) is the main experimental method used to acquire the dynamic responses of bridges in service, which is an approach that has attracted significant research attention [2,3]. Most of the typical experimental tests have been carried out using piezoelectric accelerometers and fiber optic Zhaozhou Bridge.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Monitoring and Vibration Analysis of Ancient Bridges by Ground-Based Microwave Interferometry and the ESMD Method

Liu

Yang

et al. 2018

Remote Sensing

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Abstract:In this paper, we propose to conduct a dynamic monitoring and vibration analysis of ancient bridges by means of ground-based microwave interferometry and the extreme-point symmetric mode decomposition (ESMD) method. Ground-based microwave interferometry, a novel non-contact technology with a high accuracy, is used to acquire dynamic time series displacements with environmental excitation factors and a transient load with a car, respectively. The ESMD method, a new alternative to the Hilbert-Huang transform (HHT), is adopted to conduct the instantaneous vibration analysis of Zhaozhou Bridge. Firstly, a series of intrinsic mode functions (IMFs) are obtained together with an optimal adaptive global mean (AGM) curve by using a mode symmetric about the maxima and minima points. Secondly, the instantaneous frequency of each IMF is obtained by the use of a direct interpolation algorithm, which can reconcile the conflict between the period and the frequency for the traditional time-frequency analysis methods. As a representative case, Zhaozhou Bridge, a well-known Chinese ancient bridge constructed more than 1400 years ago, is studied in detail. Four kinds of dynamic time series displacements-two of them acquired by considering only environmental excitation factors for the mid-span and 1/4-span points and the others obtained with the transient load of a car for the mid-span and 1/4-span points-are selected to pursue a comparison of the decomposed IMFs and the instantaneous frequencies to perform the instantaneous vibration analysis of Zhaozhou Bridge. By comparing the results obtained with HHT for the decomposed IMFs and the instantaneous frequencies, the results show that the proposed method has a powerful ability to evaluate the instantaneous dynamic response of ancient bridges.

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Section: Introductionmentioning

confidence: 99%

Dynamic Monitoring and Vibration Analysis of Ancient Bridges by Ground-Based Microwave Interferometry and the ESMD Method

Liu

Yang

et al. 2018

Remote Sensing

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“…Typical experimental tests are usually carried out using accelerometers, strain, inductive and wireless sensors [1][2][3]. Most of these sensors require direct contact to the structure for installation.…”

Section: Introductionmentioning

confidence: 99%

Application of Interferometry Method for Dynamic Continuous Testing of Bridges

Bęben

2016

Period. Polytech. Civil Eng.

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“…The first use of the ambient vibration technique for the dynamic characterization of full-scale structures is reported in the seventies. Since then the technique is extensively used in engineering in the scope of parameter identification (frequencies, damping ratios and modal shapes) [27,41,40,17,6,44,22], model updating [26,22] as well as damage detection and health monitoring [20,42,33] of slender structures such as pedestrian bridges, chimneys, long-span frame structures or high-rise buildings.…”

Section: Introductionmentioning

confidence: 99%

Treatment of arbitrarily autocorrelated load functions in the scope of parameter identification

Runtemund

Cottone

Müller

2013

Computers & Structures

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Ambient vibration tests are output-only tests based on the structural response recorded under natural excitation, such as wind or traffic loads. In contrast to forced vibration test, they do not require service interruption and expensive devices to excite the structure. To this aim, we combine the recently proposed H-fractional spectral moments representation of stationary processes with a modification of the Kalman filter to the scope of structural parameter identification. This paper shows that the method is particularly suited to dealing with longcorrelated loads, i.e. stochastic processes with inverse power-law correlation, where many existing methods are not applicable or insufficiently accurate.

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Health-Monitoring Method for Bridges Under Ordinary Traffic Loadings

Cited by 116 publications

References 7 publications

Dynamic Monitoring and Vibration Analysis of Ancient Bridges by Ground-Based Microwave Interferometry and the ESMD Method

Dynamic Monitoring and Vibration Analysis of Ancient Bridges by Ground-Based Microwave Interferometry and the ESMD Method

Application of Interferometry Method for Dynamic Continuous Testing of Bridges

Treatment of arbitrarily autocorrelated load functions in the scope of parameter identification

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