Modelling the degradation of vibration characteristics of reinforced concrete beams due to flexural damage

Hamad, Waleed; Owen, J.S.; Hussein, M.F.M.

doi:10.1002/stc.1726

Cited by 33 publications

(19 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As this study initiated based on the experimental data from recent research [19] and the computational analysis based on the authors' work [21]. The beam specimen was kept less slender to observe the contribution of shear behavior, and also because the proposed methodology is capable of translating shear behavior along with the flexural behavior.…”

Section: Beam Detailsmentioning

confidence: 99%

“…Various techniques have been used, various methods have been incorporated to identify the damage in reinforced concrete beams. The recently applied technique makes use of introducing the incremental static damage and then utilizing the vibrations to identify the current condition of the structure [19]. This gives the global response of the structure at the known extent of the damage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of incremental static damage on modal frequencies of reinforced concrete beams

Ibrahim

Hanif²,

Lim³

et al. 2018

IJIE

View full text Add to dashboard Cite

show abstract

Section: Beam Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of incremental static damage on modal frequencies of reinforced concrete beams

Ibrahim

Hanif²,

Lim³

et al. 2018

IJIE

View full text Add to dashboard Cite

show abstract

“…Several advantages and limitations of these methods were also pointed out. Many studies confirm that mode shapes and corresponding mode shape curvatures are highly sensitive to damage and can be used for detection and quantification of the damage. Maia et al in performed extensive numerical simulations on a beam structure to compare damage identification sensitivity within different methods, based on the changes of mode shape, mode shape slope, mode shape curvature and mode shape curvature square, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The authors concluded that it was hard to make a general conclusion on whether these damage indicators are effectively applicable to all composite structures because the results are highly dependent on the number of measured degrees of freedom and modes. Hammad et al proposed to treat the undamaged zones of the beam as linear elastic, whereas the zones containing multiple cracks are assigned a nonlinear behaviour, thus improving an existing crack model. Results showed that sensitivity of changes in vibration characteristics was proportional to stiffness of a beam support; however, as damage severity increased, the respective change of nonlinearity did not follow the monotonic trend; therefore, it cannot be used for damage detection.…”

Section: Introductionmentioning

confidence: 99%

Mode shape-based damage detection in plate structure without baseline data

Ručevskis

Janeliukštis

Akishin

et al. 2016

Struct. Control Health Monit.

View full text Add to dashboard Cite

In this paper, a mode shape curvature-based method for detection and localization of damage in plate-like structures is described. The proposed algorithm requires only the mode shape curvature data of the damaged structure. The damage index is defined as the absolute difference between the measured curvature of the damaged structure and the smoothed polynomial representing the curvature of the healthy structure. To examine the advantages and limitations of the proposed method, several sets of numerical simulations are carried out. Simulated test cases considering different levels of damage severity, measurement noise and sensor sparsity are studied to evaluate the robustness of the method under the noisy experimental data and limited sensor data. Applicability and effectiveness of the proposed damage detection method are further demonstrated experimentally on an aluminium plate containing mill-cut damage. The modal frequencies and the corresponding mode shapes are obtained via finite element models for numerical simulations and by using a scanning laser vibrometer for the experimental study. Copyright

show abstract

“…On the other hand, monitoring the higher harmonics in concrete structures is not common in practice. It is previously demonstrated that the variations in the higher harmonics of excitation force due to the damage in concrete elements can be used for the purpose of crack detection . However, in order to quantify the damage content, measurable diagnostic features are required, which can be obtained by utilizing the HOS technique.…”

Section: Introductionmentioning

confidence: 99%

Novel vibration structural health monitoring technology for deep foundation piles by non‐stationary higher order frequency response function

Gelman

Kırlangıç

2020

Struct Control Health Monit

View full text Add to dashboard Cite

Summary Damage in the precast concrete piles occurs mostly during installation. The wave propagation‐based nondestructive testing (NDT) is commonly used to estimate the effective length of the pile after installation and to detect pile damage. However, information extracted from this type of diagnosis is limited and subjective. Whereas, the vibration‐based NDT could provide a comprehensive automatic pile health diagnosis tool. In this paper, a new higher order vibration‐based health diagnosis technology, which utilizes a shaker to generate sweep‐sine excitation and an adaptive nonlinear non‐stationary higher order spectral analysis, is introduced for foundation piles. This research describes two different diagnostic technologies, namely, the advanced nonlinear non‐stationary chirp Fourier bicoherence (CFB) technology and the novel nonlinear non‐stationary frequency response function of the CFB (FRF‐CFB) technology. The CFB is a technology which is capable of quantifying the amplitude and phase coupling between harmonics of pile resonance oscillations caused by a damage. However, in practices, the amplitude and phase coupling between harmonics of pile resonance oscillations may be caused also due to the phase‐coupled harmonics of an interference imposed by an excitation source (e.g., shaker). Therefore, the novel diagnosis technology, FRF‐CFB, which detects nonlinearity caused solely by a structural damage, is proposed and implemented for real‐scale precast concrete piles. It is found that the FRF‐CFB technology successfully identifies the damaged piles. Finally, the diagnosis based on the conventional pile integrity testing, conducted on the same piles, is presented for comparisons with the FRF‐CFB technology and with the CFB technology.

show abstract

Modelling the degradation of vibration characteristics of reinforced concrete beams due to flexural damage

Cited by 33 publications

References 31 publications

Effect of incremental static damage on modal frequencies of reinforced concrete beams

Effect of incremental static damage on modal frequencies of reinforced concrete beams

Mode shape-based damage detection in plate structure without baseline data

Novel vibration structural health monitoring technology for deep foundation piles by non‐stationary higher order frequency response function

Contact Info

Product

Resources

About