Damage detection of framed structures subjected to earthquake excitation using discrete wavelet analysis

Pnevmatikos, Nikos; Hatzigeorgiou, George D.

doi:10.1007/s10518-016-9962-z

Cited by 64 publications

(34 citation statements)

References 25 publications

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“…The probability that the process will assume one of the states i in the subsequent time period k can be calculated using Equation (3). For instance, when predicting the condition of the wings at the age t = 38 years for the subsequent period k of 20 years, the n-dimensional vector expressed in Equation (…”

Section: Condition Predictionmentioning

confidence: 99%

“…The main goal of the BMS is to establish an optimal operation strategy as a compromise between technical and social factors, such as maximization of network performance, minimization of life-cycle costs, and minimization of the probability of failure [2]. To establish such a strategy, it is essential to comprehend the long-term performance of a bridge, taking into account possible deterioration [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Condition Prediction of Existing Concrete Bridges as a Combination of Visual Inspection and Analytical Models of Deterioration

et al. 2019

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In most state-of-the-art Bridge Management Systems, structural condition is predicted by a homogeneous Markov chain model that uses condition ratings assigned during visual inspections. Although generally accepted, such an approach exhibits certain shortcomings, one of which is not considering the nature of actual physical phenomena that cause deterioration. To overcome this shortcoming, this article presents a framework that combines both information on condition ratings through the semi-Markov process and knowledge of bridge properties using analytical deterioration models. In this manner, and contrary to current practice, not only are the results of visual inspection taken into account, but also information such as environmental loading, as well as material and structural properties. The presented framework was implemented in the case study bridge, in which the deterioration caused by carbonation-induced corrosion was studied. Along with the implementation in the case study, the article contained a detailed overview of the subject of carbonation-induced corrosion and emphasized issues that require additional research in order to develop the framework into a comprehensive and fully applicable tool for condition prediction. Accounting for its adaptability to other material types and deterioration processes and its consideration of the historic deterioration path, the framework presents a suitable alternative to frameworks presently implemented for condition prediction.

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Section: Condition Predictionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Condition Prediction of Existing Concrete Bridges as a Combination of Visual Inspection and Analytical Models of Deterioration

et al. 2019

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“…Response spectrum analysis does not provide realistic seismic analysis in structures with damage progression, hysteretic deterioration, inelastic response, second-order effect, and other significant nonlinear behaviors. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] For these cases, the structural design can be enhanced with the use of accelerograms for the time history analysis. Real accelerograms have irregular response spectrums and are not directly related to the code defines design spectra.…”

Section: Introductionmentioning

confidence: 99%

An artificial accelerogram generator code written in Matlab

Ferreira

Moutinho

Cunha

et al. 2020

Engineering Reports

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Artificial accelerograms are a very useful tool for designing structures against seismic hazards; in particular, when structures exhibit nonlinear behavior. This paper presents a Matlab code for generating artificial accelerograms to match code‐defined spectra based on the modification of actual earthquake ground motions. In this case, while the code is written to generate Eurocode 8‐compatible accelerograms, it can be easily adapted to any other code in the world. The proposed code determines the earthquake spectra and Fourier Transform using the Fast Fourier Transform algorithm and then modifies the Fourier Transform in order to match the predefined spectra. The code also includes instructions for outlining different actual ground motions, soil, and earthquake type. The code is geared to students and researchers in the field of Structural and Earthquake Engineering. The objective of this work is to provide a Matlab code that can be integrated in other research programs such as seismic structural analysis, structural control software, or other codes.

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“…Lima et al [35], use wavelet analysis for damage detection of non-linear structures. Damage detection of frame structures subjected to earthquake excitation using discrete and continues wavelet analysis is presented in the works of Pnevmatikos et al ([36], [37]).…”

Section: Introductionmentioning

confidence: 99%

Damage Detection of Mixed Concrete/Steel Frame Subjected to Earthquake Excitation

Pnevmatikos

Błachowski²,

Papavasileiou

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This paper deals with the application of wavelet analysis on damage detection in mixed concrete/steel frame structures subjected to earthquake excitation. Such buildings are typically the result of a building initially constructed as a reinforced concrete building and, at a later time, more storeys were added as steel moment resisting frames. These structures consist of reinforced concrete frames at the lower storeys and steel frames at the upper storeys. They are characterized by the material inconsistency in height. The proposed method of wavelet analysis of structural response is an output-only damage detection method. Non-linear dynamic analysis has been performed and response data at each story are obtained which are used as simulation data. Damage in the frame is due to hysteretic behaviour of columns and beams. Since the dynamic behaviour of an inelastic structure subjected to an earthquake excitation is a nonstationary process, discrete and continuous wavelet analysis were performed in order to retrieve the simulation response data. The proposed method is based on the assumption that there is a correlation between structural damage, due to non-linear behaviour of structural elements and spikes that can be clearly detected in the wavelet details. This is supported by the fact that at the time when the spikes are recorded, structural damage occurs as well. The numerical results indicate that the discrete wavelet analysis is a promising method for the detection of damage in structures without the need for visual inspection

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Damage detection of framed structures subjected to earthquake excitation using discrete wavelet analysis

Cited by 64 publications

References 25 publications

Condition Prediction of Existing Concrete Bridges as a Combination of Visual Inspection and Analytical Models of Deterioration

Condition Prediction of Existing Concrete Bridges as a Combination of Visual Inspection and Analytical Models of Deterioration

An artificial accelerogram generator code written in Matlab

Damage Detection of Mixed Concrete/Steel Frame Subjected to Earthquake Excitation

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