A synthesis of peak picking method and wavelet packet transform for structural modal identification

Naderpour, Hosein; Fakharian, Pouyan

doi:10.1007/s12205-016-0523-4

Cited by 37 publications

(11 citation statements)

References 20 publications

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“…To quantitatively estimate the differences between the stress wave responses, the wavelet packet energy technique was employed here to build a monitoring index to evaluate the health condition of the structures [61,62,63,64]. As one of the effective techniques to analyze the transmitted signal between two PZTs, wavelet packet based approach has been widely used in recent years [65,66].…”

Section: Scfrp-based Health Monitoring Techniquementioning

confidence: 99%

Self-Sensing CFRP Fabric for Structural Strengthening and Damage Detection of Reinforced Concrete Structures

Feng

2018

Sensors

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This paper presents a concept of a Self-sensing Carbon Fiber Reinforced Polymer (SCFRP) system, which integrates the piezoceramic transducers with the common concrete strengthening materials, CFRP fabric. This integration provides the SCFRP fabric with the ability to monitor the structural health condition when the SCFRP fabric is applied on reinforced concrete structures. In order to validate the feasibility of this system, several three-point bending beam (3PBB) specimens were fabricated and tested before and after the specimens were reinforced with the proposed SCFRP fabric. In addition, the specimens with the low (C25) and high (C40) concrete grades were also experimentally investigated to evaluate the reinforced effectiveness of the SCFRP fabric. Finally, the experimental results demonstrate that the proposed SCFRP fabric can significantly improve the bearing capacity of the concrete structures, and provided the reinforced concrete structures with an ability of self-sensing their health condition.

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Section: Scfrp-based Health Monitoring Techniquementioning

confidence: 99%

Self-Sensing CFRP Fabric for Structural Strengthening and Damage Detection of Reinforced Concrete Structures

Feng

2018

Sensors

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“…e process of crack detection in civil engineering and mechanical systems structures have gained the attention of majority of the researchers in the last two decades [1][2][3]. Majority of nondestructive methods were used on the basis of the modifications in the properties of dynamic structures for detecting cracks.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Analysis with Wavelet Transform Technique and the Vibration Characteristics for Early Revealing of Cracks in Structures

Abu‐Hamdeh

Daqrouq

Mebarek‐Oudina

2021

Mathematical Problems in Engineering

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Implementation of improved instruments is used to detect damage in an accurate manner and fully analyze its characteristics. An aluminum beam has been used in this work to identify cracks by using a vibration technique. The simulation of frequency response feature was conducted using a finite element model to provide average measures of intensities of vibration. Two forms of wavelet packet transform (WPT) entropies Shannon and log energy were applied to identify the position, width, and size of the crack. The results showed that with an increase in crack depth, the amplitude also increased at certain crack sizes and for all crack positions. For two crack depths of 1.6 mm and 0.16 mm having the same crack size and position 12 mm and 60 mm, respectively, a 4.5% increase in amplitude was observed at a crack depth of 1.6 mm. Moreover, the amplitude varied inversely with the position. A 12.6% increase in amplitude was observed at a crack depth of 1.6 mm rather than 0.16 mm, while both depths occurred at the same crack position (75 mm) and size (20 mm). Experimental validation was performed on a cantilever beam with one crack. The maximum absolute error found was 7.5% for the crack position and 9.1% for the crack size. With the increase in crack depth, the obtained results decrease the stiffness of a beam in a single crack case.

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“…Among the functions of using this technique in buildings, one can mention the prediction of the structure condition, determination the amount of failure, remaining life of the structure, and identifying the health parameters of the structure [1]. Unfortunately, it is impossible to utilize either the experimental (empirical) modal or classical analysis (EMA) 1 method in the large civil engineering structures.…”

Section: Introductionmentioning

confidence: 99%

“…It should be mentioned that the input-output methods contain some advantages of preventing the effects of noise on the structure response, in which only output methods do not have this advantage. However, the input/output solutions are more costly than the output solutions, and they usually interfere with the operation of the 1 Experimental Modal Analysis 2 operational modal analysis structure during the test. The output solutions can provide the ability to un-interruption and continuously monitoring the health of the structure because it can measure the response of the structure under the operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Developing a Feature Extraction of Existing Structures Using an Ambient Vibration Test

Sarmast¹,

Kazemi²

2020

Preprint

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The paper aims to extract the dynamic properties of existing structures without utilizing the analytical models. The ambient vibration testing could be used on any type of frame such as concrete, steel and masonry to investigate the structural vulnerability. The method could be the first stage and necessarily for the retrofit process. To achieve this aim, the ambient vibration testing can also be employed. The experimental data obtained from the method can be used to monitor the health, evaluating, and damage detection structures at present. The achieved data can be compared in future with the recorded signals at different times. So, the ambient vibration test was carried out on the building of Imam Hossein Hospital at Mashhad. Then, its dynamic characteristics of the acceleration records are obtained by using Data Acquisition System with three accelerometers in two perpendicular coordinates. The method is more accurate and practical compare with analytical models of the existing buildings. The ambient vibration test prevents of several points such as destructive testing or may irreparable damage to the building as well as high cost. Even, the ambient vibration test maybe required for every couple of decayed, when noticed of any changes in the condition of buildings after construction. These type of changes could be quality of concrete or welding or some changes in the location of walls that can be affected the dynamic specifications of the building. The method provides real lateral load pattern and actual modes that can evaluate existing condition of the building compare with the time of construction.

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A synthesis of peak picking method and wavelet packet transform for structural modal identification

Cited by 37 publications

References 20 publications

Self-Sensing CFRP Fabric for Structural Strengthening and Damage Detection of Reinforced Concrete Structures

Self-Sensing CFRP Fabric for Structural Strengthening and Damage Detection of Reinforced Concrete Structures

Simulation and Analysis with Wavelet Transform Technique and the Vibration Characteristics for Early Revealing of Cracks in Structures

Developing a Feature Extraction of Existing Structures Using an Ambient Vibration Test

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