Non-model vibration analysis method for health monitoring of structural joints

Serdjuks, Dmitrijs; Kurtenoks, Viktors; Tatarinovs, Aleksejs; Buka-Vaivade, Karina; Lapkovskis, Vjačeslavs; Mironovs, Viktors; Podkoritovs, Andrejs; Topcijs, Kirils

doi:10.1016/j.prostr.2022.01.122

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Figure 6 shows a significant difference in the power of the collected response signals from both accelerometers A1 and A2, indicating On the one hand, the dependence between the proposed parameter RMS vol and joint stiffness is obtained. On the other hand, it is the opposite compared to the direct relationships obtained in the previous research [31][32][33]. The physic-mechanical clarification of the increased RMS vol with the degradation of the joint stiffness can be explained with the configuration and type of the investigated joint.…”

Section: Resultsmentioning

confidence: 55%

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The Quality Assessment of Timber Structural Joints Using the Coaxial Correlation Method

Kurtenoks,

Kurajevs,

Buka-Vaivade

et al. 2023

Buildings

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With the growing popularity of timber structures, the requirement for reliable and non-destructive methods to assess the quality and condition of structural joints becomes increasingly essential. A novel coaxial correlations method is investigated to assess the degradation of panel-to-panel moment joints in timber structures. The method involves analysing the response data obtained from accelerometers placed on both sides of the joint and comparing the readings to evaluate the joint’s condition. A specific joint solution to simulate the degradation of the moment joint in laboratory conditions is selected based on its simplicity and the ease with which its degradation can be simulated. The joint consists of angle brackets joined with timber screws and bolts to plywood panels. Gradually unscrewing the timber screws reduces the joint’s stiffness to simulate wear and tear over time. The experimental setup includes static loading and finite element modelling (FEM) to determine the rotational stiffness of the investigated joint at each degradation level. A dynamic experiment using vibration loading with sweep signal in the frequency range of 10 Hz to 2000 Hz is conducted to assess the quality of the joint. The conducted research provides valuable insights into the behaviour of timber panel-to-panel connections. The findings highlight the relationship between joint stiffness, vertical displacements, and the proposed dimensionless parameter, volume root mean square value (RMSvol), which offers a more comprehensive assessment of the joint’s condition in three spatial directions. As a result of the research, it has been established that, in the case of linear-type connections, unlike point-type joints, there is a possibility of signal scattering, so it is recommended that power comparisons and evaluations of the response signals from both accelerometers at the initial stage of applying the coaxial correlations method are performed.

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Section: Resultsmentioning

confidence: 55%

“…The evaluation method proposed for assessing the degradation of structural joints has demonstrated promising results, particularly in the case of two beams joining at right angles both for timber and steel structures [31,32] and steel beam slip connections [33].…”

Section: Coaxial Correlation Methods For Structural Joint Quality Eva...mentioning

confidence: 99%

The Quality Assessment of Timber Structural Joints Using the Coaxial Correlation Method

Kurtenoks,

Kurajevs,

Buka-Vaivade

et al. 2023

Buildings

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“…Vibration analysis methods make it possible to determine damages to structures or structural joints due to changes in the frequency response, modal shape and damping. Non-model vibration analysis method for health monitoring of structural joints was proposed and experimentally tested using the steel and timber beam stands described in previous papers [6,7].…”

Section: Introductionmentioning

confidence: 99%

Method and apparatus for dynamic testing of structural joints

Mironovs

Zemčenkovs

Serdjuks

et al. 2023

J. Phys.: Conf. Ser.

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The dynamic testing technique is used during the design phase of structures and series production. This test evaluates the structural capacity, especially of the assemblies, to withstand different forces and rates of impact encountered under realistic operational conditions. This study proposes a magnetic pulse exciter for high-speed impact loading in dynamic tests because of its capability to provide single and repeatable pulse loading over a wide range of force up to 20 kN and pulse durations from 10 up to 1000 ms. The method transforms accumulated electrical energy in a capacitor bank into mechanical energy. For experimental investigations, flat and cylindrical coil devices were used for a capacitor-type pulse current generator. The proposed method has been experimentally validated on timber beams in a specified volume of force loading. The technique demonstrated a potential for controlling force and energy parameters. The effects of operating voltage on coil and ‘metal plate - coil’ distance on the amplitude of dynamic loading have been investigated. Aluminium and steel plates fastened to the object at the point of impact were used to improve excitation efficiency. The developed technique can be used in experimental studies on model joints and real objects.

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