The Quality Assessment of Timber Structural Joints Using the Coaxial Correlation Method
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Published:2023-07-28
Issue:8
Volume:13
Page:1929
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ISSN:2075-5309
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Container-title:Buildings
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language:en
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Short-container-title:Buildings
Author:
Kurtenoks Viktors1, Kurajevs Aleksis1, Buka-Vaivade Karina1ORCID, Serdjuks Dmitrijs1ORCID, Lapkovskis Vjaceslavs1ORCID, Mironovs Viktors2, Podkoritovs Andrejs1, Vilnitis Martins2
Affiliation:
1. Institute of Structural Engineering, Riga Technical University, LV-1048 Riga, Latvia 2. Institute of Construction Technology, Riga Technical University, LV-1048 Riga, Latvia
Abstract
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.
Funder
Latvian Council of Science’s funded project “Method of Correlation of Coaxial Accelerations in 6D Space for Quality Assessment of Structural Joints (COACCEL)”
Subject
Building and Construction,Civil and Structural Engineering,Architecture
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