Abstract
Sensing, gaging and locating the structural damage inside the wooden wall structure using vibration response is a proven technology and many research articles are published in this thematic area. The damage detection is usually carried out by monitoring and assessing damage-sensitive parameters such as resonant frequencies and operating deflection shapes. However, in this article we propose a novel methodology based on FRF curvature and transmissibility based on the vibration response data as a quantitative parameter to detect and locate damage inside a wall structure. Mock damage was created in one of the structural wooden partition wall of a specially built room and its vibration response was measured. Damage-sensitive factors were taken out from the frequency response data and applied for gaging the damage quantitatively. For locating the damage region, quantitative parameters method, i.e. broadband FRF curvature and transmissibility methods were utilized. These techniques if commercialized, can save billions of dollars in pest control.
Highlights
It is estimated that termites cause damage to trees, plants, homes worth US $50 billion worldwide per year
The aim of paper is to contribute to the development of a simple technique for assessing the internal structural damage for the planned maintenance of the buildings
A number of vibration based techniques have been extensively used for assessing the internal structural damage that is not visually apparent
Summary
It is estimated that termites cause damage to trees, plants, homes worth US $50 billion worldwide per year. There is not much work published on termite damage assessment techniques. The aim of paper is to contribute to the development of a simple technique for assessing the internal structural damage for the planned maintenance of the buildings. Vibration techniques can be a low cost, fast and reliable method for assessing damage and have cost saving viability. A number of vibration based techniques have been extensively used for assessing the internal structural damage that is not visually apparent. An overview of vibration based techniques can be found in [1,2,3] where detection of the existence of damage is done, by comparing and monitoring resonant frequency shifts using modal data or by monitoring the changes operating deflection shapes. Frequency and curvature based experimental method can be highly sensitive for locating even small amount of damage by experimentally comparing the ISSN PRINT 2345-0533, ISSN ONLINE 2538-8479, KAUNAS, LITHUANIA
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