Structural health monitoring of layered structure by strain measurements

Structural health monitoring (SHM) of building structures is a very important technology in the effort to realize a sustainable society. Various studies on SHM have been carried out, and it is effective because it avoids accidents and predicts behaviour of structures. In this study, we proposed a me...

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Autores principales:	Shozo KAWAMURA, Sho MIYAGI, Tomohiko ISE, Masami MATSUBARA
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	shm strain measurement layered structure natural vibration mode random response Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/bf7be5bd79bd4725b5f42ffc39f3c6ae
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spelling	oai:doaj.org-article:bf7be5bd79bd4725b5f42ffc39f3c6ae2021-11-29T05:34:41ZStructural health monitoring of layered structure by strain measurements2187-974510.1299/mej.18-00390https://doaj.org/article/bf7be5bd79bd4725b5f42ffc39f3c6ae2019-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/1/6_18-00390/_pdf/-char/enhttps://doaj.org/toc/2187-9745Structural health monitoring (SHM) of building structures is a very important technology in the effort to realize a sustainable society. Various studies on SHM have been carried out, and it is effective because it avoids accidents and predicts behaviour of structures. In this study, we proposed a method of SHM for a layered structure, in which the abnormal layer of the structure was identified by strain measurement. The main point of the study is that rotational degrees of freedom are constrained at both ends of the wall, so that the wall of each layer vibrates individually. First, in the normal condition, a location where the strain is almost zero on the outer wall of each layer is specified, and the strain at that point is constantly measured. Then, when an abnormality occurs in a certain layer, a significant value of strain appears in the abnormal layer where the strain is originally zero. We verify the proposed method by numerical simulation. We consider a three-layered structure, modelled as a cantilever beam. Abnormality is assumed to be the decrement of stiffness at a certain element, and it was shown that the effect of abnormality appeared throughout the structure in the natural vibration mode while it appeared locally in the strain measurement. The random response was then calculated by numerical integration, and the layer where the abnormality occurred could be identified by using the proposed method. Finally, we checked the applicability of the proposed method by experiment. As a result, it was shown that the method was possible to identify the layer where an abnormality occurred as well as numerical simulation.Shozo KAWAMURASho MIYAGITomohiko ISEMasami MATSUBARAThe Japan Society of Mechanical Engineersarticleshmstrain measurementlayered structurenatural vibration moderandom responseMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 1, Pp 18-00390-18-00390 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	shm strain measurement layered structure natural vibration mode random response Mechanical engineering and machinery TJ1-1570
spellingShingle	shm strain measurement layered structure natural vibration mode random response Mechanical engineering and machinery TJ1-1570 Shozo KAWAMURA Sho MIYAGI Tomohiko ISE Masami MATSUBARA Structural health monitoring of layered structure by strain measurements
description	Structural health monitoring (SHM) of building structures is a very important technology in the effort to realize a sustainable society. Various studies on SHM have been carried out, and it is effective because it avoids accidents and predicts behaviour of structures. In this study, we proposed a method of SHM for a layered structure, in which the abnormal layer of the structure was identified by strain measurement. The main point of the study is that rotational degrees of freedom are constrained at both ends of the wall, so that the wall of each layer vibrates individually. First, in the normal condition, a location where the strain is almost zero on the outer wall of each layer is specified, and the strain at that point is constantly measured. Then, when an abnormality occurs in a certain layer, a significant value of strain appears in the abnormal layer where the strain is originally zero. We verify the proposed method by numerical simulation. We consider a three-layered structure, modelled as a cantilever beam. Abnormality is assumed to be the decrement of stiffness at a certain element, and it was shown that the effect of abnormality appeared throughout the structure in the natural vibration mode while it appeared locally in the strain measurement. The random response was then calculated by numerical integration, and the layer where the abnormality occurred could be identified by using the proposed method. Finally, we checked the applicability of the proposed method by experiment. As a result, it was shown that the method was possible to identify the layer where an abnormality occurred as well as numerical simulation.
format	article
author	Shozo KAWAMURA Sho MIYAGI Tomohiko ISE Masami MATSUBARA
author_facet	Shozo KAWAMURA Sho MIYAGI Tomohiko ISE Masami MATSUBARA
author_sort	Shozo KAWAMURA
title	Structural health monitoring of layered structure by strain measurements
title_short	Structural health monitoring of layered structure by strain measurements
title_full	Structural health monitoring of layered structure by strain measurements
title_fullStr	Structural health monitoring of layered structure by strain measurements
title_full_unstemmed	Structural health monitoring of layered structure by strain measurements
title_sort	structural health monitoring of layered structure by strain measurements
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/bf7be5bd79bd4725b5f42ffc39f3c6ae
work_keys_str_mv	AT shozokawamura structuralhealthmonitoringoflayeredstructurebystrainmeasurements AT shomiyagi structuralhealthmonitoringoflayeredstructurebystrainmeasurements AT tomohikoise structuralhealthmonitoringoflayeredstructurebystrainmeasurements AT masamimatsubara structuralhealthmonitoringoflayeredstructurebystrainmeasurements
_version_	1718407670433579008

Structural health monitoring of layered structure by strain measurements

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