Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney
The present paper deals with the dynamic characterisation of a historical masonry chimney aimed at identifying the structural damage and assessing its seismic performance. The structure was severely damaged by a lightning accident and in-depth repair works were executed to re-instate its sound confi...
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
2017-07-01
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doaj-3f6de818328241138e4959c6a12703542020-11-25T01:07:44ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X2017-07-0160410.4401/ag-71266263Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry ChimneyMaria-Giovanna Masciotta0Luis F. Ramos1Paulo B. Lourenço2Marcello Vasta3ISISE, University of Minho, Department of Civil EngineeringISISE, University of Minho, Department of Civil EngineeringISISE, University of Minho, Department of Civil EngineeringUniversity "G. d'Annunzio" of Chieti-Pescara, Department of Engineering and GeologyThe present paper deals with the dynamic characterisation of a historical masonry chimney aimed at identifying the structural damage and assessing its seismic performance. The structure was severely damaged by a lightning accident and in-depth repair works were executed to re-instate its sound configuration. The case study is fully detailed, including the aspects of survey, inspection, diagnosis, and evolution of the dynamic properties of the system throughout the structural intervention. Considering the explicit dependence of the power spectral densities of measured nodal processes on their frequency content, a spectrum-driven algorithm is used to detect and locate the damage. The paper shows that the eigenparameters obtained from the decomposition of the response power spectrum matrix are sensitive to system’s changes caused by evolutionary damage scenarios, thereby resulting excellent indicators for assessing both the presence and position of structural vulnerabilities. The results are compared with the ones from other modal-based damage identification methods and the strengths/limitations of the tools currently available in literature are extensively discussed. Finally, based on the crack pattern surveyed before the repair works, the weakest links of the chimney are identified and the most meaningful collapse mechanisms are analysed to verify the seismic capacity of the structure. According to the results of the kinematic analysis, the chimney does withstand the maximum site peak ground acceleration.http://www.annalsofgeophysics.eu/index.php/annals/article/view/7126Operational modal analysisdamage identificationpower spectral densitiesseismic vulnerability assessmenthistoric masonry chimney |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maria-Giovanna Masciotta Luis F. Ramos Paulo B. Lourenço Marcello Vasta |
spellingShingle |
Maria-Giovanna Masciotta Luis F. Ramos Paulo B. Lourenço Marcello Vasta Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney Annals of Geophysics Operational modal analysis damage identification power spectral densities seismic vulnerability assessment historic masonry chimney |
author_facet |
Maria-Giovanna Masciotta Luis F. Ramos Paulo B. Lourenço Marcello Vasta |
author_sort |
Maria-Giovanna Masciotta |
title |
Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney |
title_short |
Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney |
title_full |
Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney |
title_fullStr |
Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney |
title_full_unstemmed |
Damage Identification and Seismic Vulnerability Assessment of a Historic Masonry Chimney |
title_sort |
damage identification and seismic vulnerability assessment of a historic masonry chimney |
publisher |
Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
series |
Annals of Geophysics |
issn |
1593-5213 2037-416X |
publishDate |
2017-07-01 |
description |
The present paper deals with the dynamic characterisation of a historical masonry chimney aimed at identifying the structural damage and assessing its seismic performance. The structure was severely damaged by a lightning accident and in-depth repair works were executed to re-instate its sound configuration. The case study is fully detailed, including the aspects of survey, inspection, diagnosis, and evolution of the dynamic properties of the system throughout the structural intervention. Considering the explicit dependence of the power spectral densities of measured nodal processes on their frequency content, a spectrum-driven algorithm is used to detect and locate the damage. The paper shows that the eigenparameters obtained from the decomposition of the response power spectrum matrix are sensitive to system’s changes caused by evolutionary damage scenarios, thereby resulting excellent indicators for assessing both the presence and position of structural vulnerabilities. The results are compared with the ones from other modal-based damage identification methods and the strengths/limitations of the tools currently available in literature are extensively discussed. Finally, based on the crack pattern surveyed before the repair works, the weakest links of the chimney are identified and the most meaningful collapse mechanisms are analysed to verify the seismic capacity of the structure. According to the results of the kinematic analysis, the chimney does withstand the maximum site peak ground acceleration. |
topic |
Operational modal analysis damage identification power spectral densities seismic vulnerability assessment historic masonry chimney |
url |
http://www.annalsofgeophysics.eu/index.php/annals/article/view/7126 |
work_keys_str_mv |
AT mariagiovannamasciotta damageidentificationandseismicvulnerabilityassessmentofahistoricmasonrychimney AT luisframos damageidentificationandseismicvulnerabilityassessmentofahistoricmasonrychimney AT pauloblourenco damageidentificationandseismicvulnerabilityassessmentofahistoricmasonrychimney AT marcellovasta damageidentificationandseismicvulnerabilityassessmentofahistoricmasonrychimney |
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