Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations

Detalhes bibliográficos
Autor(a) principal: Oliveira, Sérgio
Data de Publicação: 2022
Outros Autores: Alegre, André, Carvalho, Ezequiel, MENDES, PAULO, Proença, Jorge
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.21/14556
Resumo: This paper is focused on the study of the dynamic behaviour of two large arch dams, and it presents some innovations for the improvement of Seismic and Structural Health Monitoring (SSHM) systems for dams. The work describes a methodology based on the integrated use of software for automatic monitoring data analysis and of computational 3D fnite element (3DFE) models for dam dynamic behaviour simulation. The monitoring data analysis software was developed for automatic modal identifcation, in order to obtain natural frequencies and mode shapes, for automatic detection of vibrations induced by seismic events, to be distinguished from those caused by other operational sources, and for comparison between results retrieved from measured vibrations and numerical results from 3DFE modelling. The numerical simulations are carried out using a 3DFE program developed for dynamic analysis of dam-reservoir-foundation systems, based on a solid–fuid coupled formulation and considering the dam-water dynamic interaction, including calculation modules for complex modal analysis and for linear and non-linear seismic analysis. The case studies are two large arch dams that have been under continuous dynamic monitoring over the last ten years: Cabril dam (132 m high), the highest dam in Portugal, and Cahora Bassa dam (170 m high), in Mozambique, one of the highest dams in Africa. The SSHM systems installed in both dams have similar schemes and were designed to continuously record accelerations in several locations at the upper part of the dam body and near the dam-foundation interface, using uniaxial and triaxial accelerometers. The most signifcant experimental results from continuous dynamic monitoring are presented and compared with numerical results for both dams, with emphasis on the evolution of natural frequencies over time, including the vibration mode shapes for various water levels, and on the measured accelerations during low-intensity seismic events. Furthermore, the main results of non-linear seismic response simulations are provided, considering the efects due to joint movements and tensile and compressive concrete damage, aiming to assess the seismic performance of both dams based on the Endurance Time Analysis method.
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spelling Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovationsDynamic behaviour of large concrete damsFinite element numerical modellingSeismic and structural health monitoringSafety controlDam-reservoirfoundation systemsEvolution of natural frequenciesVibration modesSeismic responseThis paper is focused on the study of the dynamic behaviour of two large arch dams, and it presents some innovations for the improvement of Seismic and Structural Health Monitoring (SSHM) systems for dams. The work describes a methodology based on the integrated use of software for automatic monitoring data analysis and of computational 3D fnite element (3DFE) models for dam dynamic behaviour simulation. The monitoring data analysis software was developed for automatic modal identifcation, in order to obtain natural frequencies and mode shapes, for automatic detection of vibrations induced by seismic events, to be distinguished from those caused by other operational sources, and for comparison between results retrieved from measured vibrations and numerical results from 3DFE modelling. The numerical simulations are carried out using a 3DFE program developed for dynamic analysis of dam-reservoir-foundation systems, based on a solid–fuid coupled formulation and considering the dam-water dynamic interaction, including calculation modules for complex modal analysis and for linear and non-linear seismic analysis. The case studies are two large arch dams that have been under continuous dynamic monitoring over the last ten years: Cabril dam (132 m high), the highest dam in Portugal, and Cahora Bassa dam (170 m high), in Mozambique, one of the highest dams in Africa. The SSHM systems installed in both dams have similar schemes and were designed to continuously record accelerations in several locations at the upper part of the dam body and near the dam-foundation interface, using uniaxial and triaxial accelerometers. The most signifcant experimental results from continuous dynamic monitoring are presented and compared with numerical results for both dams, with emphasis on the evolution of natural frequencies over time, including the vibration mode shapes for various water levels, and on the measured accelerations during low-intensity seismic events. Furthermore, the main results of non-linear seismic response simulations are provided, considering the efects due to joint movements and tensile and compressive concrete damage, aiming to assess the seismic performance of both dams based on the Endurance Time Analysis method.SpringerRCIPLOliveira, SérgioAlegre, AndréCarvalho, EzequielMENDES, PAULOProença, Jorge2022-04-07T08:47:59Z2022-04-022022-04-02T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/14556engOLIVEIRA, Sérgio; [et al] – Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations. Bulletin of Earthquake Engineering. eISSN 1573-1456. Vol. 20, N.º 9, SI (2022), pp. 4483-4512.1570-761X10.1007/s10518-022-01392-11573-1456metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T10:10:52Zoai:repositorio.ipl.pt:10400.21/14556Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:22:20.505891Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
title Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
spellingShingle Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
Oliveira, Sérgio
Dynamic behaviour of large concrete dams
Finite element numerical modelling
Seismic and structural health monitoring
Safety control
Dam-reservoirfoundation systems
Evolution of natural frequencies
Vibration modes
Seismic response
title_short Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
title_full Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
title_fullStr Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
title_full_unstemmed Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
title_sort Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
author Oliveira, Sérgio
author_facet Oliveira, Sérgio
Alegre, André
Carvalho, Ezequiel
MENDES, PAULO
Proença, Jorge
author_role author
author2 Alegre, André
Carvalho, Ezequiel
MENDES, PAULO
Proença, Jorge
author2_role author
author
author
author
dc.contributor.none.fl_str_mv RCIPL
dc.contributor.author.fl_str_mv Oliveira, Sérgio
Alegre, André
Carvalho, Ezequiel
MENDES, PAULO
Proença, Jorge
dc.subject.por.fl_str_mv Dynamic behaviour of large concrete dams
Finite element numerical modelling
Seismic and structural health monitoring
Safety control
Dam-reservoirfoundation systems
Evolution of natural frequencies
Vibration modes
Seismic response
topic Dynamic behaviour of large concrete dams
Finite element numerical modelling
Seismic and structural health monitoring
Safety control
Dam-reservoirfoundation systems
Evolution of natural frequencies
Vibration modes
Seismic response
description This paper is focused on the study of the dynamic behaviour of two large arch dams, and it presents some innovations for the improvement of Seismic and Structural Health Monitoring (SSHM) systems for dams. The work describes a methodology based on the integrated use of software for automatic monitoring data analysis and of computational 3D fnite element (3DFE) models for dam dynamic behaviour simulation. The monitoring data analysis software was developed for automatic modal identifcation, in order to obtain natural frequencies and mode shapes, for automatic detection of vibrations induced by seismic events, to be distinguished from those caused by other operational sources, and for comparison between results retrieved from measured vibrations and numerical results from 3DFE modelling. The numerical simulations are carried out using a 3DFE program developed for dynamic analysis of dam-reservoir-foundation systems, based on a solid–fuid coupled formulation and considering the dam-water dynamic interaction, including calculation modules for complex modal analysis and for linear and non-linear seismic analysis. The case studies are two large arch dams that have been under continuous dynamic monitoring over the last ten years: Cabril dam (132 m high), the highest dam in Portugal, and Cahora Bassa dam (170 m high), in Mozambique, one of the highest dams in Africa. The SSHM systems installed in both dams have similar schemes and were designed to continuously record accelerations in several locations at the upper part of the dam body and near the dam-foundation interface, using uniaxial and triaxial accelerometers. The most signifcant experimental results from continuous dynamic monitoring are presented and compared with numerical results for both dams, with emphasis on the evolution of natural frequencies over time, including the vibration mode shapes for various water levels, and on the measured accelerations during low-intensity seismic events. Furthermore, the main results of non-linear seismic response simulations are provided, considering the efects due to joint movements and tensile and compressive concrete damage, aiming to assess the seismic performance of both dams based on the Endurance Time Analysis method.
publishDate 2022
dc.date.none.fl_str_mv 2022-04-07T08:47:59Z
2022-04-02
2022-04-02T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.21/14556
url http://hdl.handle.net/10400.21/14556
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv OLIVEIRA, Sérgio; [et al] – Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations. Bulletin of Earthquake Engineering. eISSN 1573-1456. Vol. 20, N.º 9, SI (2022), pp. 4483-4512.
1570-761X
10.1007/s10518-022-01392-1
1573-1456
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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