Seismic and structural health monitoring systems for large dams: theoretical, computational and practical innovations
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
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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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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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