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

2022-04-02Journal article Open access
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dc.contributor.authorOliveira, Sérgio
dc.contributor.authorAlegre, André
dc.contributor.authorCarvalho, Ezequiel
dc.contributor.authorMENDES, PAULO
dc.contributor.authorProença, Jorge
dc.date.accessioned2022-04-07T08:47:59Z
dc.date.available2022-04-07T08:47:59Z
dc.date.issued2022-04-02
dc.description.abstractThis 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.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationOLIVEIRA, 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.pt_PT
dc.identifier.doi10.1007/s10518-022-01392-1pt_PT
dc.identifier.eissn1573-1456
dc.identifier.issn1570-761X
dc.identifier.urihttp://hdl.handle.net/10400.21/14556
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationSFRH/BD/116417/2016 - FCTpt_PT
dc.relationPTDC / ECI-EGC / 5332/2020 - SSHM4Damspt_PT
dc.relation.publisherversionhttps://link.springer.com/article/10.1007/s10518-022-01392-1pt_PT
dc.subjectDynamic behaviour of large concrete damspt_PT
dc.subjectFinite element numerical modellingpt_PT
dc.subjectSeismic and structural health monitoringpt_PT
dc.subjectSafety controlpt_PT
dc.subjectDam-reservoirfoundation systemspt_PT
dc.subjectEvolution of natural frequenciespt_PT
dc.subjectVibration modespt_PT
dc.subjectSeismic responsept_PT
dc.titleSeismic and structural health monitoring systems for large dams: theoretical, computational and practical innovationspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage4512pt_PT
oaire.citation.issue9
oaire.citation.startPage4483pt_PT
oaire.citation.titleBulletin of Earthquake Engineeringpt_PT
oaire.citation.volume20
person.familyNameMartins de Oliveira
person.familyNameAlegre
person.familyNameCarvalho
person.familyNameHENRIQUES MENDES
person.familyNameSilveira Filipe Mascarenhas Proença
person.givenNameSérgio Bruno
person.givenNameAndré
person.givenNameEzequiel
person.givenNamePAULO JORGE
person.givenNameJorge Miguel
person.identifier2531971
person.identifier.ciencia-id7F19-0A6E-5F4F
person.identifier.ciencia-id5F14-B9A9-9A14
person.identifier.ciencia-id8516-1F7F-1528
person.identifier.ciencia-id011F-09B7-3D52
person.identifier.orcid0000-0003-3309-5897
person.identifier.orcid0000-0001-8324-7559
person.identifier.orcid0000-0002-5687-4925
person.identifier.orcid0000-0002-4833-5091
person.identifier.orcid0000-0001-6308-7228
person.identifier.scopus-author-id57211513277
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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