Flexural strengthening by means of a arc overlay in the tension zone

Bibliographic Details
Main Author: Rocha, Daphne Wojciechowski
Publication Date: 2012
Format: Master thesis
Language: eng
Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Download full: http://hdl.handle.net/10362/8850
Summary: Dissertação para obtenção do Grau de Mestre em Engenharia Civil – Perfil de Estruturas
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network_acronym_str RCAP
network_name_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository_id_str https://opendoar.ac.uk/repository/7160
spelling Flexural strengthening by means of a arc overlay in the tension zoneReinforced concreteStructural strengtheningInterfaceAdherenceConnectorsDissertação para obtenção do Grau de Mestre em Engenharia Civil – Perfil de EstruturasReinforced concrete structures may be flexurally strengthened in the tension zone by the addition of a new concrete layer with embedded steel reinforcement. However, the interface between the new and old concrete creates a weak area that may cause failure to occur for loads inferior to the designed. Therefore the success of this technique relies on the interface capacity to transmit stress. Surface treatments and cleanliness are the two main aspects that affect adhesion between different age concretes cast against each other. Nevertheless, the amount of steel reinforcement crossing the interface is a factor that may overcome adhesion and improve shear resistance. In the last years, several studies have been elaborated on this theme. In the present dissertation, an experimental study was conducted in order to evaluate the performance of this strengthening solution, characterize failure modes and shear resistance at the interface. Simply supported beams with a bonded concrete overlay in the tension zone were subjected to a three point bending test, and interfacial failure was forced. Three different solutions for stress transmission across the interface are analyzed. In the first solution, shear transmission relies solely on adherence, whereas the two remaining solutions were developed with the aim of evaluating the contribution of reinforcement crossing the interface. Regarding the strengthening solutions with reinforcement crossing the interface, the difference between the effect of reinforcement concentrated near the borders of the new concrete layer or equally distributed along the interface is studied. During the tests, ultimate load, deflections, steel strains, cracking and rupture modes were analyzed. The obtained values were compared among each other and with the provisions of EC2 and MC2010.Faculdade de Ciências e TecnologiaLúcio, VálterRUNRocha, Daphne Wojciechowski2013-02-20T14:42:19Z20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/8850enginfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2024-05-22T17:12:34Zoai:run.unl.pt:10362/8850Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-28T16:43:23.822649Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Flexural strengthening by means of a arc overlay in the tension zone
title Flexural strengthening by means of a arc overlay in the tension zone
spellingShingle Flexural strengthening by means of a arc overlay in the tension zone
Rocha, Daphne Wojciechowski
Reinforced concrete
Structural strengthening
Interface
Adherence
Connectors
title_short Flexural strengthening by means of a arc overlay in the tension zone
title_full Flexural strengthening by means of a arc overlay in the tension zone
title_fullStr Flexural strengthening by means of a arc overlay in the tension zone
title_full_unstemmed Flexural strengthening by means of a arc overlay in the tension zone
title_sort Flexural strengthening by means of a arc overlay in the tension zone
author Rocha, Daphne Wojciechowski
author_facet Rocha, Daphne Wojciechowski
author_role author
dc.contributor.none.fl_str_mv Lúcio, Válter
RUN
dc.contributor.author.fl_str_mv Rocha, Daphne Wojciechowski
dc.subject.por.fl_str_mv Reinforced concrete
Structural strengthening
Interface
Adherence
Connectors
topic Reinforced concrete
Structural strengthening
Interface
Adherence
Connectors
description Dissertação para obtenção do Grau de Mestre em Engenharia Civil – Perfil de Estruturas
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
2013-02-20T14:42:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/8850
url http://hdl.handle.net/10362/8850
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
dc.source.none.fl_str_mv reponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron:RCAAP
instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
instacron_str RCAAP
institution RCAAP
reponame_str Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
collection Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
repository.name.fl_str_mv Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
repository.mail.fl_str_mv info@rcaap.pt
_version_ 1833596144671784960

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