Simplified analysis of RC beam and beam-column elements under blast loading
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/130563 |
Resumo: | The present work aims to provide a non-linear numerical tool capable of analysing the structural response of reinforced concrete beam and beam-column elements when subjected to blast loads. The increasing frequency of explosion events, stemming from terrorist attacks resorting to improvised explosive devices, or from accidental misuse of hazardous substances has shined a new light on the topic of blast resistant structural design. Recently, many studies have been conducted to better understand how to improve the design of blast resistant solutions in newly constructed buildings, as well as to provide retrofitting reinforcement solutions to pre-existing ones. Columns are a key structural component in any building, supporting its weight and transferring it to the foundations. If many of these elements fail when subjected to a blast event, then the structure’s load bearing capacity may be compromised, initiating its progressing collapse and endangering the lives of the people inside. The work featured in the present dissertation entails the development of a simplified numerical tool that analyses structural elements subject to blast loads, using single-degree-of-freedom systems with equivalent properties. The numerical estimates are then compared with experimental data found in the literature to assess the quality of the numerical predictions. Both beam and beam-column output results differ no more than 25% from experimental the data. The possible sources of this discrepancy are investigated and it’s concluded that the numerical model developed herein proves to be a good preliminary analysis tool for the estimate of the structural response of beams and beam-columns, when subjected to blast loads. |
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Simplified analysis of RC beam and beam-column elements under blast loadingBeamBeam-columnNon-linear dynamic analysisSimplified SDOF numerical modelsBlast loadDomínio/Área Científica::Engenharia e Tecnologia::Engenharia CivilThe present work aims to provide a non-linear numerical tool capable of analysing the structural response of reinforced concrete beam and beam-column elements when subjected to blast loads. The increasing frequency of explosion events, stemming from terrorist attacks resorting to improvised explosive devices, or from accidental misuse of hazardous substances has shined a new light on the topic of blast resistant structural design. Recently, many studies have been conducted to better understand how to improve the design of blast resistant solutions in newly constructed buildings, as well as to provide retrofitting reinforcement solutions to pre-existing ones. Columns are a key structural component in any building, supporting its weight and transferring it to the foundations. If many of these elements fail when subjected to a blast event, then the structure’s load bearing capacity may be compromised, initiating its progressing collapse and endangering the lives of the people inside. The work featured in the present dissertation entails the development of a simplified numerical tool that analyses structural elements subject to blast loads, using single-degree-of-freedom systems with equivalent properties. The numerical estimates are then compared with experimental data found in the literature to assess the quality of the numerical predictions. Both beam and beam-column output results differ no more than 25% from experimental the data. The possible sources of this discrepancy are investigated and it’s concluded that the numerical model developed herein proves to be a good preliminary analysis tool for the estimate of the structural response of beams and beam-columns, when subjected to blast loads.O presente trabalho visa o desenvolvimento de um modelo numérico não-linear simplificado capaz de analisar a resposta estrutural de vigas e pilares (vigas-coluna) de betão armado, quando sujeitos a cargas explosivas. A frequência crescente de explosões, decorrentes de ataques terroristas com recurso a engenhos explosivos improvisados ou produzidas acidentalmente, quando substâncias perigosas são manuseadas de forma negligente ou derivadas da fraca manutenção de equipamentos, direcionou a atenção da comunidade científica para o tópico de projeto de estruturas resistentes a ações explosivas. Recentemente, muitos estudos têm sido conduzidos a fim de entender como melhorar o comportamento de soluções construtivas face a ações explosivas, bem como fornecer soluções de reforço a elementos estruturais pré-existentes. Os pilares são componentes estruturais fulcrais em qualquer edifício, suportando o seu peso, transferindo-o para as fundações. Se muitos desses elementos cederem quando submetidos a uma explosão, a capacidade portante da estrutura poderá ser comprometida, bem como a vida das pessoas que a utilizam. O trabalho apresentado nesta dissertação envolve o desenvolvimento de um modelo numérico simplificado com o objetivo de analisar elementos estruturais, tais como vigas e pilares sujeitos a cargas explosivas, através de sistemas equivalentes de um grau de liberdade. Os resultados do modelo numérico são então comparados com dados experimentais encontrados na literatura, para avaliar as qualidades das simulações. Os resultados obtidos, tanto para vigas como para pilares, não diferem mais que cerca de 25% dos dados experimentais. As possíveis fontes para esta discrepância são investigadas e conclui-se que o modelo numérico aqui desenvolvido revela-se como uma boa ferramenta para a estimativa da resposta estrutural deste tipo de elementos, quando submetidos a cargas explosivas.Cismasiu, IldiCismasiu, CorneliuRUNCarvalho, Diogo Miguel Vieira Alves de2022-01-10T14:47:27Z2021-092021-09-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/130563enginfo: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:RCAAP2024-03-11T05:09:07Zoai:run.unl.pt:10362/130563Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:46:47.349913Repositório 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 |
Simplified analysis of RC beam and beam-column elements under blast loading |
title |
Simplified analysis of RC beam and beam-column elements under blast loading |
spellingShingle |
Simplified analysis of RC beam and beam-column elements under blast loading Carvalho, Diogo Miguel Vieira Alves de Beam Beam-column Non-linear dynamic analysis Simplified SDOF numerical models Blast load Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Civil |
title_short |
Simplified analysis of RC beam and beam-column elements under blast loading |
title_full |
Simplified analysis of RC beam and beam-column elements under blast loading |
title_fullStr |
Simplified analysis of RC beam and beam-column elements under blast loading |
title_full_unstemmed |
Simplified analysis of RC beam and beam-column elements under blast loading |
title_sort |
Simplified analysis of RC beam and beam-column elements under blast loading |
author |
Carvalho, Diogo Miguel Vieira Alves de |
author_facet |
Carvalho, Diogo Miguel Vieira Alves de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Cismasiu, Ildi Cismasiu, Corneliu RUN |
dc.contributor.author.fl_str_mv |
Carvalho, Diogo Miguel Vieira Alves de |
dc.subject.por.fl_str_mv |
Beam Beam-column Non-linear dynamic analysis Simplified SDOF numerical models Blast load Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Civil |
topic |
Beam Beam-column Non-linear dynamic analysis Simplified SDOF numerical models Blast load Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Civil |
description |
The present work aims to provide a non-linear numerical tool capable of analysing the structural response of reinforced concrete beam and beam-column elements when subjected to blast loads. The increasing frequency of explosion events, stemming from terrorist attacks resorting to improvised explosive devices, or from accidental misuse of hazardous substances has shined a new light on the topic of blast resistant structural design. Recently, many studies have been conducted to better understand how to improve the design of blast resistant solutions in newly constructed buildings, as well as to provide retrofitting reinforcement solutions to pre-existing ones. Columns are a key structural component in any building, supporting its weight and transferring it to the foundations. If many of these elements fail when subjected to a blast event, then the structure’s load bearing capacity may be compromised, initiating its progressing collapse and endangering the lives of the people inside. The work featured in the present dissertation entails the development of a simplified numerical tool that analyses structural elements subject to blast loads, using single-degree-of-freedom systems with equivalent properties. The numerical estimates are then compared with experimental data found in the literature to assess the quality of the numerical predictions. Both beam and beam-column output results differ no more than 25% from experimental the data. The possible sources of this discrepancy are investigated and it’s concluded that the numerical model developed herein proves to be a good preliminary analysis tool for the estimate of the structural response of beams and beam-columns, when subjected to blast loads. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09 2021-09-01T00:00:00Z 2022-01-10T14:47:27Z |
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/10362/130563 |
url |
http://hdl.handle.net/10362/130563 |
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.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 |
instacron_str |
RCAAP |
institution |
RCAAP |
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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1799138070938779648 |