On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes

Detalhes bibliográficos
Autor(a) principal: Santos, Warlley Soares
Data de Publicação: 2017
Tipo de documento: Tese
Idioma: eng
Título da fonte: Repositório Institucional da UFRJ
Texto Completo: http://hdl.handle.net/11422/6002
Resumo: Reports an experimental investigation on the behavior and ultimate strength of end-bolted cold-formed steel lipped channel columns selected to fail in distortional modes. Besides describing the test set-up and procedure, the available results are presented and discussed: they concern three tests and consist of (i) initial imperfection measurements, (ii) equilibrium paths relating the applied load to key column displacements and (iii) deformed configurations (including the collapse mode) and failure loads. The experimental results are used to validate ANSYS shell finite models intended to analyze the column geometrically and materially non-linear behavior. These models are then employed to perform a parametric study involving end-bolted lipped channel columns with various combinations of geometry (length and cross-section dimensions) and elastic-perfectly plastic material behavior (yield stress), aimed at (i) acquiring knowledge on the column post-buckling mechanics and strength reserve, and (ii) gathering ultimate strength data. Finally, the experimental and numerical failure load data obtained are used to assess the quality of their predictions by the current DSM distortional design curve and, if needed, provide preliminary guidelines on how to improve them.
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spelling On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modesEstruturas metálicasImperfeições e falhas dos materiaisAnálise experimental de estruturasEnd-bolted cold-formed steel columnsDistortional failuresDirect Strength Method (DSM) designExperimental analysis of structuresCNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS METALICASReports an experimental investigation on the behavior and ultimate strength of end-bolted cold-formed steel lipped channel columns selected to fail in distortional modes. Besides describing the test set-up and procedure, the available results are presented and discussed: they concern three tests and consist of (i) initial imperfection measurements, (ii) equilibrium paths relating the applied load to key column displacements and (iii) deformed configurations (including the collapse mode) and failure loads. The experimental results are used to validate ANSYS shell finite models intended to analyze the column geometrically and materially non-linear behavior. These models are then employed to perform a parametric study involving end-bolted lipped channel columns with various combinations of geometry (length and cross-section dimensions) and elastic-perfectly plastic material behavior (yield stress), aimed at (i) acquiring knowledge on the column post-buckling mechanics and strength reserve, and (ii) gathering ultimate strength data. Finally, the experimental and numerical failure load data obtained are used to assess the quality of their predictions by the current DSM distortional design curve and, if needed, provide preliminary guidelines on how to improve them.Reporta uma investigação experimental sobre o comportamento e resistência última de colunas de perfil formado a frio de seção transversal tipo U enrijecido com extremidades parafusadas selecionadas para falharem sob modo distorcional. Além de descrever o procedimento dos ensaios, os resultados são apresentados e discutidos, estes consistem em três testes: (i) medições de imperfeições inicias, (ii) trajetórias de equilíbrio e (iii) configuração da deformada (modo de falha) e as resistências últimas. Os resultados experimentais são usados para validar modelos numéricos pelo método dos elementos finitos com a finalidade de analisar o comportamento não linear geometricamente e do material das colunas. Esses modelos são então usados em análise paramétrica envolvendo colunas de seção tipo U enrijecido com extremidades parafusadas e parafusada-fixa com diversas combinações de geometria (comprimento e dimensões de seção transversal) e material com comportamento elástico-plástico perfeito (tensão de escoamento), objetivando adquirir conhecimento sobre o mecanismo de pós-flambagem e gerar dados de resistência última das colunas. Finalmente, os dados experimentais e numéricos de resistência última obtidos são usados para avaliar a qualidade das previsões pelo MRD da atual curva de dimensionamento distorcional e, se necessário, propor preliminarmente diretrizes sobre como melhorá-la.Universidade Federal do Rio de JaneiroBrasilInstituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de EngenhariaPrograma de Pós-Graduação em Engenharia CivilUFRJLandesmann, Alexandrehttp://lattes.cnpq.br/1711132081662931Camotim, Dinar Reis ZamithVellasco, Pedro Colmar Gonçalves da SilvaBasaglia, Cilmar DonizetiCarvalho, Eliane Maria LopesSantos, Warlley Soares2018-12-17T17:16:11Z2023-12-21T03:01:01Z2017-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesishttp://hdl.handle.net/11422/6002enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRJinstname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJ2023-12-21T03:01:01Zoai:pantheon.ufrj.br:11422/6002Repositório InstitucionalPUBhttp://www.pantheon.ufrj.br/oai/requestpantheon@sibi.ufrj.bropendoar:2023-12-21T03:01:01Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.none.fl_str_mv On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
title On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
spellingShingle On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
Santos, Warlley Soares
Estruturas metálicas
Imperfeições e falhas dos materiais
Análise experimental de estruturas
End-bolted cold-formed steel columns
Distortional failures
Direct Strength Method (DSM) design
Experimental analysis of structures
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS METALICAS
title_short On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
title_full On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
title_fullStr On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
title_full_unstemmed On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
title_sort On the strength and DSM design of end-bolted cold-formed steel columns buckling in distortional modes
author Santos, Warlley Soares
author_facet Santos, Warlley Soares
author_role author
dc.contributor.none.fl_str_mv Landesmann, Alexandre
http://lattes.cnpq.br/1711132081662931
Camotim, Dinar Reis Zamith
Vellasco, Pedro Colmar Gonçalves da Silva
Basaglia, Cilmar Donizeti
Carvalho, Eliane Maria Lopes
dc.contributor.author.fl_str_mv Santos, Warlley Soares
dc.subject.por.fl_str_mv Estruturas metálicas
Imperfeições e falhas dos materiais
Análise experimental de estruturas
End-bolted cold-formed steel columns
Distortional failures
Direct Strength Method (DSM) design
Experimental analysis of structures
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS METALICAS
topic Estruturas metálicas
Imperfeições e falhas dos materiais
Análise experimental de estruturas
End-bolted cold-formed steel columns
Distortional failures
Direct Strength Method (DSM) design
Experimental analysis of structures
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::ESTRUTURAS::ESTRUTURAS METALICAS
description Reports an experimental investigation on the behavior and ultimate strength of end-bolted cold-formed steel lipped channel columns selected to fail in distortional modes. Besides describing the test set-up and procedure, the available results are presented and discussed: they concern three tests and consist of (i) initial imperfection measurements, (ii) equilibrium paths relating the applied load to key column displacements and (iii) deformed configurations (including the collapse mode) and failure loads. The experimental results are used to validate ANSYS shell finite models intended to analyze the column geometrically and materially non-linear behavior. These models are then employed to perform a parametric study involving end-bolted lipped channel columns with various combinations of geometry (length and cross-section dimensions) and elastic-perfectly plastic material behavior (yield stress), aimed at (i) acquiring knowledge on the column post-buckling mechanics and strength reserve, and (ii) gathering ultimate strength data. Finally, the experimental and numerical failure load data obtained are used to assess the quality of their predictions by the current DSM distortional design curve and, if needed, provide preliminary guidelines on how to improve them.
publishDate 2017
dc.date.none.fl_str_mv 2017-12
2018-12-17T17:16:11Z
2023-12-21T03:01:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/11422/6002
url http://hdl.handle.net/11422/6002
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.publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Civil
UFRJ
publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
Brasil
Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia
Programa de Pós-Graduação em Engenharia Civil
UFRJ
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRJ
instname:Universidade Federal do Rio de Janeiro (UFRJ)
instacron:UFRJ
instname_str Universidade Federal do Rio de Janeiro (UFRJ)
instacron_str UFRJ
institution UFRJ
reponame_str Repositório Institucional da UFRJ
collection Repositório Institucional da UFRJ
repository.name.fl_str_mv Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ)
repository.mail.fl_str_mv pantheon@sibi.ufrj.br
_version_ 1815455980111003648

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