Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista IBRACON de Estruturas e Materiais |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000500214 |
Resumo: | abstract: Due to low stiffness to lateral bending, long prestressed precast concrete beams are subject to lateral instability. For this reason, the safety analysis of these beams during the transitory stages of transport, lifting and assembly is fundamental. This work presents a nonlinear analytical model for the parametrical analysis of beams on bearing pads in their definitive location, without the effective connections being made. Such a solution determines a critical load of instability and considers the geometry of the cross-section, physical characteristics of the materials as well as geometric imperfections. A parametrical simulation is performed for the initial eccentricity, the initial rotation of the beam, concrete resistance, bearing pads dimensions, and the cross-section of the beam. The results show that the parameters of most considerable influence on beam stability are rotation stiffness of the bearing and the geometric characteristics of the cross-section of the beam, which can result in a reduction of about 50% of the critical rollover load. In addition, the cracking load may, in some cases, be close to the critical toppling load. |
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Parametric analysis of analytical solutions of the rollover of precast beams on bearing padsstabilityprecast beamsanalytical studyparametric studyMonte Carlo simulationabstract: Due to low stiffness to lateral bending, long prestressed precast concrete beams are subject to lateral instability. For this reason, the safety analysis of these beams during the transitory stages of transport, lifting and assembly is fundamental. This work presents a nonlinear analytical model for the parametrical analysis of beams on bearing pads in their definitive location, without the effective connections being made. Such a solution determines a critical load of instability and considers the geometry of the cross-section, physical characteristics of the materials as well as geometric imperfections. A parametrical simulation is performed for the initial eccentricity, the initial rotation of the beam, concrete resistance, bearing pads dimensions, and the cross-section of the beam. The results show that the parameters of most considerable influence on beam stability are rotation stiffness of the bearing and the geometric characteristics of the cross-section of the beam, which can result in a reduction of about 50% of the critical rollover load. In addition, the cracking load may, in some cases, be close to the critical toppling load.IBRACON - Instituto Brasileiro do Concreto2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000500214Revista IBRACON de Estruturas e Materiais v.13 n.5 2020reponame:Revista IBRACON de Estruturas e Materiaisinstname:Instituto Brasileiro do Concreto (IBRACON)instacron:IBRACON10.1590/s1983-41952020000500011info:eu-repo/semantics/openAccessOliveira,Marina Fernandes AlvarengaKrahl,Pablo AugustoLima,Maria Cristina Vidigal deeng2020-10-21T00:00:00Zoai:scielo:S1983-41952020000500214Revistahttp://www.revistas.ibracon.org.br/index.php/riemhttps://old.scielo.br/oai/scielo-oai.phpeditores.riem@gmail.com||arlene@ibracon.org.br1983-41951983-4195opendoar:2020-10-21T00:00Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON)false |
dc.title.none.fl_str_mv |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
title |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
spellingShingle |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads Oliveira,Marina Fernandes Alvarenga stability precast beams analytical study parametric study Monte Carlo simulation |
title_short |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
title_full |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
title_fullStr |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
title_full_unstemmed |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
title_sort |
Parametric analysis of analytical solutions of the rollover of precast beams on bearing pads |
author |
Oliveira,Marina Fernandes Alvarenga |
author_facet |
Oliveira,Marina Fernandes Alvarenga Krahl,Pablo Augusto Lima,Maria Cristina Vidigal de |
author_role |
author |
author2 |
Krahl,Pablo Augusto Lima,Maria Cristina Vidigal de |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Oliveira,Marina Fernandes Alvarenga Krahl,Pablo Augusto Lima,Maria Cristina Vidigal de |
dc.subject.por.fl_str_mv |
stability precast beams analytical study parametric study Monte Carlo simulation |
topic |
stability precast beams analytical study parametric study Monte Carlo simulation |
description |
abstract: Due to low stiffness to lateral bending, long prestressed precast concrete beams are subject to lateral instability. For this reason, the safety analysis of these beams during the transitory stages of transport, lifting and assembly is fundamental. This work presents a nonlinear analytical model for the parametrical analysis of beams on bearing pads in their definitive location, without the effective connections being made. Such a solution determines a critical load of instability and considers the geometry of the cross-section, physical characteristics of the materials as well as geometric imperfections. A parametrical simulation is performed for the initial eccentricity, the initial rotation of the beam, concrete resistance, bearing pads dimensions, and the cross-section of the beam. The results show that the parameters of most considerable influence on beam stability are rotation stiffness of the bearing and the geometric characteristics of the cross-section of the beam, which can result in a reduction of about 50% of the critical rollover load. In addition, the cracking load may, in some cases, be close to the critical toppling load. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000500214 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952020000500214 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/s1983-41952020000500011 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
IBRACON - Instituto Brasileiro do Concreto |
publisher.none.fl_str_mv |
IBRACON - Instituto Brasileiro do Concreto |
dc.source.none.fl_str_mv |
Revista IBRACON de Estruturas e Materiais v.13 n.5 2020 reponame:Revista IBRACON de Estruturas e Materiais instname:Instituto Brasileiro do Concreto (IBRACON) instacron:IBRACON |
instname_str |
Instituto Brasileiro do Concreto (IBRACON) |
instacron_str |
IBRACON |
institution |
IBRACON |
reponame_str |
Revista IBRACON de Estruturas e Materiais |
collection |
Revista IBRACON de Estruturas e Materiais |
repository.name.fl_str_mv |
Revista IBRACON de Estruturas e Materiais - Instituto Brasileiro do Concreto (IBRACON) |
repository.mail.fl_str_mv |
editores.riem@gmail.com||arlene@ibracon.org.br |
_version_ |
1754193606142328832 |