Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength
Main Author: | |
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Publication Date: | 2016 |
Other Authors: | , |
Format: | Article |
Language: | eng |
Source: | Latin American journal of solids and structures (Online) |
Download full: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252016000500945 |
Summary: | Abstract If steel manufactures usually comply with the minimum code specifications, the nominal yield strength of rebar can however be significantly exceeded in many countries, depending on the steel manufacturing processes. Such an increase in yield strength can have negative effects on the flexural behavior of beams designed as tension controlled, and reduce their ductility, an essential property in seismic resisting structures. An experimental and analytical study of the flexural behavior of reinforced concrete (RC) beams was conducted through the investigation of the Moment-Curvature relationships and the ultimate steel strains. The main variable was the level of the actual steel yield stress as compared to the nominal value. It was found that unexpectedly high values of steel yield stress reduce the beam ductility and violate the tension-control condition which was enforced in the design stage. Appropriate design corrections are proposed to account for high yield stress values in order to achieve the desired ductility of beams while maintaining the moment capacities. |
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Latin American journal of solids and structures (Online) |
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Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield StrengthReinforced concretebeam flexureductilitymoment curvatureyield strengthAbstract If steel manufactures usually comply with the minimum code specifications, the nominal yield strength of rebar can however be significantly exceeded in many countries, depending on the steel manufacturing processes. Such an increase in yield strength can have negative effects on the flexural behavior of beams designed as tension controlled, and reduce their ductility, an essential property in seismic resisting structures. An experimental and analytical study of the flexural behavior of reinforced concrete (RC) beams was conducted through the investigation of the Moment-Curvature relationships and the ultimate steel strains. The main variable was the level of the actual steel yield stress as compared to the nominal value. It was found that unexpectedly high values of steel yield stress reduce the beam ductility and violate the tension-control condition which was enforced in the design stage. Appropriate design corrections are proposed to account for high yield stress values in order to achieve the desired ductility of beams while maintaining the moment capacities.Associação Brasileira de Ciências Mecânicas2016-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252016000500945Latin American Journal of Solids and Structures v.13 n.5 2016reponame:Latin American journal of solids and structures (Online)instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)instacron:ABCM10.1590/1679-78251683info:eu-repo/semantics/openAccessCharif,AbdelhamidMourad,Shehab M.Khan,M. Iqbaleng2016-07-05T00:00:00Zoai:scielo:S1679-78252016000500945Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=1679-7825&lng=pt&nrm=isohttps://old.scielo.br/oai/scielo-oai.phpabcm@abcm.org.br||maralves@usp.br1679-78251679-7817opendoar:2016-07-05T00:00Latin American journal of solids and structures (Online) - Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM)false |
dc.title.none.fl_str_mv |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
title |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
spellingShingle |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength Charif,Abdelhamid Reinforced concrete beam flexure ductility moment curvature yield strength |
title_short |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
title_full |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
title_fullStr |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
title_full_unstemmed |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
title_sort |
Flexural Behavior of Beams Reinforced with Steel Bars Exceeding the Nominal Yield Strength |
author |
Charif,Abdelhamid |
author_facet |
Charif,Abdelhamid Mourad,Shehab M. Khan,M. Iqbal |
author_role |
author |
author2 |
Mourad,Shehab M. Khan,M. Iqbal |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Charif,Abdelhamid Mourad,Shehab M. Khan,M. Iqbal |
dc.subject.por.fl_str_mv |
Reinforced concrete beam flexure ductility moment curvature yield strength |
topic |
Reinforced concrete beam flexure ductility moment curvature yield strength |
description |
Abstract If steel manufactures usually comply with the minimum code specifications, the nominal yield strength of rebar can however be significantly exceeded in many countries, depending on the steel manufacturing processes. Such an increase in yield strength can have negative effects on the flexural behavior of beams designed as tension controlled, and reduce their ductility, an essential property in seismic resisting structures. An experimental and analytical study of the flexural behavior of reinforced concrete (RC) beams was conducted through the investigation of the Moment-Curvature relationships and the ultimate steel strains. The main variable was the level of the actual steel yield stress as compared to the nominal value. It was found that unexpectedly high values of steel yield stress reduce the beam ductility and violate the tension-control condition which was enforced in the design stage. Appropriate design corrections are proposed to account for high yield stress values in order to achieve the desired ductility of beams while maintaining the moment capacities. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-05-01 |
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=S1679-78252016000500945 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-78252016000500945 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1679-78251683 |
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 |
Associação Brasileira de Ciências Mecânicas |
publisher.none.fl_str_mv |
Associação Brasileira de Ciências Mecânicas |
dc.source.none.fl_str_mv |
Latin American Journal of Solids and Structures v.13 n.5 2016 reponame:Latin American journal of solids and structures (Online) instname:Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) instacron:ABCM |
instname_str |
Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) |
instacron_str |
ABCM |
institution |
ABCM |
reponame_str |
Latin American journal of solids and structures (Online) |
collection |
Latin American journal of solids and structures (Online) |
repository.name.fl_str_mv |
Latin American journal of solids and structures (Online) - Associação Brasileira de Engenharia e Ciências Mecânicas (ABCM) |
repository.mail.fl_str_mv |
abcm@abcm.org.br||maralves@usp.br |
_version_ |
1754302888426864640 |