Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames

In AISC 360-16, the Direct Analysis Method (DM) has been set as the primary method for the stability design of frames. DM, considering initial global sway imperfection, is essentially Geometrically Non-linear Analysis (GNA) in which tangent modulus is used. The aim of this thesis is to provide stiff...

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Detalles Bibliográficos
Autor: Shen, Yanfei
Tipo de recurso: tesis doctoral
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/177806
Acceso en línea:https://hdl.handle.net/2117/177806
https://dx.doi.org/10.5821/dissertation-2117-177806
Access Level:acceso abierto
Palabra clave:Àrees temàtiques de la UPC::Enginyeria civil
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spelling Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel framesShen, YanfeiÀrees temàtiques de la UPC::Enginyeria civilIn AISC 360-16, the Direct Analysis Method (DM) has been set as the primary method for the stability design of frames. DM, considering initial global sway imperfection, is essentially Geometrically Non-linear Analysis (GNA) in which tangent modulus is used. The aim of this thesis is to provide stiffness reduction factor formulations for using GNA coupled with tangent modulus approach for the stability design of stainless steel frames. GNA with the proposed stiffness reduction factor is aligned to AISC 360-16 and it is aimed at facilitating greater and more efficient use of stainless steel. In accordance with current design standards, the ultimate limit state for this method is the formation of first plastic hinge, and the adequacy of the method is confirmed through member-based resistance checks.The focus of the thesis is the development of flexural stiffness reduction factor formulation for the in-plane stability design of stainless steel elements and frames with cold-formed square hollow section (SHS) and rectangular hollow section (RHS). The proposed beam-column stiffness reduction factor (tMN) accounts for the deleterious influence of material non-linearity, residual stresses and member out-of-straightness. The use of a GNA coupled with the proposed tMN eliminates the need for member buckling strength checks and thus, only cross-sectional strength checks are required.En la normativa Americana AISC 360-16, el método de análisis directo (DM) se ha establecido como el método principal en la verificación a inestabilidad de pórticos. El DM es esencialmente un análisis no lineal por la geometría (GNA) en el que se consideran las imperfecciones globales únicamente y se utiliza el módulo tangente. El objetivo de la tesis es proporcionar una formulación de rigidez reducida utilizando un análisis no lineal por la geometría para las verificaciones a inestabilidad de pórticos de acero inoxidable. El método propuesto se alinea con el AISC 360-16 y su objetivo es facilitar el uso del acero inoxidable en pórticos. De acuerdo con las normativas actuales, la capacidad última de un pórtico se define al formarse la primera rótula plástica y la verificación se plantea en base a la resistencia de los elementos aislados. El foco de la tesis se centra en el plantramiento de factores de reducción de rigidez a flexión de elementos tubulares de acero inoxidable conformados en frío (SHS y RHS) para el caso de diseño de pórticos cargados en su plano. Se propone un factor de reducción para elementos del tipo viga-columna mn el cual tiene en cuenta los efectos de la nolinealidad del material, las tensiones residuales y la imperfección del elemento. El uso de GNA conjuntamente con tMN permite verificar los diferentes elementos del pórtico solo a resistencia sin tener hacer las comprobaciones correspondientes a pandeo.Universitat Politècnica de CatalunyaChacón Flores, Rolando Antonio20192019-12-0220202020-02-11doctoral thesishttp://purl.org/coar/resource_type/c_db06VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/doctoralThesisapplication/pdfhttps://hdl.handle.net/2117/177806https://dx.doi.org/10.5821/dissertation-2117-177806reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1778062026-05-27T15:37:01Z
dc.title.none.fl_str_mv Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
title Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
spellingShingle Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
Shen, Yanfei
Àrees temàtiques de la UPC::Enginyeria civil
title_short Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
title_full Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
title_fullStr Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
title_full_unstemmed Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
title_sort Geometrically non-linear analysis with stiffness reduction for the in-plane stability design of stainless steel frames
dc.creator.none.fl_str_mv Shen, Yanfei
author Shen, Yanfei
author_facet Shen, Yanfei
author_role author
dc.contributor.none.fl_str_mv Chacón Flores, Rolando Antonio
dc.subject.none.fl_str_mv Àrees temàtiques de la UPC::Enginyeria civil
topic Àrees temàtiques de la UPC::Enginyeria civil
description In AISC 360-16, the Direct Analysis Method (DM) has been set as the primary method for the stability design of frames. DM, considering initial global sway imperfection, is essentially Geometrically Non-linear Analysis (GNA) in which tangent modulus is used. The aim of this thesis is to provide stiffness reduction factor formulations for using GNA coupled with tangent modulus approach for the stability design of stainless steel frames. GNA with the proposed stiffness reduction factor is aligned to AISC 360-16 and it is aimed at facilitating greater and more efficient use of stainless steel. In accordance with current design standards, the ultimate limit state for this method is the formation of first plastic hinge, and the adequacy of the method is confirmed through member-based resistance checks.The focus of the thesis is the development of flexural stiffness reduction factor formulation for the in-plane stability design of stainless steel elements and frames with cold-formed square hollow section (SHS) and rectangular hollow section (RHS). The proposed beam-column stiffness reduction factor (tMN) accounts for the deleterious influence of material non-linearity, residual stresses and member out-of-straightness. The use of a GNA coupled with the proposed tMN eliminates the need for member buckling strength checks and thus, only cross-sectional strength checks are required.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-12-02
2020
2020-02-11
dc.type.none.fl_str_mv doctoral thesis
http://purl.org/coar/resource_type/c_db06
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/177806
https://dx.doi.org/10.5821/dissertation-2117-177806
url https://hdl.handle.net/2117/177806
https://dx.doi.org/10.5821/dissertation-2117-177806
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universitat Politècnica de Catalunya
publisher.none.fl_str_mv Universitat Politècnica de Catalunya
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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