Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma

Bibliographic Details
Main Author: Bordignon, Rodrigo
Publication Date: 2022
Format: Doctoral thesis
Language: por
Source: Manancial - Repositório Digital da UFSM
Download full: http://repositorio.ufsm.br/handle/1/25357
Summary: A predictor model of the non-linear moment-rotation relationship of semi-rigid connections steel beam-to-column with double web-angles is proposed by this study. This predictor model is based on a mathematical function of exponential format with two parameters in which the response variable expresses the value of the relative rotation beam-to-column from the predictor variable that corresponds to the bending moment acting on the connection, which is standardized by a dimensionless factor, defined in terms of three geometric design variables. Two data sets were formed from numerical analysis by the Finite Element Method of 162 connections. The adjustment parameters of the proposed model were obtained from the nonlinear regression of the data, using a mathematical optimization method (Simulated Annealing), in order to minimize the defined objective function. The values of the adjustment parameters of the model are given by equations in terms of the height of the pair of double webangles that form the connection, specifically for the surface roughness conditions represented by the slip coefficient 0.2 and 0.4. The proposed model is presented in a simple format and the value of rotational stiffness at any point of the moment-rotation curve can be obtained directly from its derivative. The moment-rotation curves predicted by the proposed exponential model present a satisfactory predictive capacity of the behavior of the connections, when compared to the data obtained by the numerical analysis. It was evidenced that the surface roughness conditions affect directly the behavior of the connections, so that the simulated connections with a slip coefficient 0.4 presented an increase of 21% in the initial stiffness value, when compared to the simulated ones with a slip coefficient 0.2.
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spelling 2022-07-15T14:52:53Z2022-07-15T14:52:53Z2022-03-31http://repositorio.ufsm.br/handle/1/25357A predictor model of the non-linear moment-rotation relationship of semi-rigid connections steel beam-to-column with double web-angles is proposed by this study. This predictor model is based on a mathematical function of exponential format with two parameters in which the response variable expresses the value of the relative rotation beam-to-column from the predictor variable that corresponds to the bending moment acting on the connection, which is standardized by a dimensionless factor, defined in terms of three geometric design variables. Two data sets were formed from numerical analysis by the Finite Element Method of 162 connections. The adjustment parameters of the proposed model were obtained from the nonlinear regression of the data, using a mathematical optimization method (Simulated Annealing), in order to minimize the defined objective function. The values of the adjustment parameters of the model are given by equations in terms of the height of the pair of double webangles that form the connection, specifically for the surface roughness conditions represented by the slip coefficient 0.2 and 0.4. The proposed model is presented in a simple format and the value of rotational stiffness at any point of the moment-rotation curve can be obtained directly from its derivative. The moment-rotation curves predicted by the proposed exponential model present a satisfactory predictive capacity of the behavior of the connections, when compared to the data obtained by the numerical analysis. It was evidenced that the surface roughness conditions affect directly the behavior of the connections, so that the simulated connections with a slip coefficient 0.4 presented an increase of 21% in the initial stiffness value, when compared to the simulated ones with a slip coefficient 0.2.Um modelo preditor da relação não linear momento-rotação de ligações semirrígidas parafusadas entre viga e coluna em aço com dupla cantoneira de alma é proposto por este estudo. Este modelo é baseado em uma função matemática de formato exponencial de dois parâmetros, em que a variável de resposta expressa o valor da rotação relativa entre a viga e a coluna, a partir da variável preditora que corresponde ao momento fletor padronizado por um fator adimensional, definido em termos de três variáveis geométricas de projeto. Dois conjuntos de dados foram formados a partir dos resultados da análise numérica pelo Método dos Elementos Finitos de 162 ligações. Os parâmetros de ajuste do modelo proposto são obtidos a partir da regressão não linear dos dados com o emprego de um método de otimização matemática (Simulated Annealing), a fim de minimizar a função-objetivo definida. Os valores dos parâmetros de ajuste do modelo são dados por equações em termos da altura do par de cantoneiras que forma a ligação, especificamente para as condições de rugosidade superficial representadas pelos coeficientes médios de atrito 0,2 e 0,4. O modelo proposto se apresenta em um formato simples e o valor da rigidez rotacional em qualquer ponto da curva momentorotação pode ser obtida diretamente por sua derivada. As curvas momento-rotação preditas pelo modelo exponencial proposto apresentam uma capacidade preditiva satisfatória do comportamento das ligações, quando comparadas aos dados obtidos pela análise numérica. Foi evidenciado que as condições de rugosidade superficial afetam diretamente o comportamento das ligações, de modo que as simuladas com coeficiente médio de atrito 0,4 apresentaram um aumento médio de 21% no valor da rigidez inicial, quando comparados às simuladas com coeficiente médio de atrito 0,2.porUniversidade Federal de Santa MariaCentro de TecnologiaPrograma de Pós-Graduação em Engenharia CivilUFSMBrasilEngenharia CivilAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessLigações semirrígidas em açoModelo momento-rotaçãoDupla cantoneira de almaOtimização matemáticaMétodo dos elementos finitosSteel semi-rigid connectionsMoment–rotation modelDouble web-angle connectionMathematical optimizationFinite element methodCNPQ::ENGENHARIAS::ENGENHARIA CIVILModelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de almaMoment-rotation model of bolted steel beam-to-column whit double web-angles connectionsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisKaminski Junior, Joãohttp://lattes.cnpq.br/8734131577465605Pravia, Zacarias Martin ChamberlainAlva, Gerson Moacyr SisniegasPinheiro, Marco Antonio SilvaRodriguez, Rene QuispeDeifeld, Telmo Egmar Camilohttp://lattes.cnpq.br/9832992246732286Bordignon, Rodrigo300100000003600600600600600600600600fb163aa3-1a40-4810-9cca-8f94eabee26c3575a36a-e0b6-4985-9bf6-e4a20aa11a0df7af6e97-2da5-42ea-8078-b5bde79787c8878d3391-0ae2-4aad-ab69-14161d8b3765025d3120-29a2-4c2c-8f8e-11cbb7db033f9f2c817f-c0dd-4e34-899d-e4fa3bfea508ea8318d7-3a28-4304-9171-46c445e67af3reponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALTES_PPGEC_2022_BORDIGNON_RODRIGO.pdfTES_PPGEC_2022_BORDIGNON_RODRIGO.pdfTeseapplication/pdf24846201http://repositorio.ufsm.br/bitstream/1/25357/1/TES_PPGEC_2022_BORDIGNON_RODRIGO.pdf0f0c1616220f45aa1d1cc09ab9c1b161MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8805http://repositorio.ufsm.br/bitstream/1/25357/2/license_rdf4460e5956bc1d1639be9ae6146a50347MD52LICENSElicense.txtlicense.txttext/plain; charset=utf-816http://repositorio.ufsm.br/bitstream/1/25357/3/license.txt6eeec7985884eb94336b41cc5308bf0fMD531/253572022-07-15 11:52:53.348oai:repositorio.ufsm.br:1/25357Q3JlYXRpdmUgQ29tbXVucw==Repositório Institucionalhttp://repositorio.ufsm.br/PUBhttp://repositorio.ufsm.br/oai/requestopendoar:39132022-07-15T14:52:53Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false
dc.title.por.fl_str_mv Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
dc.title.alternative.eng.fl_str_mv Moment-rotation model of bolted steel beam-to-column whit double web-angles connections
title Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
spellingShingle Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
Bordignon, Rodrigo
Ligações semirrígidas em aço
Modelo momento-rotação
Dupla cantoneira de alma
Otimização matemática
Método dos elementos finitos
Steel semi-rigid connections
Moment–rotation model
Double web-angle connection
Mathematical optimization
Finite element method
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL
title_short Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
title_full Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
title_fullStr Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
title_full_unstemmed Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
title_sort Modelo momento-rotação de ligações parafusadas entre viga e coluna em aço com dupla cantoneira de alma
author Bordignon, Rodrigo
author_facet Bordignon, Rodrigo
author_role author
dc.contributor.advisor1.fl_str_mv Kaminski Junior, João
dc.contributor.advisor1Lattes.fl_str_mv http://lattes.cnpq.br/8734131577465605
dc.contributor.advisor-co1.fl_str_mv Pravia, Zacarias Martin Chamberlain
dc.contributor.referee1.fl_str_mv Alva, Gerson Moacyr Sisniegas
dc.contributor.referee2.fl_str_mv Pinheiro, Marco Antonio Silva
dc.contributor.referee3.fl_str_mv Rodriguez, Rene Quispe
dc.contributor.referee4.fl_str_mv Deifeld, Telmo Egmar Camilo
dc.contributor.authorLattes.fl_str_mv http://lattes.cnpq.br/9832992246732286
dc.contributor.author.fl_str_mv Bordignon, Rodrigo
contributor_str_mv Kaminski Junior, João
Pravia, Zacarias Martin Chamberlain
Alva, Gerson Moacyr Sisniegas
Pinheiro, Marco Antonio Silva
Rodriguez, Rene Quispe
Deifeld, Telmo Egmar Camilo
dc.subject.por.fl_str_mv Ligações semirrígidas em aço
Modelo momento-rotação
Dupla cantoneira de alma
Otimização matemática
Método dos elementos finitos
topic Ligações semirrígidas em aço
Modelo momento-rotação
Dupla cantoneira de alma
Otimização matemática
Método dos elementos finitos
Steel semi-rigid connections
Moment–rotation model
Double web-angle connection
Mathematical optimization
Finite element method
CNPQ::ENGENHARIAS::ENGENHARIA CIVIL
dc.subject.eng.fl_str_mv Steel semi-rigid connections
Moment–rotation model
Double web-angle connection
Mathematical optimization
Finite element method
dc.subject.cnpq.fl_str_mv CNPQ::ENGENHARIAS::ENGENHARIA CIVIL
description A predictor model of the non-linear moment-rotation relationship of semi-rigid connections steel beam-to-column with double web-angles is proposed by this study. This predictor model is based on a mathematical function of exponential format with two parameters in which the response variable expresses the value of the relative rotation beam-to-column from the predictor variable that corresponds to the bending moment acting on the connection, which is standardized by a dimensionless factor, defined in terms of three geometric design variables. Two data sets were formed from numerical analysis by the Finite Element Method of 162 connections. The adjustment parameters of the proposed model were obtained from the nonlinear regression of the data, using a mathematical optimization method (Simulated Annealing), in order to minimize the defined objective function. The values of the adjustment parameters of the model are given by equations in terms of the height of the pair of double webangles that form the connection, specifically for the surface roughness conditions represented by the slip coefficient 0.2 and 0.4. The proposed model is presented in a simple format and the value of rotational stiffness at any point of the moment-rotation curve can be obtained directly from its derivative. The moment-rotation curves predicted by the proposed exponential model present a satisfactory predictive capacity of the behavior of the connections, when compared to the data obtained by the numerical analysis. It was evidenced that the surface roughness conditions affect directly the behavior of the connections, so that the simulated connections with a slip coefficient 0.4 presented an increase of 21% in the initial stiffness value, when compared to the simulated ones with a slip coefficient 0.2.
publishDate 2022
dc.date.accessioned.fl_str_mv 2022-07-15T14:52:53Z
dc.date.available.fl_str_mv 2022-07-15T14:52:53Z
dc.date.issued.fl_str_mv 2022-03-31
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rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
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dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
Centro de Tecnologia
dc.publisher.program.fl_str_mv Programa de Pós-Graduação em Engenharia Civil
dc.publisher.initials.fl_str_mv UFSM
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv Engenharia Civil
publisher.none.fl_str_mv Universidade Federal de Santa Maria
Centro de Tecnologia
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