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Article: Dynamic analysis of frames with material and geometric nonlinearities based on the semirigid technique

TitleDynamic analysis of frames with material and geometric nonlinearities based on the semirigid technique
Authors
KeywordsFrames
Geometric Nonlinearity
Material Nonlinearity
Nonlinear Dynamic Analysis
Plastic Hinges
Semirigid Technique
Issue Date2008
PublisherWorld Scientific Publishing Co Pte Ltd. The Journal's web site is located at http://www.worldscinet.com/ijssd/ijssd.shtml
Citation
International Journal Of Structural Stability And Dynamics, 2008, v. 8 n. 3, p. 415-438 How to Cite?
AbstractThis paper presents a method for nonlinear dynamic analysis of frames with material and geometric nonlinearities which is based on the semirigid technique. The plastic hinge that accounts for the material nonlinearity is modeled as a pseudo-semirigid connection with nonlinear hysteretic moment-curvature characteristics at the element ends. The stiffness matrix of a frame element with material and geometric nonlinearities is expressed as the sum of products of the standard stiffness matrix and the geometric stiffness matrix of the element, with their corresponding correction matrices based on the plasticity factors developed from the section flexural stiffness at the plastic hinge locations. The combined stress yield condition is used for the force state determination of plastic hinges, and force equilibrium iterations and geometry updating for frames are carried out in every time step. When the key parameters of a structure are updated in a time step, the time step is split up into substeps to ensure accuracy while keeping the computations to a reasonable amount. The plastic rotation history can be calculated directly or in an approximate indirect way. The method is computationally efficient and it needs no additional connection elements, which makes it convenient for incorporation into existing linear dynamic analysis programs. Besides, the method can handle accurately and efficiently the dynamic analysis of nonlinear frames using relatively large time steps in conjunction with time step subdivision to cope with key parameter changes. A portal frame is used to verify the correctness of the proposed method. A more complicated five-story frame is used to illustrate the applicability and performance of the proposed method. © 2008 World Scientific Publishing Company.
Persistent Identifierhttp://hdl.handle.net/10722/150465
ISSN
2015 Impact Factor: 1.028
2015 SCImago Journal Rankings: 0.613
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAu, FTKen_US
dc.contributor.authorYan, ZHen_US
dc.date.accessioned2012-06-26T06:04:57Z-
dc.date.available2012-06-26T06:04:57Z-
dc.date.issued2008en_US
dc.identifier.citationInternational Journal Of Structural Stability And Dynamics, 2008, v. 8 n. 3, p. 415-438en_US
dc.identifier.issn0219-4554en_US
dc.identifier.urihttp://hdl.handle.net/10722/150465-
dc.description.abstractThis paper presents a method for nonlinear dynamic analysis of frames with material and geometric nonlinearities which is based on the semirigid technique. The plastic hinge that accounts for the material nonlinearity is modeled as a pseudo-semirigid connection with nonlinear hysteretic moment-curvature characteristics at the element ends. The stiffness matrix of a frame element with material and geometric nonlinearities is expressed as the sum of products of the standard stiffness matrix and the geometric stiffness matrix of the element, with their corresponding correction matrices based on the plasticity factors developed from the section flexural stiffness at the plastic hinge locations. The combined stress yield condition is used for the force state determination of plastic hinges, and force equilibrium iterations and geometry updating for frames are carried out in every time step. When the key parameters of a structure are updated in a time step, the time step is split up into substeps to ensure accuracy while keeping the computations to a reasonable amount. The plastic rotation history can be calculated directly or in an approximate indirect way. The method is computationally efficient and it needs no additional connection elements, which makes it convenient for incorporation into existing linear dynamic analysis programs. Besides, the method can handle accurately and efficiently the dynamic analysis of nonlinear frames using relatively large time steps in conjunction with time step subdivision to cope with key parameter changes. A portal frame is used to verify the correctness of the proposed method. A more complicated five-story frame is used to illustrate the applicability and performance of the proposed method. © 2008 World Scientific Publishing Company.en_US
dc.languageengen_US
dc.publisherWorld Scientific Publishing Co Pte Ltd. The Journal's web site is located at http://www.worldscinet.com/ijssd/ijssd.shtmlen_US
dc.relation.ispartofInternational Journal of Structural Stability and Dynamicsen_US
dc.subjectFramesen_US
dc.subjectGeometric Nonlinearityen_US
dc.subjectMaterial Nonlinearityen_US
dc.subjectNonlinear Dynamic Analysisen_US
dc.subjectPlastic Hingesen_US
dc.subjectSemirigid Techniqueen_US
dc.titleDynamic analysis of frames with material and geometric nonlinearities based on the semirigid techniqueen_US
dc.typeArticleen_US
dc.identifier.emailAu, FTK:francis.au@hku.hken_US
dc.identifier.authorityAu, FTK=rp00083en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1142/S0219455408002727en_US
dc.identifier.scopuseid_2-s2.0-49449107504en_US
dc.identifier.hkuros158936-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-49449107504&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume8en_US
dc.identifier.issue3en_US
dc.identifier.spage415en_US
dc.identifier.epage438en_US
dc.identifier.isiWOS:000258301600003-
dc.publisher.placeSingaporeen_US
dc.identifier.scopusauthoridAu, FTK=7005204072en_US
dc.identifier.scopusauthoridYan, ZH=7402519416en_US

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