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Conference Paper: Nonlinear multilevel analysis of reinforced concrete beams

TitleNonlinear multilevel analysis of reinforced concrete beams
Authors
KeywordsMultilevel analysis
Reinforced concrete beams
Sectional analysis
Stiffness degradation
Unloading
Issue Date2007
Citation
Proceedings Of The 11Th International Conference On Civil, Structural And Environmental Engineering Computing, Civil-Comp 2007, 2007 How to Cite?
AbstractA nonlinear multilevel analysis method for reinforced concrete beams whereby the members are divided into sub-elements and sectional analysis is utilised to evaluate stiffness degradation and strength deterioration is developed. When a reinforced concrete member is subjected to an increasing load, the critical section starts to crack and softens, whereas unloading may occur at the adjacent sections. In order to calculate the actual displacements of beams, it is necessary to obtain the stiffness of various discrete sections by sectional analysis. At sectional level, the secant stiffness is determined from moment-curvature relation, in which the curvature is evaluated based on both transverse displacements and section rotations of the member. Unloading and reloading behaviour of concrete and steel reinforcement is simulated. In carrying out multilevel analysis, in each increment step of displacement, secant iteration is performed to obtain the convergent solution satisfying equilibrium. Examples are included to demonstrate the applicability of the multilevel analysis in predicting the nonlinear load-deflection response of concrete beam with varying reinforcement ratios. © 2007 Civil-Comp Press.
Persistent Identifierhttp://hdl.handle.net/10722/111570
References

 

DC FieldValueLanguage
dc.contributor.authorLam, JYKen_HK
dc.contributor.authorNg, PLen_HK
dc.contributor.authorKwan, AKHen_HK
dc.date.accessioned2010-09-26T02:54:39Z-
dc.date.available2010-09-26T02:54:39Z-
dc.date.issued2007en_HK
dc.identifier.citationProceedings Of The 11Th International Conference On Civil, Structural And Environmental Engineering Computing, Civil-Comp 2007, 2007en_HK
dc.identifier.urihttp://hdl.handle.net/10722/111570-
dc.description.abstractA nonlinear multilevel analysis method for reinforced concrete beams whereby the members are divided into sub-elements and sectional analysis is utilised to evaluate stiffness degradation and strength deterioration is developed. When a reinforced concrete member is subjected to an increasing load, the critical section starts to crack and softens, whereas unloading may occur at the adjacent sections. In order to calculate the actual displacements of beams, it is necessary to obtain the stiffness of various discrete sections by sectional analysis. At sectional level, the secant stiffness is determined from moment-curvature relation, in which the curvature is evaluated based on both transverse displacements and section rotations of the member. Unloading and reloading behaviour of concrete and steel reinforcement is simulated. In carrying out multilevel analysis, in each increment step of displacement, secant iteration is performed to obtain the convergent solution satisfying equilibrium. Examples are included to demonstrate the applicability of the multilevel analysis in predicting the nonlinear load-deflection response of concrete beam with varying reinforcement ratios. © 2007 Civil-Comp Press.en_HK
dc.languageengen_HK
dc.relation.ispartofProceedings of the 11th International Conference on Civil, Structural and Environmental Engineering Computing, Civil-Comp 2007en_HK
dc.subjectMultilevel analysisen_HK
dc.subjectReinforced concrete beamsen_HK
dc.subjectSectional analysisen_HK
dc.subjectStiffness degradationen_HK
dc.subjectUnloadingen_HK
dc.titleNonlinear multilevel analysis of reinforced concrete beamsen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailKwan, AKH:khkwan@hkucc.hku.hken_HK
dc.identifier.authorityKwan, AKH=rp00127en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-80053411649en_HK
dc.identifier.hkuros152089en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80053411649&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.scopusauthoridLam, JYK=24831751200en_HK
dc.identifier.scopusauthoridNg, PL=15045284100en_HK
dc.identifier.scopusauthoridKwan, AKH=7101738204en_HK

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