Bonet Senach, JL.; Romero, ML.; Miguel Sosa, P. (2011). Effective flexural stiffness of slender reinforced concrete columns under axial forces and biaxial bending. Engineering Structures. 33:881-893. doi:10.1016/j.engstruct.2010.12.009
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/48928
Title:
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Effective flexural stiffness of slender reinforced concrete columns under axial forces and biaxial bending
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Author:
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Bonet Senach, José Luís
Romero, Manuel L.
Miguel Sosa, Pedro
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UPV Unit:
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Universitat Politècnica de València. Departamento de Ingeniería de la Construcción y de Proyectos de Ingeniería Civil - Departament d'Enginyeria de la Construcció i de Projectes d'Enginyeria Civil
Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures
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Issued date:
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Abstract:
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Most of the design codes (ACI-318-2008 and Euro Code-2-2004) propose the moment magnifier method in order to take into account the second order effect to design slender reinforced concrete columns. The accuracy of this ...[+]
Most of the design codes (ACI-318-2008 and Euro Code-2-2004) propose the moment magnifier method in order to take into account the second order effect to design slender reinforced concrete columns. The accuracy of this method depends on the effective flexural stiffness of the column. This paper proposes a new equation to obtain the effective stiffness EI of slender reinforced concrete columns. The expression is valid for any shape of cross-section, subjected to combined axial loads and biaxial bending, both for short-time and sustained loads, normal and high strength concretes, but it is only suitable for columns with equal effective buckling lengths in the two principal bending planes. The new equation extends the proposed EI equation in the "Biaxial bending moment magnifier method" by Bonet et al. (2004) [6], which is valid only for rectangular sections. The method was compared with 613 experimental tests from the literature and a good degree of accuracy was obtained. It was also compared with the design codes ACI-318 (08) and EC-2 (2004) improving the precision. The method is capable to verify and design with sufficient accuracy slender reinforced concrete columns in practical engineering design applications. © 2010 Elsevier Ltd.
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Subjects:
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Biaxial bending
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Columns
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Design
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Reinforced concrete
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Strength
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Axial forces
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Biaxial bending moments
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Buckling length
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Degree of accuracy
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Design codes
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Effective stiffness
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Experimental test
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Flexural stiffness
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High strength concretes
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Moment magnifier method
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Practical engineering
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Rectangular section
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Second order effect
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Slender reinforced concrete columns
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Sustained loads
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Bending (deformation)
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Columns (structural)
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Concrete buildings
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Concrete construction
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Stiffness
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Bending strength
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Accuracy assessment
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Bending
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Column
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Design method
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Flexure
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Loading
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Precision
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Copyrigths:
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Reserva de todos los derechos
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Source:
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Engineering Structures. (issn:
0141-0296
)
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DOI:
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10.1016/j.engstruct.2010.12.009
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Publisher:
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Elsevier
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Project ID:
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info:eu-repo/grantAgreement/MICINN//BIA2009-10207/ES/Diseño Con Criterios De Ductilidad De Uniones Soporte-Cimentacion En Elementos Prefabricados De Hormigon/
info:eu-repo/grantAgreement/MICINN//BIA2008-03734/ES/
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Thanks:
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The authors wish to express their sincere gratitude to the Spanish "Ministerio de Ciencia e Innovacion" for help provided through projects BIA2008-03734 and BIA2009-10207 and to the European Community with the Feder funds.[+]
The authors wish to express their sincere gratitude to the Spanish "Ministerio de Ciencia e Innovacion" for help provided through projects BIA2008-03734 and BIA2009-10207 and to the European Community with the Feder funds.
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Type:
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Artículo
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