Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis
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2021
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fib. International Federation for Structural Concrete
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Deflections are among the most complex aspects of reinforced concrete behavior.
Furthermore, deflection control is increasingly a governing criterion in
design, especially in the case of two-way members such as flat slabs or edgesupported
slabs. However, simple and theoretically sound and adequately verified
methods for calculating deflections of two-way reinforced concrete members
have been lacking. Therefore, in this study, a novel method is proposed
for deflection control of two-way slabs. The method is an extension of the
ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating
deflections between the uncracked and fully cracked state. As a basis,
the method uses elastic deflections that are obtained through linear elastic
analyses in finite element software. The elastic deflection is then adequately
transformed based on the properties of a representative section, to account for
cracking, shrinkage and creep according to a modified version of the... ζ-method.
Finally, the method is validated against available experimental results from literature,
obtaining satisfactory precision and accuracy. The method proposed
in this study aims at providing an easy-to-use tool for designers carrying out
deflection control of two-way reinforced concrete slabs.
Keywords:
deflection / design / edge-supported slab / FEM / flat slab / Model Code / serviceability / two-way slabSource:
Structural Concrete, 2021, 1-19Publisher:
- wileyonlinelibrary.com
- fib. International Federation for Structural Concrete
Institution/Community
GraFarTY - JOUR AU - Tošić, Nikola AU - Pecić, Nenad AU - Poliotti, Mauro AU - Marí, Antonio AU - Torres, Lluis AU - Dragaš, Jelena PY - 2021 UR - https://grafar.grf.bg.ac.rs/handle/123456789/2964 AB - Deflections are among the most complex aspects of reinforced concrete behavior. Furthermore, deflection control is increasingly a governing criterion in design, especially in the case of two-way members such as flat slabs or edgesupported slabs. However, simple and theoretically sound and adequately verified methods for calculating deflections of two-way reinforced concrete members have been lacking. Therefore, in this study, a novel method is proposed for deflection control of two-way slabs. The method is an extension of the ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating deflections between the uncracked and fully cracked state. As a basis, the method uses elastic deflections that are obtained through linear elastic analyses in finite element software. The elastic deflection is then adequately transformed based on the properties of a representative section, to account for cracking, shrinkage and creep according to a modified version of the ζ-method. Finally, the method is validated against available experimental results from literature, obtaining satisfactory precision and accuracy. The method proposed in this study aims at providing an easy-to-use tool for designers carrying out deflection control of two-way reinforced concrete slabs. PB - wileyonlinelibrary.com PB - fib. International Federation for Structural Concrete T2 - Structural Concrete T1 - Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis IS - 1-19 DO - 10.1002/suco.202000558 ER -
@article{ author = "Tošić, Nikola and Pecić, Nenad and Poliotti, Mauro and Marí, Antonio and Torres, Lluis and Dragaš, Jelena", year = "2021", abstract = "Deflections are among the most complex aspects of reinforced concrete behavior. Furthermore, deflection control is increasingly a governing criterion in design, especially in the case of two-way members such as flat slabs or edgesupported slabs. However, simple and theoretically sound and adequately verified methods for calculating deflections of two-way reinforced concrete members have been lacking. Therefore, in this study, a novel method is proposed for deflection control of two-way slabs. The method is an extension of the ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating deflections between the uncracked and fully cracked state. As a basis, the method uses elastic deflections that are obtained through linear elastic analyses in finite element software. The elastic deflection is then adequately transformed based on the properties of a representative section, to account for cracking, shrinkage and creep according to a modified version of the ζ-method. Finally, the method is validated against available experimental results from literature, obtaining satisfactory precision and accuracy. The method proposed in this study aims at providing an easy-to-use tool for designers carrying out deflection control of two-way reinforced concrete slabs.", publisher = "wileyonlinelibrary.com, fib. International Federation for Structural Concrete", journal = "Structural Concrete", title = "Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis", number = "1-19", doi = "10.1002/suco.202000558" }
Tošić, N., Pecić, N., Poliotti, M., Marí, A., Torres, L.,& Dragaš, J.. (2021). Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis. in Structural Concrete wileyonlinelibrary.com.(1-19). https://doi.org/10.1002/suco.202000558
Tošić N, Pecić N, Poliotti M, Marí A, Torres L, Dragaš J. Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis. in Structural Concrete. 2021;(1-19). doi:10.1002/suco.202000558 .
Tošić, Nikola, Pecić, Nenad, Poliotti, Mauro, Marí, Antonio, Torres, Lluis, Dragaš, Jelena, "Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis" in Structural Concrete, no. 1-19 (2021), https://doi.org/10.1002/suco.202000558 . .