Partial-interaction short term serviceability deflection of RC beams

Visintin, P; Oehlers, DJ; Muhamad, R; Wu, C

Partial-interaction short term serviceability deflection of RC beams

Visintin, P Oehlers, DJ Muhamad, R Wu, C

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Publication Type:: Journal Article
Citation:: Engineering Structures, 2013, 56 pp. 993 - 1006
Issue Date:: 2013-11-01

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Field	Value	Language
dc.contributor.author	Visintin, P	en_US
dc.contributor.author	Oehlers, DJ	en_US
dc.contributor.author	Muhamad, R	en_US
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934	en_US
dc.date.issued	2013-11-01	en_US
dc.identifier.citation	Engineering Structures, 2013, 56 pp. 993 - 1006	en_US
dc.identifier.issn	0141-0296	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117524
dc.description.abstract	A widely accepted approach for quantifying the serviceability short term deflection of RC beams is to use some combination of the flexural rigidities of the uncracked (EIfi-uncr) and cracked (EIfi-cr) sections that are obtained from a full-interaction analysis of transformed sections; a full-interaction analysis implies that there is no slip between the reinforcement and concrete. The combination of EIfi-uncr and EIfi-cr, that is the effective flexural rigidity (EIeff) to be used for calculating the deflection, has to be determined purely from testing. In this paper partial-interaction theory, which allows for slip between the reinforcement and concrete and consequently the bond-slip characteristics, is used to determine the partial-interaction flexural rigidity of a cracked section (EIpi-cr). It is shown that: by replacing the cracked section EIfi-cr with EIpi-cr obviates the need to determine EIeff directly from testing; the replacement of EIfi-cr by EIpi-cr allows closed form solutions to be derived for EIeff and also allows for the distinction between the formation of primary and secondary cracks. The partial interaction approach also provides a way of determining, through mechanics, the minimum crack spacing and hence can be used to study the random component of cracking and its influence on member deflection. The partial-interaction flexural rigidity should be a convenient tool for not only refining existing deflection procedures but also for quantifying the deflection of RC beams with new types of reinforcement and new types of bond, in particular those associated with FRP reinforced members. © 2013 Elsevier Ltd.	en_US
dc.relation.ispartof	Engineering Structures	en_US
dc.relation.isbasedon	10.1016/j.engstruct.2013.06.021	en_US
dc.subject.classification	Civil Engineering	en_US
dc.title	Partial-interaction short term serviceability deflection of RC beams	en_US
dc.type	Journal Article
utslib.citation.volume	56	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	56	en_US

Abstract:

A widely accepted approach for quantifying the serviceability short term deflection of RC beams is to use some combination of the flexural rigidities of the uncracked (EIfi-uncr) and cracked (EIfi-cr) sections that are obtained from a full-interaction analysis of transformed sections; a full-interaction analysis implies that there is no slip between the reinforcement and concrete. The combination of EIfi-uncr and EIfi-cr, that is the effective flexural rigidity (EIeff) to be used for calculating the deflection, has to be determined purely from testing. In this paper partial-interaction theory, which allows for slip between the reinforcement and concrete and consequently the bond-slip characteristics, is used to determine the partial-interaction flexural rigidity of a cracked section (EIpi-cr). It is shown that: by replacing the cracked section EIfi-cr with EIpi-cr obviates the need to determine EIeff directly from testing; the replacement of EIfi-cr by EIpi-cr allows closed form solutions to be derived for EIeff and also allows for the distinction between the formation of primary and secondary cracks. The partial interaction approach also provides a way of determining, through mechanics, the minimum crack spacing and hence can be used to study the random component of cracking and its influence on member deflection. The partial-interaction flexural rigidity should be a convenient tool for not only refining existing deflection procedures but also for quantifying the deflection of RC beams with new types of reinforcement and new types of bond, in particular those associated with FRP reinforced members. © 2013 Elsevier Ltd.

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http://hdl.handle.net/10453/117524