Assessing Immediate and Time-Dependent Instantaneous Stiffness of Cracked Reinforced Concrete Beams Using Residual Cracks

Xu, T; Zhu, L; Castel, A; Gilbert, RI

Assessing Immediate and Time-Dependent Instantaneous Stiffness of Cracked Reinforced Concrete Beams Using Residual Cracks

Xu, T Zhu, L Castel, A

Gilbert, RI

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: Journal of Structural Engineering (United States), 2018, 144, (4)
Issue Date:: 2018-04-01

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Field	Value	Language
dc.contributor.author	Xu, T
dc.contributor.author	Zhu, L
dc.contributor.author	Castel, A https://orcid.org/0000-0003-1619-9643
dc.contributor.author	Gilbert, RI
dc.date.accessioned	2022-08-27T04:37:53Z
dc.date.available	2022-08-27T04:37:53Z
dc.date.issued	2018-04-01
dc.identifier.citation	Journal of Structural Engineering (United States), 2018, 144, (4)
dc.identifier.issn	0733-9445
dc.identifier.issn	1943-541X
dc.identifier.uri	http://hdl.handle.net/10453/160925
dc.description.abstract	Under normal in-service conditions, beams and slabs in reinforced concrete structures are usually cracked. Concrete cracking and steel-concrete bond damage lead to an irreversible reduction in the overall stiffness, thereby affecting the serviceability of reinforced concrete structures. The method proposed in this paper aims to assess both the steel-concrete bond damage and the bending stiffness of existing structures based on the cracking pattern observed in situ including the location of bending cracks, their spacing, and their width. The time-dependent effects of creep and shrinkage are also considered. Short-term and long-term experimental results obtained from tests on five reinforced concrete beams are used to evaluate the effectiveness of the method. For each beam, the cracking pattern and the width of cracks measured immediately after first loading and after a 6-month period of sustained loading are used to assess the immediate and time-dependent instantaneous stiffness of the beams. The stiffness and the load-deflection response determined using the proposed method are shown to agree well with experimental observations.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation	http://purl.org/au-research/grants/arc/DP140100529
dc.relation.ispartof	Journal of Structural Engineering (United States)
dc.relation.isbasedon	10.1061/(ASCE)ST.1943-541X.0002009
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering
dc.subject.classification	Civil Engineering
dc.title	Assessing Immediate and Time-Dependent Instantaneous Stiffness of Cracked Reinforced Concrete Beams Using Residual Cracks
dc.type	Journal Article
utslib.citation.volume	144
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials Engineering
utslib.for	0913 Mechanical Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-27T04:37:49Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	144
utslib.citation.issue	4

Abstract:

Under normal in-service conditions, beams and slabs in reinforced concrete structures are usually cracked. Concrete cracking and steel-concrete bond damage lead to an irreversible reduction in the overall stiffness, thereby affecting the serviceability of reinforced concrete structures. The method proposed in this paper aims to assess both the steel-concrete bond damage and the bending stiffness of existing structures based on the cracking pattern observed in situ including the location of bending cracks, their spacing, and their width. The time-dependent effects of creep and shrinkage are also considered. Short-term and long-term experimental results obtained from tests on five reinforced concrete beams are used to evaluate the effectiveness of the method. For each beam, the cracking pattern and the width of cracks measured immediately after first loading and after a 6-month period of sustained loading are used to assess the immediate and time-dependent instantaneous stiffness of the beams. The stiffness and the load-deflection response determined using the proposed method are shown to agree well with experimental observations.

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http://hdl.handle.net/10453/160925