Effect of Concrete Strength and Reinforcement on Time-Dependent Deflection of Posttensioned Slabs

Vakhshouri, B

Effect of Concrete Strength and Reinforcement on Time-Dependent Deflection of Posttensioned Slabs

Vakhshouri, B

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Publication Type:: Journal Article
Citation:: Practice Periodical on Structural Design and Construction, 2018, 23 (1)
Issue Date:: 2018-02-01

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Field	Value	Language
dc.contributor.author	Vakhshouri, B	en_US
dc.date.issued	2018-02-01	en_US
dc.identifier.citation	Practice Periodical on Structural Design and Construction, 2018, 23 (1)	en_US
dc.identifier.issn	1084-0680	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131762
dc.description.abstract	© 2017 American Society of Civil Engineers. Posttensioning is an effective construction method for structures with large spans, intensive loadings, and cost-efficiency considerations. The investigation developed a comprehensive understanding of how various reinforcement ratios and compressive strengths of concrete contribute to deflection of posttensioned two-way slabs. Furthermore, the numerical analysis compared the efficiency of various codes of practice to design the required reinforcement ratio in the presence of constant posttensioning tendons ratio and layout to provide the strength and deflection requirement. The interaction between the compressive strength-deflection and reinforcement ratio-deflection to find the optimum values of compressive strength and reinforcement ratio in a posttensioned two-way slab was also investigated. The finite-element model of a posttensioned 10 × 10 × 0.2-m (32.8 × 32.8 × 0.65-ft) two-way slab was analyzed and evaluated. The study confirmed the considerable effect of posttensioning to decrease the reinforcement ratio and deflection in a two-way slab. Also, a wide range of differences in design of a similar section of posttensioned concrete slab was observed by applying different codes of practice. The intensive effect of the concrete strength on the posttensioning design of slabs, especially in the lower ranges of compressive strength, was evident during the numerical analysis. Additionally, the reinforcement ratio shows a minor effect on the deflection of a posttensioned slab.	en_US
dc.relation.ispartof	Practice Periodical on Structural Design and Construction	en_US
dc.relation.isbasedon	10.1061/(ASCE)SC.1943-5576.0000353	en_US
dc.subject.classification	Civil Engineering	en_US
dc.title	Effect of Concrete Strength and Reinforcement on Time-Dependent Deflection of Posttensioned Slabs	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	23	en_US
utslib.for	0905 Civil 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
utslib.copyright.status	closed_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	23	en_US

Abstract:

© 2017 American Society of Civil Engineers. Posttensioning is an effective construction method for structures with large spans, intensive loadings, and cost-efficiency considerations. The investigation developed a comprehensive understanding of how various reinforcement ratios and compressive strengths of concrete contribute to deflection of posttensioned two-way slabs. Furthermore, the numerical analysis compared the efficiency of various codes of practice to design the required reinforcement ratio in the presence of constant posttensioning tendons ratio and layout to provide the strength and deflection requirement. The interaction between the compressive strength-deflection and reinforcement ratio-deflection to find the optimum values of compressive strength and reinforcement ratio in a posttensioned two-way slab was also investigated. The finite-element model of a posttensioned 10 × 10 × 0.2-m (32.8 × 32.8 × 0.65-ft) two-way slab was analyzed and evaluated. The study confirmed the considerable effect of posttensioning to decrease the reinforcement ratio and deflection in a two-way slab. Also, a wide range of differences in design of a similar section of posttensioned concrete slab was observed by applying different codes of practice. The intensive effect of the concrete strength on the posttensioning design of slabs, especially in the lower ranges of compressive strength, was evident during the numerical analysis. Additionally, the reinforcement ratio shows a minor effect on the deflection of a posttensioned slab.

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http://hdl.handle.net/10453/131762