Headed Studs in Anchor Zones of Post-Tensioned Slabs

Post-tensioned flat slabs are efficient structural components for office and multi-story apartment buildings. The most common installations comprise monostrand tendons that are placed in narrow bands near the column lines (banded) in one direction and uniformly distributed in the perpendicular direc...

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Bibliographic Details
Published inConcrete International Vol. 27; no. 4; pp. 45 - 50
Main Authors Dilger, Walter H, Ghali, Amin, Youakim, Samer A, Hammill, Neil L
Format Journal Article Trade Publication Article
LanguageEnglish
Published Farmington Hills American Concrete Institute 01.04.2005
Subjects
Concrete
Concrete research
Concrete slabs
Post-tensioning
Prestressed concrete
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Summary:Post-tensioned flat slabs are efficient structural components for office and multi-story apartment buildings. The most common installations comprise monostrand tendons that are placed in narrow bands near the column lines (banded) in one direction and uniformly distributed in the perpendicular direction. The anchor zones of banded tendons normally combine closely spaced anchors, hairpin bars, and transverse reinforcing. As shown in Fig. 1(a), this can lead to significant congestion. Using headed studs instead of conventional hairpin stirrups eliminates the congestion (Fig. 1 (b)). In this article, we review the analysis and design methods for anchor zones in concrete slabs with monostrand tendons. Further, we report test results for slab specimens reinforced with headed studs and compare our results with those from an earlier study that evaluated hairpin reinforcing.
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ISSN:0162-4075
1944-7388