Effectiveness of different types of antiburst reinforcements for achorage zones of post-tensioned concrete slabs

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Title Effectiveness of different types of antiburst reinforcements for achorage zones of post-tensioned concrete slabs
Author Chowdhury, Sanaul Huq; Loo, Yew-Chaye; Wallbank, Scott
Journal Name Revista Ciências Exatas
Year Published 2006
Place of publication Taubaté - SP - Brazil
Publisher Universidade de Taubate
Abstract A post-tensioned prestressed system basically consists of a high strength tendon or strand running through the length of the concrete structure. The strand is stressed using a hydraulic jack, the tensile stressing force of the strand is transferred into the concrete by the use of anchorages. One of the most critical aspects of post-tensioned construction, which is also necessary for the success of the system, is the “anchorage zone”. The relatively large compressive forces generated from the strand are applied to the concrete over a small area. For this reason steel reinforcement known as anti-burst is used in the anchorage zone to control cracking caused by tensile forces as a result of the tensioning. Eight 150 mm thick 400mm x 1000mm post-tensioned concrete slabs with varying types of anti-burst reinforcements and two different concrete strengths were designed and tested to failure. Pull out tests were conducted at up to 95% of the tendon's tensile strength to find out the most effective type of anti-burst reinforcement and the effect of variation in concrete strengths. The rectangular helices type was found to be the best performer while the higher concrete strength was the better.
Peer Reviewed Yes
Published Yes
Publisher URI http://periodicos.unitau.br/ojs-2.2/index.php/exatas/index
Alternative URI http://periodicos.unitau.br/ojs-2.2/index.php/exatas/article/view/394
Volume 12
Issue Number 2
Page from 161
Page to 167
ISSN 1516-2893
Date Accessioned 2007-12-07
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Structural Engineering
URI http://hdl.handle.net/10072/27621
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1a

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