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Original Articles

The influence of prestress losses on the anchorage zone of prestressed concrete member

ĮTEMPTŲJŲ GELŽBETONINIŲ ELEMENTŲ ĮTEMPIŲ NUOSTOLIŲ ĮTAKA INKARAVIMO ZONAI

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Pages 25-32 | Received 15 Sep 2013, Accepted 20 Apr 2014, Published online: 29 Sep 2014
 

Abstract

Article briefly discusses the factors affecting bond between concrete and reinforcement of prestressed concrete member. Behavior of prestressed concrete member during release of reinforcement is discussed. Comparative analysis of equations, which describes relation between strand draw-in and transfer length, is presented. Article analyses distribution of loss of prestress at the anchorage zone of prestressed concrete member. Estimation of rational position of strands at the anchorage zone of flexural prestressed concrete member was performed. Influence of constant and linearly variable stress distribution at the end of the strand and member cross-section hight on the position of the reinforcement at the member crosssection is analysed.

Santrauka

Straipsnyje trumpai aptariami įtemptųjų gelžbetoninių konstrukcijų sukibimą tarp betono ir armatūros lemiantys veiksniai. Aprašoma įtemptojo gelžbetoninio elemento elgsena atleidžiant armatūrą. Pateikiama kitų autorių eksperimentiniais tyrimais nustatytų priklausomybių tarp lynų praslydimo ir įtempių perdavimo ilgio lyginamoji analizė. Straipsnyje analizuojamas įtempių nuostolių pasiskirstymas įtemptojo gelžbetoninio elemento inkaravimo zonoje, apskaičiuota racionali įtemptojo lenkiamojo gelžbetoninio elemento lynų padėtis inkaravimo zonoje. Analizuojama, kokią įtaką lynų padėčiai elemento skerspjūvyje daro nuolatinis ir kintamas įtempių pasiskirstymas lynų galuose bei elemento skerspjūvio aukštis.

Additional information

Notes on contributors

Aidas Jokūbaitis

Aidas JOKŪBAITIS. PhD student at the Department of Reinforced Concrete and Masonry Structures,Vilnius Gediminas Technical University (VGTU). Research interests: mechanics of reinforced and prestressed concrete structures.

Juozas Valivonis

Juozas VALIVONIS. Doctor, Professor at the Department of Reinforced Concrete and Masonry Structures, Vilnius Gediminas Technical University (VGTU). Author of more than 55 publications. Research interests: theory of reinforced concrete behaviour, composite structures, reinforced concrete bridges.

Adomas Zubrus

Adomas ZUBRUS. BSc (Civil Engineering) at Vilnius Gediminas Technical University (VGTU). Research interests: mechanics of voided biaxial hollow core slabs.

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