Application of UHPC joints of concrete elements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00234137" target="_blank" >RIV/68407700:21110/15:00234137 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21610/15:00234137

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Application of UHPC joints of concrete elements

Popis výsledku v původním jazyce

Precast concrete elements are usually connected using joints filled with ordinary concrete. The joint must allow for a reliable transfer of tensile forces in steel reinforcement. If the joint is small the reinforcement must be connected by welding or by mechanical connectors. Welding of reinforcing steel is often not allowed and mechanical connectors may be expensive. If the joint is filled by ultra high performance concrete (UHPC), the tensile forces in steel reinforcement may be efficiently transferred. Extensive experimental research carried out at the CTU in Prague has proven that the anchorage length of the steel reinforcement and also that of prestressed steel in UHPC is significantly shorter than that in ordinary concrete. It allows for designing a very short overlaps of steel bars in UHPC. If the joint of precast elements is made of UHPC, it may be rather small and no welding or mechanical connection of steel is necessary. The joint may be produced easily and at reasonable costs. A series of experiments was designed and executed in order to evaluate the performance of joints subjected to shear and bending. The results of bond tests and the results of tests of joints will be presented in this paper.

Název v anglickém jazyce

Application of UHPC joints of concrete elements

Popis výsledku anglicky

Precast concrete elements are usually connected using joints filled with ordinary concrete. The joint must allow for a reliable transfer of tensile forces in steel reinforcement. If the joint is small the reinforcement must be connected by welding or by mechanical connectors. Welding of reinforcing steel is often not allowed and mechanical connectors may be expensive. If the joint is filled by ultra high performance concrete (UHPC), the tensile forces in steel reinforcement may be efficiently transferred. Extensive experimental research carried out at the CTU in Prague has proven that the anchorage length of the steel reinforcement and also that of prestressed steel in UHPC is significantly shorter than that in ordinary concrete. It allows for designing a very short overlaps of steel bars in UHPC. If the joint of precast elements is made of UHPC, it may be rather small and no welding or mechanical connection of steel is necessary. The joint may be produced easily and at reasonable costs. A series of experiments was designed and executed in order to evaluate the performance of joints subjected to shear and bending. The results of bond tests and the results of tests of joints will be presented in this paper.

Druh

D - Stať ve sborníku

CEP obor

JN - Stavebnictví

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020168" target="_blank" >TE01020168: Centrum pro efektivní a udržitelnou dopravní infrastrukturu (CESTI)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Fibre Concrete 2015 - Technology, Design, Application

ISBN

978-80-01-05683-7

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

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Název nakladatele

České vysoké učení technické v Praze, Fakulta stavební

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

10. 9. 2015

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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