Summary of the Test Results of Short-Term and Long-Term Loading of Prestressed I-Beams Made of Ultra-High Performance Concrete

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F15%3A00327808" target="_blank" >RIV/68407700:21610/15:00327808 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Summary of the Test Results of Short-Term and Long-Term Loading of Prestressed I-Beams Made of Ultra-High Performance Concrete

Popis výsledku v původním jazyce

This paper presents a summary of the test results of a short-term and long-term loading of a prestressed I-beams made of ultra-high performance concrete. The prestressed beams are intended and designed to replace a steel HEB beams in construction of railway bridges with fully concreted height of the beams. The advantage of these types of structures lies in their having a low construction height. The prestressed I-beams are made of UHPC with dispersed steel fibres and reinforced by prestressing cables in the bottom flange. This paper presents a computer and experimental analysis of the loading of UHPC prestressed I-beams. For the purpose of the short-term loading, three specimens of 7 m span and two specimens of 12 m span were made. The specimens were subsequently tested in the laboratory in four-point bending tests. The paper presents the process and results of the experiments and a comparison of failure modes of the beams of different spans. The paper presents also long-term monitoring of two specimens of 12 m span beams. Simultaneously with the experiments, computer analyses were created in which optimization of the material and geometric parameters of the beams were carried out. The paper demonstrates the correspondence of the experimental and computer-simulated load test results. This research is supported by grant GACR 104/15-22670S Experimental and numerical analysis of bond behaviour between steel reinforcement and ultra-high performance concrete.

Název v anglickém jazyce

Summary of the Test Results of Short-Term and Long-Term Loading of Prestressed I-Beams Made of Ultra-High Performance Concrete

Popis výsledku anglicky

This paper presents a summary of the test results of a short-term and long-term loading of a prestressed I-beams made of ultra-high performance concrete. The prestressed beams are intended and designed to replace a steel HEB beams in construction of railway bridges with fully concreted height of the beams. The advantage of these types of structures lies in their having a low construction height. The prestressed I-beams are made of UHPC with dispersed steel fibres and reinforced by prestressing cables in the bottom flange. This paper presents a computer and experimental analysis of the loading of UHPC prestressed I-beams. For the purpose of the short-term loading, three specimens of 7 m span and two specimens of 12 m span were made. The specimens were subsequently tested in the laboratory in four-point bending tests. The paper presents the process and results of the experiments and a comparison of failure modes of the beams of different spans. The paper presents also long-term monitoring of two specimens of 12 m span beams. Simultaneously with the experiments, computer analyses were created in which optimization of the material and geometric parameters of the beams were carried out. The paper demonstrates the correspondence of the experimental and computer-simulated load test results. This research is supported by grant GACR 104/15-22670S Experimental and numerical analysis of bond behaviour between steel reinforcement and ultra-high performance concrete.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA15-22670S" target="_blank" >GA15-22670S: Experimentální a numerická analýza soudržnosti kovové výztuže s ultra vysokohodnotným betonem (UHPC)</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

Proceedings of IABSE Conference Geneva 2015, Structural Engineering: Providing Solutions to Global Challenges

ISBN

978-3-85748-140-6

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

1559-1565

Název nakladatele

IABSE

Místo vydání

Zürich

Místo konání akce

Geneve

Datum konání akce

23. 9. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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