Strengthening of railway bridges with UHPFRC overlay

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00366452" target="_blank" >RIV/68407700:21110/23:00366452 - 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

Strengthening of railway bridges with UHPFRC overlay

Popis výsledku v původním jazyce

In recent years, there has been considerable development of cementitious binder-based materials with exceptional mechanical and durability characteristics – so called Ultra High-Performance Fiber-Reinforced Concretes (UHPFRC). Thanks to their properties, these materials are suitable not only for new structures, details and connections, but also for repairs and strengthening of existing concrete structures. One of convenient methods is strengthening of structures with UHPFRC overlays, i.e. with a thin composite layer of UHPFRC interacting with the existing structure. This method can be used also for railway bridges, at which it is possible by this way to increase their load-bearing capacity in the longitudinal as well as in the transverse direction, strengthen connections of lateral cantilevers (cornices) to the bridge deck and also to increase protection of the deck surface against water etc. For a verfication in a laboratory, a part of a structure at its longitudinal edge with a precast cornice cantilever was chosen. The aim of these experiments is to verify the increase of the resistence of connections of lateral cantilevers to the deck and to verify technology of manufacture. So far, specimens were designed and manufactured and the first experiments has been carried out, verifying resistence of the original connections still without UHPFRC overlay.

Název v anglickém jazyce

Strengthening of railway bridges with UHPFRC overlay

Popis výsledku anglicky

In recent years, there has been considerable development of cementitious binder-based materials with exceptional mechanical and durability characteristics – so called Ultra High-Performance Fiber-Reinforced Concretes (UHPFRC). Thanks to their properties, these materials are suitable not only for new structures, details and connections, but also for repairs and strengthening of existing concrete structures. One of convenient methods is strengthening of structures with UHPFRC overlays, i.e. with a thin composite layer of UHPFRC interacting with the existing structure. This method can be used also for railway bridges, at which it is possible by this way to increase their load-bearing capacity in the longitudinal as well as in the transverse direction, strengthen connections of lateral cantilevers (cornices) to the bridge deck and also to increase protection of the deck surface against water etc. For a verfication in a laboratory, a part of a structure at its longitudinal edge with a precast cornice cantilever was chosen. The aim of these experiments is to verify the increase of the resistence of connections of lateral cantilevers to the deck and to verify technology of manufacture. So far, specimens were designed and manufactured and the first experiments has been carried out, verifying resistence of the original connections still without UHPFRC overlay.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Young Engineers Colloquium Dresden 2023

ISBN

978-3-85748-192-5

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

50-51

Název nakladatele

IABSE Colloqium

Místo vydání

Berlin

Místo konání akce

Dresden

Datum konání akce

30. 5. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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