Full-scale experimental testing of the blast resistance of HPFRC and UHPFRC bridge decks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39911100" target="_blank" >RIV/00216275:25310/17:39911100 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/17:00311485 RIV/60162694:G43__/17:00534920

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0950061817306645" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0950061817306645</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.conbuildmat.2017.04.054" target="_blank" >10.1016/j.conbuildmat.2017.04.054</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Full-scale experimental testing of the blast resistance of HPFRC and UHPFRC bridge decks

Popis výsledku v původním jazyce

Because of the current geopolitical situation, research on improving the resistance of the civil and transport infrastructure to blast or impact loads has gained considerable attention in recent years. This paper presents the results of full-scale blast experiments designed to characterize the resistance of steel-fiber reinforced concrete full-scale bridge decks subjected to near-field blast loading, and its dependence on the material properties of the concrete. The blast performance of reinforced concrete specimens increases with added high-performance steel fibers. An increase in fiber content and in compressive strength up to ultrahigh-performance fiber concrete (UHPFRC) further enhances its blast performance. An attempt was made to further increase the blast resistance of a concrete structure with the use of a basalt mesh. The UHPFRC specimen with a basalt mesh experienced a greater extent of internal damage than a regular UHPFRC specimen. However, the basalt mesh inserted into the concrete cover at the soffit of the UHPFRC specimen improved its blast performance, as expressed by the area of spalling and the volume of debris. This phenomenon was studied numerically, and it was proved that it is caused by the internal rebound of the shock wave, which causes a local increase in the stresses inside the specimen. The heterogeneity of the specimens, which is increased by an internal reinforcement or by a basalt mesh, converts the blast damage due to internal rebounds into layer delamination. The delamination of the concrete specimen can be very effective in dissipating the energy of the blast wave.

Název v anglickém jazyce

Full-scale experimental testing of the blast resistance of HPFRC and UHPFRC bridge decks

Popis výsledku anglicky

Because of the current geopolitical situation, research on improving the resistance of the civil and transport infrastructure to blast or impact loads has gained considerable attention in recent years. This paper presents the results of full-scale blast experiments designed to characterize the resistance of steel-fiber reinforced concrete full-scale bridge decks subjected to near-field blast loading, and its dependence on the material properties of the concrete. The blast performance of reinforced concrete specimens increases with added high-performance steel fibers. An increase in fiber content and in compressive strength up to ultrahigh-performance fiber concrete (UHPFRC) further enhances its blast performance. An attempt was made to further increase the blast resistance of a concrete structure with the use of a basalt mesh. The UHPFRC specimen with a basalt mesh experienced a greater extent of internal damage than a regular UHPFRC specimen. However, the basalt mesh inserted into the concrete cover at the soffit of the UHPFRC specimen improved its blast performance, as expressed by the area of spalling and the volume of debris. This phenomenon was studied numerically, and it was proved that it is caused by the internal rebound of the shock wave, which causes a local increase in the stresses inside the specimen. The heterogeneity of the specimens, which is increased by an internal reinforcement or by a basalt mesh, converts the blast damage due to internal rebounds into layer delamination. The delamination of the concrete specimen can be very effective in dissipating the energy of the blast wave.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Construction and Building Materials

ISSN

0950-0618

e-ISSN

—

Svazek periodika

145

Číslo periodika v rámci svazku

August

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

588-601

Kód UT WoS článku

000401876800061

EID výsledku v databázi Scopus

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