Numerical assessment of the response of a heterogeneous concrete-based composite bridge deck to a near field explosion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00342933" target="_blank" >RIV/68407700:21110/20:00342933 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.engstruct.2020.111206" target="_blank" >https://doi.org/10.1016/j.engstruct.2020.111206</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.engstruct.2020.111206" target="_blank" >10.1016/j.engstruct.2020.111206</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical assessment of the response of a heterogeneous concrete-based composite bridge deck to a near field explosion

Popis výsledku v původním jazyce

This paper reports on numerical assessment of the blast response of a heterogeneous composite structure using LS-DYNA solver. There experimentally observed effect of heterogeneity on the overall response of the structure is numerically assessed. Multiple approaches to the introduction of material heterogeneity are proposed, modelled and tested. The numerical results are confronted with the authors’ original experimental program on a full-scale concrete structure subjected to a near field explosion. Tests were carried out on a total of three specimens. All the specimens were subjected to the same close-in blast loading from 25 kg TNT charges placed on steel chairs in the middle of each slab. The chairs provided 450 mm standoff from the top surface of the slab. Two of the analyzed specimens were reinforced concrete slabs 6 m in length, 1.5 m in width and 0.3 m in thickness. The first specimen contained basalt fiber meshes in multiple layers along the depth of the specimen. The second specimen contained two layers of recycled textile sheets 100 mm in total thickness. The third specimen was a commercial hollow-core precast prestressed panel 6 m in length, 1.2 m in width and 0.32 m in thickness. The paper aims to verify and explain the experimental findings. It was numerically proved that the highly heterogeneous concrete-based composite bridge decks consume the blast energy by layer delamination in the pre-determined damage zones. The findings are supported by PDV measurements.

Název v anglickém jazyce

Numerical assessment of the response of a heterogeneous concrete-based composite bridge deck to a near field explosion

Popis výsledku anglicky

This paper reports on numerical assessment of the blast response of a heterogeneous composite structure using LS-DYNA solver. There experimentally observed effect of heterogeneity on the overall response of the structure is numerically assessed. Multiple approaches to the introduction of material heterogeneity are proposed, modelled and tested. The numerical results are confronted with the authors’ original experimental program on a full-scale concrete structure subjected to a near field explosion. Tests were carried out on a total of three specimens. All the specimens were subjected to the same close-in blast loading from 25 kg TNT charges placed on steel chairs in the middle of each slab. The chairs provided 450 mm standoff from the top surface of the slab. Two of the analyzed specimens were reinforced concrete slabs 6 m in length, 1.5 m in width and 0.3 m in thickness. The first specimen contained basalt fiber meshes in multiple layers along the depth of the specimen. The second specimen contained two layers of recycled textile sheets 100 mm in total thickness. The third specimen was a commercial hollow-core precast prestressed panel 6 m in length, 1.2 m in width and 0.32 m in thickness. The paper aims to verify and explain the experimental findings. It was numerically proved that the highly heterogeneous concrete-based composite bridge decks consume the blast energy by layer delamination in the pre-determined damage zones. The findings are supported by PDV measurements.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-23067S" target="_blank" >GA17-23067S: Charakterizace chování betonu vystaveného výbuchu a následnému požáru</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Engineering Structures

ISSN

0141-0296

e-ISSN

1873-7323

Svazek periodika

225

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85090361197