Numerical modeling of a beam with a hole for verification of the tensile strength

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27120%2F22%3A10246117" target="_blank" >RIV/61989100:27120/22:10246117 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0081663" target="_blank" >http://dx.doi.org/10.1063/5.0081663</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0081663" target="_blank" >10.1063/5.0081663</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical modeling of a beam with a hole for verification of the tensile strength

Popis výsledku v původním jazyce

The paper deals with numerical modeling simulating bending tests of fiber-reinforced concrete beams. Two variants of the beam measuring 150 x 150 x 700 mm were made. It was a variant of a beam with a hole in the middle and a beam without a hole. The study assumed that the tensile stress at the place above/below the hole is uniform and can be considered very close to axial tensile stress. Based on the four-point bending test and the force at the boundary of the first cracks, the stress in the lower fibers of the beam with a hole and without a hole was determined. The stress sizes in the lower fibers were subsequently verified by numerical models. Numerical models were performed in a variant solution, which differed in the size of the finite elements (10 and 30 mm) and the location of the supports (in the axis of the beam, on the lower edge of the beam). This numerical study verified the uniformity of the stress and therefore the magnitude of this stress can be considered as the tensile strength. The great advantage of the tensile strength determined in this way is the low complexity of testing because the principle of the test (specimen size, arrangement during the test) was maintained as in case of the standard tests. The advantage is also in determining tensile strength, which is directly based on the test results, without the use of a conversion function what is necessary in case of other bending tests.

Název v anglickém jazyce

Numerical modeling of a beam with a hole for verification of the tensile strength

Popis výsledku anglicky

The paper deals with numerical modeling simulating bending tests of fiber-reinforced concrete beams. Two variants of the beam measuring 150 x 150 x 700 mm were made. It was a variant of a beam with a hole in the middle and a beam without a hole. The study assumed that the tensile stress at the place above/below the hole is uniform and can be considered very close to axial tensile stress. Based on the four-point bending test and the force at the boundary of the first cracks, the stress in the lower fibers of the beam with a hole and without a hole was determined. The stress sizes in the lower fibers were subsequently verified by numerical models. Numerical models were performed in a variant solution, which differed in the size of the finite elements (10 and 30 mm) and the location of the supports (in the axis of the beam, on the lower edge of the beam). This numerical study verified the uniformity of the stress and therefore the magnitude of this stress can be considered as the tensile strength. The great advantage of the tensile strength determined in this way is the low complexity of testing because the principle of the test (specimen size, arrangement during the test) was maintained as in case of the standard tests. The advantage is also in determining tensile strength, which is directly based on the test results, without the use of a conversion function what is necessary in case of other bending tests.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

AIP Conference Proceedings. Volume 2425

ISBN

978-0-7354-4182-8

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

4

Strana od-do

1-4

Název nakladatele

AIP Publishing

Místo vydání

Melville

Místo konání akce

Rhodos

Datum konání akce

17. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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