Interplay of size effects in concrete specimens studied via computational stochastic fracture mechanics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F07%3APU72291" target="_blank" >RIV/00216305:26110/07:PU72291 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Interplay of size effects in concrete specimens studied via computational stochastic fracture mechanics

Original language description

We attempt the identification, study and modeling of possible sources of size effects in concrete structures acting both separately and together. We are particularly motivated by the interplay of several identified scaling lengths stemming from the material, boundary conditions and geometry. Methods of stochastic nonlinear fracture mechanics are used to model the well published results of direct tensile tests of dog-bone specimens with rotating boundary conditions. Firstly, the specimens are modeled using microplane material law to show that a large portion of the dependence of nominal strength on structural size can be explained deterministically. However, it is clear that more sources of size effect play a part, and we consider two of them. Namely, we model local material strength using an autocorrelated random field attempting to capture a statistical part of the complex size effect, scatter inclusive. In addition, the strength drop noticeable with small specimens which was obtained

Czech name

Vzájemná souhra vlivů velikosti tažených betonových nosníků studovaná pomocí nástrojů výpočtové stochastické lomové mechaniky

Czech description

Identifikace study and modeling of possible sources of size effects in concrete structures acting both separately and together. We are particularly motivated by the interplay of several identified scaling lengths stemming from the material, boundary conditions and geometry. Methods of stochastic nonlinear fracture mechanics are used to model the well published results of direct tensile tests of dog-bone specimens with rotating boundary conditions. Firstly, the specimens are modeled using microplane material law to show that a large portion of the dependence of nominal strength on structural size can be explained deterministically. However, it is clear that more sources of size effect play a part, and we consider two of them. Namely, we model local material strength using an autocorrelated random field attempting to capture a statistical part of the complex size effect, scatter inclusive. In addition, the strength drop noticeable with small specimens which was obtained in the experiment

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JM - Structural engineering

OECD FORD branch

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Project

<a href="/en/project/GP103%2F06%2FP086" target="_blank" >GP103/06/P086: Probabilistic nonlinear finite element method with h-adaptivity</a><br>

Continuities

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

Publication year

2007

Confidentiality

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

Name of the periodical

International Journal of Solids and Structures

ISSN

0020-7683

e-ISSN

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Volume of the periodical

44

Issue of the periodical within the volume

9

Country of publishing house

US - UNITED STATES

Number of pages

17

Pages from-to

2715-2731

UT code for WoS article

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EID of the result in the Scopus database

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