Modeling size effect of concrete structures with nonlinear stochastic fracture mechanics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F06%3APU63928" target="_blank" >RIV/00216305:26110/06:PU63928 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

čeština

Original language name

Modelování vlivu velikosti betonových konstrukcí pomocí nelineární stochastické lomové mechaniky

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 sev-eral identified scaling lengths stemming from the material, boundary conditions and geometry. Meth-ods 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 mod-eledusing microplane material law to show that a large portion of the dependence of nominal strength on structural size can be explained deterministically. Next, 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 experiments is explained by the presence of a weak surface layer of constant thickness

Czech name

Modelování vlivu velikosti betonových konstrukcí pomocí nelineární stochastické lomové mechaniky

Czech 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 sev-eral identified scaling lengths stemming from the material, boundary conditions and geometry. Meth-ods 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 mod-eledusing microplane material law to show that a large portion of the dependence of nominal strength on structural size can be explained deterministically. Next, 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 experiments is explained by the presence of a weak surface layer of constant thickness

Type

D - Article in proceedings

CEP classification

JN - Civil engineering

OECD FORD branch

—

Project

<a href="/en/project/1K04110" target="_blank" >1K04110: Statistical aspects of size effect influence on reliability of concrete structures</a><br>

Continuities

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

Publication year

2006

Confidentiality

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

Article name in the collection

Pravděpodobnost porušování konstrukcí

ISBN

80-214-3251-9

ISSN

—

e-ISSN

—

Number of pages

16

Pages from-to

269-284

Publisher name

Neuveden

Place of publication

Brno, ČR

Event location

VUT v Brně, Fakulta stavební, Veveří 331/95,

Event date

Oct 3, 2006

Type of event by nationality

CST - Celostátní akce

UT code for WoS article

—