Size Effect on Strength Statistics of Prenotched Quasibrittle Structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F24%3APU151168" target="_blank" >RIV/00216305:26110/24:PU151168 - isvavai.cz</a>

Výsledek na webu

<a href="https://ascelibrary.org/doi/10.1061/JENMDT.EMENG-7629" target="_blank" >https://ascelibrary.org/doi/10.1061/JENMDT.EMENG-7629</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1061/JENMDT.EMENG-7629" target="_blank" >10.1061/JENMDT.EMENG-7629</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Size Effect on Strength Statistics of Prenotched Quasibrittle Structures

Popis výsledku v původním jazyce

This paper presents a stochastic analysis of the size effect on the nominal strength of quasibrittle structures with a large preexisting notch. This type of scaling behavior has been extensively studied within a deterministic framework. Little attention is paid to stochastic analysis, which is essential for reliability-based analysis and design of engineering structures. Stochastic finite element simulations are performed to study the failure of geometrically similar beams of different sizes. The numerical analysis uses a continuum damage model, in which the tensile strength and fracture energy are modeled by homogeneous random fields. Different correlation lengths are considered as a parametric study. The analysis yields the size effects on the mean and coefficient of variation (CoV) of the nominal structural strength. It is shown that the size effect on the mean strength agrees well with the Bazant size effect model. The simulation predicts a strong size effect on the CoV of the nominal strength. Small-, intermediate-, and large-size asymptotes are derived analytically for the scaling behavior of the strength CoV. Based on these asymptotes, an approximate scaling equation is proposed for the CoV of nominal strength. The effect of the correlation length on the simulated failure behavior is discussed.

Název v anglickém jazyce

Size Effect on Strength Statistics of Prenotched Quasibrittle Structures

Popis výsledku anglicky

This paper presents a stochastic analysis of the size effect on the nominal strength of quasibrittle structures with a large preexisting notch. This type of scaling behavior has been extensively studied within a deterministic framework. Little attention is paid to stochastic analysis, which is essential for reliability-based analysis and design of engineering structures. Stochastic finite element simulations are performed to study the failure of geometrically similar beams of different sizes. The numerical analysis uses a continuum damage model, in which the tensile strength and fracture energy are modeled by homogeneous random fields. Different correlation lengths are considered as a parametric study. The analysis yields the size effects on the mean and coefficient of variation (CoV) of the nominal structural strength. It is shown that the size effect on the mean strength agrees well with the Bazant size effect model. The simulation predicts a strong size effect on the CoV of the nominal strength. Small-, intermediate-, and large-size asymptotes are derived analytically for the scaling behavior of the strength CoV. Based on these asymptotes, an approximate scaling equation is proposed for the CoV of nominal strength. The effect of the correlation length on the simulated failure behavior is discussed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20102 - Construction engineering, Municipal and structural engineering

Projekt

<a href="/cs/project/GF22-06684K" target="_blank" >GF22-06684K: Stochastická únava betonu řešená přístupy založenými na disipaci energie s ohledem na vzájemné působení časových a teplotních účinků</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Engineering Mechanics

ISSN

0733-9399

e-ISSN

1943-7889

Svazek periodika

150

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

„04024025-1“-„0402402-11“

Kód UT WoS článku

001202575400008

EID výsledku v databázi Scopus

2-s2.0-85189284328