The concept of fractured rock-mass modeling using DFN-based statistical volume elements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00376919" target="_blank" >RIV/68407700:21110/24:00376919 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

The concept of fractured rock-mass modeling using DFN-based statistical volume elements

Popis výsledku v původním jazyce

The overall mechanical response of a fractured rock mass is, to a large extent, affected by naturally occurring fractures that exhibit sizes from millimeters to kilometers. Thus, in analysis of underground structures, such as tunnels, it is required that the fractures’ influence on the stress and deformation state in the vicinity of the structure is taken into account. In the present work, we examine the applicability of the statistical volume element (SVE) approach to determining the apparent stiffness tensor of an equivalent continuum representa-tion of the fractured rock, which is then used in the framework of the finite element method. The equivalent continuum properties are determined by volume-averaging the effect of individual fractures that intersect the SVE, while the fractures are represented using the “parallel plate model”. Stochastically generated discrete fracture networks are used to represent the fractures’ geometry. Presently, we solve the problem linearly for an incremen-tal change of the stress state. An application of the concept is demonstrated on simulation of tunnel excavation.

Název v anglickém jazyce

The concept of fractured rock-mass modeling using DFN-based statistical volume elements

Popis výsledku anglicky

The overall mechanical response of a fractured rock mass is, to a large extent, affected by naturally occurring fractures that exhibit sizes from millimeters to kilometers. Thus, in analysis of underground structures, such as tunnels, it is required that the fractures’ influence on the stress and deformation state in the vicinity of the structure is taken into account. In the present work, we examine the applicability of the statistical volume element (SVE) approach to determining the apparent stiffness tensor of an equivalent continuum representa-tion of the fractured rock, which is then used in the framework of the finite element method. The equivalent continuum properties are determined by volume-averaging the effect of individual fractures that intersect the SVE, while the fractures are represented using the “parallel plate model”. Stochastically generated discrete fracture networks are used to represent the fractures’ geometry. Presently, we solve the problem linearly for an incremen-tal change of the stress state. An application of the concept is demonstrated on simulation of tunnel excavation.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

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 statě ve sborníku

NMM 2023 Nano & Macro Mechanics

ISBN

978-80-01-07378-0

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

48-54

Název nakladatele

ACTA Polytechnica CTU

Místo vydání

Prague

Místo konání akce

Praha

Datum konání akce

12. 9. 2024

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

—