Analysis of tunnel excavation based on linear DFN-FEM modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00363218" target="_blank" >RIV/68407700:21110/23:00363218 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.14311/APP.2023.40.0061" target="_blank" >https://doi.org/10.14311/APP.2023.40.0061</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/APP.2023.40.0061" target="_blank" >10.14311/APP.2023.40.0061</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of tunnel excavation based on linear DFN-FEM modelling

Popis výsledku v původním jazyce

Simulations of tunnel excavations have to take into account the natural occurrence of joints and faults in the surrounding rock mass, which dominantly control its mechanical re-sponse. In this paper, we present work in progress toward 3D finite element analysis of excavation using equivalent rock-mass properties derived from stochastically generated dis-crete fracture networks (DFNs). To this end, the averaging scheme proposed by Oda et al. [1] is used. Presently, we solve the problem linearly for an incremental change of the stress state. The fracture’s stiffness is assumed to depend on the initial normal stress acting in direction normal to it. However, within the solved incremental step, we assume the fracture’s stiffness to be constant. This assumption is acceptable for small stress changes. Since the fractures repre-sented in the DFN model have preferred directions, the equivalent stiffness is anisotropic.

Název v anglickém jazyce

Analysis of tunnel excavation based on linear DFN-FEM modelling

Popis výsledku anglicky

Simulations of tunnel excavations have to take into account the natural occurrence of joints and faults in the surrounding rock mass, which dominantly control its mechanical re-sponse. In this paper, we present work in progress toward 3D finite element analysis of excavation using equivalent rock-mass properties derived from stochastically generated dis-crete fracture networks (DFNs). To this end, the averaging scheme proposed by Oda et al. [1] is used. Presently, we solve the problem linearly for an incremental change of the stress state. The fracture’s stiffness is assumed to depend on the initial normal stress acting in direction normal to it. However, within the solved incremental step, we assume the fracture’s stiffness to be constant. This assumption is acceptable for small stress changes. Since the fractures repre-sented in the DFN model have preferred directions, the equivalent stiffness is anisotropic.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

NMM 2022 Nano & Macro Mechanics

ISBN

978-80-01-07186-1

ISSN

2336-5382

e-ISSN

2336-5382

Počet stran výsledku

8

Strana od-do

61-68

Název nakladatele

České vysoké učení technické v Praze

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

15. 9. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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