The concept of fractured rock-mass modeling using DFN-based statistical volume elements
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 d...
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CTU Central Library
2024-11-01
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| Series: | Acta Polytechnica CTU Proceedings |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/APP/article/view/10208 |
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| author | Martin Lebeda Petr Kabele |
| author_facet | Martin Lebeda Petr Kabele |
| author_sort | Martin Lebeda |
| collection | DOAJ |
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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 representation 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 incremental change of the stress state. An application of the concept is demonstrated on simulation of tunnel excavation.
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| format | Article |
| id | doaj-art-fdcf040d458048b982d2edfdc2d6fe71 |
| institution | Kabale University |
| issn | 2336-5382 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica CTU Proceedings |
| spelling | doaj-art-fdcf040d458048b982d2edfdc2d6fe712024-12-06T13:04:18ZengCTU Central LibraryActa Polytechnica CTU Proceedings2336-53822024-11-014910.14311/APP.2024.49.0048The concept of fractured rock-mass modeling using DFN-based statistical volume elementsMartin Lebeda0Petr Kabele1Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague, Czech RepublicCzech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague, Czech Republic 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 representation 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 incremental change of the stress state. An application of the concept is demonstrated on simulation of tunnel excavation. https://ojs.cvut.cz/ojs/index.php/APP/article/view/10208fractured rock massdiscrete fracture network (DFN)finite element method (FEM)statistical volume element (SVE) |
| spellingShingle | Martin Lebeda Petr Kabele The concept of fractured rock-mass modeling using DFN-based statistical volume elements Acta Polytechnica CTU Proceedings fractured rock mass discrete fracture network (DFN) finite element method (FEM) statistical volume element (SVE) |
| title | The concept of fractured rock-mass modeling using DFN-based statistical volume elements |
| title_full | The concept of fractured rock-mass modeling using DFN-based statistical volume elements |
| title_fullStr | The concept of fractured rock-mass modeling using DFN-based statistical volume elements |
| title_full_unstemmed | The concept of fractured rock-mass modeling using DFN-based statistical volume elements |
| title_short | The concept of fractured rock-mass modeling using DFN-based statistical volume elements |
| title_sort | concept of fractured rock mass modeling using dfn based statistical volume elements |
| topic | fractured rock mass discrete fracture network (DFN) finite element method (FEM) statistical volume element (SVE) |
| url | https://ojs.cvut.cz/ojs/index.php/APP/article/view/10208 |
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