Response scatter control for discrete element models
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU136379" target="_blank" >RIV/00216305:26110/18:PU136379 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1201/9781315182964-63" target="_blank" >http://dx.doi.org/10.1201/9781315182964-63</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1201/9781315182964-63" target="_blank" >10.1201/9781315182964-63</a>
Alternative languages
Result language
angličtina
Original language name
Response scatter control for discrete element models
Original language description
The so-called Lattice Discrete Particle Model (LDPM) naturally accounts for material heterogeneity by random particle placement and size, which is also constrained by a grading curve. This approach captures most microstructural effects of concrete very well, when compared to the continuum framework, however introducing higher order spatial variability enables to control and interpret the response scatter. This paper addresses the effects of various choices of spatially variable material property fields, such as random field described by power spectral functions or gradient based fields, and particle placement schemes, such as those derived from governing random or gradient based fields, in order to account for inherent variability and production processes of several classical concrete tests. These are e.g. cylinder and cube compression test, and unnotched three point bending test. As a consequence, the lattice models become sensitive to a particular choice of spatially variable material property fields and particular particle placement concept, which is no longer independent and random, and the scattering of the response can thus be associated with the physical meaning of an auto-correlation length and particular forms of the spectral function. In particular, the non-monotonous relationship between statistical characteristics of the response, such as the coefficient of variation of the load capacity, and spatial correlation structures, such as power spectral parameters, clearly support the hypotheses on causal relationship between spatial variability, auto-correlation length of the random fields, type of spectral function and meso/micro-structure of the material. By imposing correlated spatial variability the consistency and realism of the LDPM stochastic framework may dramatically increase if objective physical reference for the governing random field and correlation length is established. Since this represents a rather extreme case of high-dimensional problem, sim
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
<a href="/en/project/LO1408" target="_blank" >LO1408: AdMaS UP – Advanced Building Materials, Structures and Technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Computational Modelling of Concrete Structures
ISBN
978-1-315-18296-4
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
517-524
Publisher name
CRC Press/Balkema
Place of publication
Neuveden
Event location
Bad Hofgastein
Event date
Feb 26, 2018
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000461335800063