Characterisation of Spatial Variability in Lattice Models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU125077" target="_blank" >RIV/00216305:26110/17:PU125077 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Characterisation of Spatial Variability in Lattice Models

Original language description

The paper aims to characterize different sources of spatial variability in lattice discrete particle models (LDPM) of heterogenous materials in order to support the hypotheses on a causal relationship between spatial variability, auto-correlation length of the random fields, type of spectral function and meso/micro-structure of the material. The associated microstructural features are mimicked by the proposed particle placement schemes for LDPM, which are no longer independent and random, but are correlated to initial random or gradient-based field. The study is based on high-dimensional Monte Carlo (MC) LDPM simulations of 3 classical concrete tests in which the inherent variability and production process are represented by the proposed particle placement schemes with varying parameters. Although the material property fields are kept constant, the captured functional form for the coefficient of variation of the load capacity and various power spectral parameters clearly supports the hypotheses on a causal relationship between spatial variability features and internal structure of the material. Furthermore, the different orientations of the gradient-based filed may be evaluated as a sensitivity to different casting directions, affecting not only scattering of the response, but also the mean values. This research represents an extreme case of high-dimensional MC problem and as such is yet limited to scientific clusters (supercomputers). As a proof of concept, however, the implications are important to the entire disciplin of structural reliability and safety due to the ability to obtain the functional form for mean values and coefficient of variation of response series and as such represents a fundamental concept for spatial variability based structural reliability.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20102 - Construction engineering, Municipal and structural engineering

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)

Publication year

2017

Confidentiality

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

Article name in the collection

COMUS17 - Eccomas Thematic Conference - COMPUTATIONAL MODELLING OF MULTI-UNCERTAINTY AND MULTI-SCALE PROBLEMS

ISBN

9788494690969

ISSN

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e-ISSN

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Number of pages

12

Pages from-to

1-12

Publisher name

ECCOMAS

Place of publication

Porto, Portugal

Event location

Vienna

Event date

Aug 6, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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