Publication result detail

Uncertainties of material properties in nonlinear computer simulation

PUKL, R.; NOVÁK, D.; VOŘECHOVSKÝ, M.; BERGMEISTER, K.

Original Title

Uncertainties of material properties in nonlinear computer simulation

English Title

Uncertainties of material properties in nonlinear computer simulation

Type

Paper in proceedings (conference paper)

Original Abstract

Nonlinear finite element method and advanced stochastic package were coupled in order to account uncertainties, randomness and spatial variability of material properties in computer simulation of structural behaviour and failure. The nonlinear FE program ATENA contains advanced constitutive models for concrete based on damage mechanics, fracture mechanics and plasticity theories with smeared crack approach. The advanced stochastic simulation software FREET is employed for the stochastic treatment. New and updated (significantly improved) methods were developed and verified in the simulation of uncertainties, e.g. small-sample simulation of Monte carlo type Latin hypercube sampling for both random variables and random fields with focus on correlation control among variables, accurate representation of random fields based on spectral decomposition of covariance matrix and employing very small number of underlying random variables, hierarchical nonlinear material models etc.

English abstract

Nonlinear finite element method and advanced stochastic package were coupled in order to account uncertainties, randomness and spatial variability of material properties in computer simulation of structural behaviour and failure. The nonlinear FE program ATENA contains advanced constitutive models for concrete based on damage mechanics, fracture mechanics and plasticity theories with smeared crack approach. The advanced stochastic simulation software FREET is employed for the stochastic treatment. New and updated (significantly improved) methods were developed and verified in the simulation of uncertainties, e.g. small-sample simulation of Monte carlo type Latin hypercube sampling for both random variables and random fields with focus on correlation control among variables, accurate representation of random fields based on spectral decomposition of covariance matrix and employing very small number of underlying random variables, hierarchical nonlinear material models etc.

Keywords

Material properties, nonlinear computer simulation, FREET, random variables

Key words in English

Material properties, nonlinear computer simulation, FREET, random variables

Authors

PUKL, R.; NOVÁK, D.; VOŘECHOVSKÝ, M.; BERGMEISTER, K.

Released

20.10.2006

Location

Berlin, Germany

ISBN

3-00-019232-8

Book

International probabilistic Symposium

Pages from

127

Pages to

138

Pages count

12

BibTex

@inproceedings{BUT24196,
  author="Radomír {Pukl} and Drahomír {Novák} and Miroslav {Vořechovský} and Konrad {Bergmeister}",
  title="Uncertainties of material properties in nonlinear computer simulation",
  booktitle="International probabilistic Symposium",
  year="2006",
  pages="127--138",
  address="Berlin, Germany",
  isbn="3-00-019232-8"
}