Detail publikačního výsledku

Stochastic lattice simulations of flexural failure in concrete beams

ELIÁŠ, J.; VOŘECHOVSKÝ, M.; BAŽANT, Z.

Originální název

Stochastic lattice simulations of flexural failure in concrete beams

Anglický název

Stochastic lattice simulations of flexural failure in concrete beams

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

The contribution employs meso-level discrete numerical model to approximate mechanics of concrete failure. The model represents the material by assembly of rigid-like particles interconnected by nonlinear bonds with strain softening. Spatial material randomness is introduced by varying the local meso-level strengths and fracture energies of inter-particle bonds. The variations are modeled using realizations of stationary autocorrelated random field abd studied for two different correlation lengths. The study is focused on maximal load and energy dissipation during the progresive failure. It is found that material fluctuations in notched beams do not influence the mean values of maximal load and dissipated energy, but they influence their variance. In the case of unnotched beams, the mean of maximal load decreases with decreasing correlation length of material properties; however, the coefficient of variation of the peak load increases.

Anglický abstrakt

The contribution employs meso-level discrete numerical model to approximate mechanics of concrete failure. The model represents the material by assembly of rigid-like particles interconnected by nonlinear bonds with strain softening. Spatial material randomness is introduced by varying the local meso-level strengths and fracture energies of inter-particle bonds. The variations are modeled using realizations of stationary autocorrelated random field abd studied for two different correlation lengths. The study is focused on maximal load and energy dissipation during the progresive failure. It is found that material fluctuations in notched beams do not influence the mean values of maximal load and dissipated energy, but they influence their variance. In the case of unnotched beams, the mean of maximal load decreases with decreasing correlation length of material properties; however, the coefficient of variation of the peak load increases.

Klíčová slova

Lattice-particle model, Spatial randomness, Bending, Fracture energy

Klíčová slova v angličtině

Lattice-particle model, Spatial randomness, Bending, Fracture energy

Autoři

ELIÁŠ, J.; VOŘECHOVSKÝ, M.; BAŽANT, Z.

Rok RIV

2014

Vydáno

11.03.2013

Místo

Toledo, Španělsko

ISBN

978-84-941004-0-6

Kniha

Fracture Mechanics of Concrete and Concrete Structures

Strany od

1

Strany do

12

Strany počet

12

BibTex

@inproceedings{BUT102236,
  author="Jan {Eliáš} and Miroslav {Vořechovský} and Zdeněk P. {Bažant}",
  title="Stochastic lattice simulations of flexural failure in concrete beams",
  booktitle="Fracture Mechanics of Concrete and Concrete Structures",
  year="2013",
  pages="1--12",
  address="Toledo, Španělsko",
  isbn="978-84-941004-0-6"
}