Publication detail

Simulations of Concrete Fracture at Various Strain Rates: Parametric Study

KVĚTOŇ, J. ELIÁŠ, J.

Original Title

Simulations of Concrete Fracture at Various Strain Rates: Parametric Study

Type

conference paper

Language

English

Original Abstract

Concrete fracture can be simulated in static regime, however, it is a dynamical process. For very slow loading rates, the kinetic energy is negligible compared to the energy dissipated by fracturing, and the influence of inertia can be neglected. In all other cases, neglecting the influence of inertia forces can lead to improper results. With increasing loading rate, increase in strength and energy dissipation as well as changes in crack pattern can be observed. The contribution presents dynamical simulations of experiments on concrete specimens under various displacement rates, from very slow, quasi-static, to high displacement rates. The simulations are calculated using discrete particle model, the material is represented by a system of interconnected ideally rigid polyhedral particles. The solution of equations of motion is calculated using implicit time integration Newmark scheme. The constitutive behavior of the material is strain rate independent. For high strain rates the influence of inertia forces dominates and is mainly responsible for increase in loading forces as well as for change in the crack pattern and crack branching. The results obtained with the model are compared to experimental data from literature.

Keywords

concrete fracture, discrete model, dynamic, strain rate, inertia

Authors

KVĚTOŇ, J.; ELIÁŠ, J.

Released

15. 6. 2017

Publisher

National Technical University of Athens

Location

Rhodos, Řecko

ISBN

978-618-82844-1-8

Book

Computational Structural Dynamics and Earthquake Engineering

Edition

2

Pages from

4847

Pages to

4856

Pages count

10

URL

https://files.eccomasproceedia.org/papers/compdyn-2017/17557.pdf?mtime=20171002111216

BibTex

@inproceedings{BUT141117,
  author="Josef {Květoň} and Jan {Eliáš}",
  title="Simulations of Concrete Fracture at Various Strain Rates: Parametric Study",
  booktitle="Computational Structural Dynamics and Earthquake Engineering",
  year="2017",
  series="2",
  pages="4847--4856",
  publisher="National Technical University of Athens",
  address="Rhodos, Řecko",
  doi="10.7712/120117.5766.17557",
  isbn="978-618-82844-1-8",
  url="https://files.eccomasproceedia.org/papers/compdyn-2017/17557.pdf?mtime=20171002111216"
}