# Department of Mechanics: Seminar: Abstract Grassl 2019

### Virtual laboratory for reinforced concrete

#### Peter Grassl, James Watt School of Engineering, University of Glasgow

**Room B-366, Faculty of Civil Engineering, CTU in Prague**

**Thursday, 19 September 2019, 11am**

Improving the design of reinforced concrete requires a good understanding of its failure process, which is complex because of the interplay of cracking and crushing of concrete, as well as yielding and rupture of steel. A virtual laboratory, in which computer models are used to simulate the failure process, plays an important role in elucidating the effects of material composition on structural response. In the first part of this lecture, I will present recent results on 3D modelling of the failure process of reinforcement detailing in structural concrete connections. In particular, the effect of steel fibres on the performance of connections will be discussed. In the second part of the lecture, I will focus on the development of computational cells for structural concrete components. I will present new techniques for applying periodic boundary conditions to cells, which are then used for the modelling of RVEs of Bernoulli beams and Kirchhoff-Love plates.

Selected references:

- Grassl P. and A. Antonelli. "3D network modelling of fracture processes in fibre-reinforced geomaterials", Int J Solids Struct, vol. 156-157, Pages 234-242, 2019.
- Grassl P., M. Johansson and J. Leppänen. "On the numerical modelling of bond for the failure analysis of reinforced concrete.", Eng Fract Mech, vol. 189, Pages 13-26, 2018.
- D. Xenos, P. Grassl. "Modelling the failure of reinforced concrete with nonlocal and crack band approaches using the damage-plasticity model CDPM2", Finite Elem Anal Des, vols. 117-118, Pages 11-20, 2016.
- D. Xenos, D. Grégoire, S. Morel and P. Grassl. "Calibration of nonlocal models for tensile fracture in quasi-brittle heterogeneous materials." J Mech Phys Solids, vol. 82, Pages 48-60, 2015.
- P. Grassl, D. Xenos, U. Nyström, R. Rempling, K. Gylltoft. "CDPM2: A damage-plasticity approach to modelling the failure of concrete". Int J Solids Struct. Vol. 50, Issue 24, pp. 3805-3816, 2013
- P. Grassl and M. Jirásek. "Meso-scale approach to modelling the fracture process zone of concrete subjected to uniaxial tension". Int J Solids Struct. Volume 47, Issues 7-8, pp. 957-968, 2010.
- P. Grassl and M. Jirásek. "Damage-plastic model for concrete failure". Int J Solids Struct. Vol. 43, pp. 7166-7196, 2006.