PSI - Issue 25

Available online at www.sciencedirect.com

ScienceDirect

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 25 (2020) 27–32

1st Virtual Conference on Structural Integrity - VCSI1

Approach to numerical modelling of fiber reinforced concrete

Zuzana Marcalikova a, *, David Bujdos a , Radim Cajka a a Faculty of Civil Engineering, VSB-Technical University of Ostrava, Ludvíka Podéšt ě 1875/17, 708 33 Ostrava-Poruba, Czech Republic

Abstract

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers The paper deals with approaches to numerical modelling of fiber reinforced concrete in computer simulations of laboratory tests and the choice of input parameters of the used material model. Two types of fibers with 75 kg/m 3 dosage are selected for comparison. The fibers used differ mainly in the geometry. The paper evaluates also of laboratory test the basic mechanical properties, which are subsequently used as input parameters in numerical models. The tests include compressive strength, splitting tensile strength and bending tensile strength from the three-point test. The three-point bending test is then used for 3D computer model and fracture-plastic material model. Specifically, it was used to evaluate of numerical simulations of load-displacement diagrams from the three-point test. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers

Keywords: Fiber reinforced concrete; Numerical modeling; material model; three-point bending test

1. Introduction

For the design and analysis of fiber reinforced concrete (DAfStb guidelines, 2011, di Prisco et al. 2013) elements it is necessary to use suitable numerical methods, which can include advanced computer simulations (Cervenka et al., 2007) of real behavior. However, the limitations of numerical modeling include the necessary knowledge of detailed mechanical properties (Holschemacher et al., 2010, Koniki et al., 2018) even after cracks. There are a number of fibers for reinforcing concrete structures. It is also important to describe and formulate the fiber reinforced concrete (Kormanikova and Kotrasova, 2011, Zaborski, 2016). They differ mainly in material, thickness or geometry (Brandt,

* Corresponding author. Tel.: +420 597 321 396; fax: +420 597 321 356. E-mail address: zuzana.marcalikova@vsb.cz

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers 10.1016/j.prostr.2020.04.006