PSI - Issue 28

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 il l li t . i i t. tr t r l I t rit r i ( )

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ScienceDirect

Procedia Structural Integrity 28 (2020) 957–963

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Abstract The paper deals with an experimental study of shear resistance of reinforced concrete beams without shear reinforcement. A concrete specimen is reinforced besides the steel reinforcing bars also with straight, short fibers with dosing 40, 75 and 110 kg/m 3 . The research is focused on determining the effect of fibers dosing on the load capacity of the reinforced concrete beams. The research is complemented with numerical modeling of experiments, where one of the possible approaches to the advanced design of structures respecting the actual behavior and failure of fiber reinforced concrete is illustrated, using non-linear analysis and finite element method. A fracture-plastic material model and 3D computational model are chosen for modeling reinforced concrete beams with fibers. Besides common material testing, fracture mechanical tests are performed within the experimental program, specifically a three-point bending test with a notch. In the paper the results of types of tests and the determined fracture energy are compared. © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo Keywords: Fiber reinforced concrete, shear, tensile strength, numerical modelling ; 1. Introduction The use of fiber reinforced concrete is becoming increasingly popular in civil engineering. A number of projects and professional or research associations are dedicated to research in this area, where the most important recommendations include (DAfStb, 2011), (RILEM, 2011), Model Code 2010 and (di Prisco et al., 2013). The wide l it i t l t i t i t it t i t. t i i i i t t l i i l it t i t, t i it i , / 3 . i t i i t t i i t l it t i t . i l t it i l li i t , t i l t t i t t ti t t l i il i i t i ill t t , i li l i i it l t t . t l ti t i l l t ti l l li i t it i . i t i l t ti , t i l t t it i t i t l , i i ll t i t i t t it t . t t lt t t t t t i t . t . li . . This is an open access article under the CC BY-NC-ND license (https://creativec . /li / / . i i ilit t t t l t it i t : i r r i f r r t , r, t il tr t , ri l lli ; . i i i t i i i i l l i i il i i . j t i l i ti i t t i t i , t t i t t ti i l t , , , , l i i t l., . i 1st Virtual European Conference on Fracture Study on Shear Behavior of Steel Fiber Reinforced Concrete Small Beams Zuzana Marcalikova a, *, Pavlina Mateckova a , Miroslav Racek a , David Bujdos a a Faculty of Civil Engineering, VSB-Technical University of Ostrava, Ludvíka Podéšt ě 1875/17, 708 00 Ostrava-Poruba, Czech Republic Zuzana M a, a lt f i il i i , - i l i it f t , í t / , t - , li

* Corresponding author. Tel.: +420-597-321-318; fax: +420-597-321-356. E-mail address: zuzana.marcalikova@vsb.cz i t r. l.: - - - ; f : - - - . - il : . r li . rr

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2452-3216 © 2020 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo i i rti l r t - - li ( tt :// r ti . r /li / - - / . ) r-r i r r i ilit f t r tr t r l I t rit i t ( I )

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.11.069