PSI - Issue 47

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ScienceDirect

Procedia Structural Integrity 47 (2023) 331–336 Structural Integrity Procedia 00 (2023) 000–000 Structural Integrity Procedia 00 (2023) 000–000

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© 2023 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 IGF27 chairpersons © 2023 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 IGF27 chairpersons. Keywords: UHP(FR)C; dynamic compressive test; DAMP; numerical simulation; high stress rate. Abstract This paper describes the comparison between compressive behaviour of a commercial Ultra High-Performance (Fibre-Reinforced) Concrete, having 3% content of high carbon straight steel fibres, and its matrix. A special device named 3D-Modified Hopkinson Bar (3D-MHB) installed in the DynaMat SUPSI Laboratory was used to test cylindrical specimens with 30 mm diameter and height / diameter ratios of 1, 1.5 and 2. Experimental results were compared to those obtained numerically using the DAMP explicit material model, which can accurately represent multiple dynamic scenarios in structural analysis. © 2023 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 IGF27 chairpersons. Keywords: UHP(FR)C; dynamic compressive test; DAMP; numerical simulation; high stress rate. Abstract This paper describes the comparison between compressive behaviour of a commercial Ultra High-Performance (Fibre-Reinforced) Concrete, having 3% content of high carbon straight steel fibres, and its matrix. A special device named 3D-Modified Hopkinson Bar (3D-MHB) installed in the DynaMat SUPSI Laboratory was used to test cylindrical specimens with 30 mm diameter and height / diameter ratios of 1, 1.5 and 2. Experimental results were compared to those obtained numerically using the DAMP explicit material model, which can accurately represent multiple dynamic scenarios in structural analysis. Ultra High-Performance Fibre-Reinforced Concrete (UHP(FR)C) is an advanced cementitious material that com bines high strength and enhanced toughness with elevated durability. The high strain rate behaviour of this material is largely determined by its microstructure, which typically consists of a combination of ultra-fine cement particles, high-strength fibres, and a dense matrix of interlocking particles. This microstructure results in a material that is highly resistant even under high strain rates. These outstanding characteristics make this material a very attractive choice and it is frequently used for a variety of structural applications, including the construction and refurbishment of bridges, high-rise buildings, and other infrastructure. These structures might be subjected to high-dynamic loads such as impact and blast. Engineering applications of UHP(FR)C include protective structures and critical infras tructures. In this frame, a multi-year research project titled Protection of Infrastructure Elements from the e ff ects of IEDs and Blast Charges (supported by “armasuisse – Science and Technology”of the Swiss Federal Department of Defence, Civil Protection and Sport) extensive numerical and experimental researches were conducted (e.g. Cadoni and Forni (2016); Riganti and Cadoni (2020)). Among them, the response of UHP(FR)C under dynamic compres sion was included. Structures are usually subjected to service loads as well as confinement. It is necessary to subject the test specimen to static stresses (mono-bi-triaxial) prior to impact loading in order to form a comparison to the Ultra High-Performance Fibre-Reinforced Concrete (UHP(FR)C) is an advanced cementitious material that com bines high strength and enhanced toughness with elevated durability. The high strain rate behaviour of this material is largely determined by its microstructure, which typically consists of a combination of ultra-fine cement particles, high-strength fibres, and a dense matrix of interlocking particles. This microstructure results in a material that is highly resistant even under high strain rates. These outstanding characteristics make this material a very attractive choice and it is frequently used for a variety of structural applications, including the construction and refurbishment of bridges, high-rise buildings, and other infrastructure. These structures might be subjected to high-dynamic loads such as impact and blast. Engineering applications of UHP(FR)C include protective structures and critical infras tructures. In this frame, a multi-year research project titled Protection of Infrastructure Elements from the e ff ects of IEDs and Blast Charges (supported by “armasuisse – Science and Technology”of the Swiss Federal Department of Defence, Civil Protection and Sport) extensive numerical and experimental researches were conducted (e.g. Cadoni and Forni (2016); Riganti and Cadoni (2020)). Among them, the response of UHP(FR)C under dynamic compres sion was included. Structures are usually subjected to service loads as well as confinement. It is necessary to subject the test specimen to static stresses (mono-bi-triaxial) prior to impact loading in order to form a comparison to the 27th International Conference on Fracture and Structural Integrity (IGF27) UHP(FR)C under impact loading 27th International Conference on Fracture and Structural Integrity (IGF27) UHP(FR)C under impact loading Ezio Cadoni a, ∗ , Matteo Dotta a , Daniele Forni a , Gianmario Riganti a , Nicoletta Tesio a a University of Applied Sciences and Arts of Southern Switzerland - DynaMat SUPSI Laboratory, Mendrisio 6850, Switzerland Ezio Cadoni a, ∗ , Matteo Dotta a , Daniele Forni a , Gianmario Riganti a , Nicoletta Tesio a a University of Applied Sciences and Arts of Southern Switzerland - DynaMat SUPSI Laboratory, Mendrisio 6850, Switzerland 1. Introduction 1. Introduction

∗ Corresponding author. Tel.: + 41-58-666-6377. E-mail address: ezio.cadoni@supsi.ch ∗ Corresponding author. Tel.: + 41-58-666-6377. E-mail address: ezio.cadoni@supsi.ch

2452-3216 © 2023 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 IGF27 chairpersons 10.1016/j.prostr.2023.07.092 2210-7843 © 2023 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 IGF27 chairpersons. 2210-7843 © 2023 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 IGF27 chairpersons.