Počet záznamů: 1
Effect of reinforcement parameters on the impact resistance of cementitious composites for vehicle restraint systems
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SYSNO ASEP 0572688 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Effect of reinforcement parameters on the impact resistance of cementitious composites for vehicle restraint systems Tvůrce(i) Drdlová, M. (CZ)
Böhm, P. (CZ)
Bibora, P. (CZ)
Šperl, Martin (UTAM-F) RID, SAICelkový počet autorů 4 Zdroj.dok. Procedia Structural Integrity, 42. - Amsterdam : Elsevier, 2022 / Moreira P. ; Reis L. F. G. - ISSN 2452-3216 Rozsah stran s. 1382-1390 Poč.str. 9 s. Forma vydání Tištěná - P Akce European Conference on Fracture /23./ Datum konání 27.06.2022 - 01.07.2022 Místo konání Funchal Země PT - Portugalsko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova concrete ; impact toughness ; polyurea ; UHPFRC ; vehicle restraint systems Obor OECD Construction engineering, Municipal and structural engineering Způsob publikování Open access Institucionální podpora UTAM-F - RVO:68378297 EID SCOPUS 85158924660 DOI 10.1016/j.prostr.2022.12.176 Anotace The presented study investigates the dynamic resistance of cement-based large-format elements with various types of reinforcement and retrofitting. Both inner and outer reinforcement has been assessed. The effect of matrix type (low, high, and ultra-high-strength), amount of steel fibres, and ribbed reinforcing steel on impact toughness has been evaluated. The influence of an additional polymer-based layer to increase impact resistance level has also been investigated. The effectiveness of each reinforcing method has been compared. An large-scale impact hammer device KYV-I-2020 (up to 1100 J) has been used to determine the impact toughness. The results show that ribbed reinforcing steel increases the impact toughness more effectively than the fibre reinforcement, steel mesh and additional polymer layer. However, fibers significantly reduce fragmentation, especially at a higher concentration of 2.5 vol%, contributing to the overall higher impact resistance of the elements and their safety in practical use. The test results also show a significant effect of the matrix type, with the most increased impact toughness achieved when using a high strength matrix. The addition of an antifragmentation polymer layer then provides a further increase in impact toughness. The results also indicate that similar resistance capacity can be achieved using different reinforcement combinations, which is crucial for designing the material composition with the optimal performance/cost ratio. The presented research is a part of the development process of the restraint systems for stopping trucks. The data obtained has been used to create the elements with suitable composition - their effectiveness has been successfully verified by numerical simulations and real tests. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2024 Elektronická adresa https://doi.org/10.1016/j.prostr.2022.12.176
Počet záznamů: 1