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Naslov:Large ring test for evaluation of restrained shrinkage cracking : calibration and experimental trial
Avtorji:ID Xu, Zhongyu (Avtor)
ID Hanžič, Lucija (Avtor)
ID Asche, Harry (Avtor)
ID Karlovšek, Jurij (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://onlinelibrary.wiley.com/doi/epdf/10.1155/2024/6698625
 
.pdf PDF - Predstavitvena datoteka, prenos (3,00 MB)
MD5: 47C1B0B57ADEE90630EFD9D0F233CF25
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:The durability of shotcrete tunnel linings is significantly affected by restrained shrinkage cracking. Given the unique characteristics of shotcrete applied in tunnel linings, especially when dealing with accelerated shotcrete containing reinforcement fibres, it is necessary to upscale the ring test commonly used. This paper presents a comprehensive experiment using large ring tests with cast concrete to investigate the impact of upscaling ring test geometry. The two ring specimens demonstrated comparable cracking age (22 days) and strain measured in the steel ring, suggesting that consistent results can be obtained through the proposed instrumentation, calibration, and correction methods. Moreover, the estimated induced tensile stresses of the concrete rings (2.8 and 2.7 MPa) are slightly lower than the predicted tensile strength (3.3 MPa) at the age of cracking, which indicates that some driving forces contributing to restrained shrinkage cracking were not indicated in the strain gauge readings. Furthermore, the study identified multi-crack formation and additional potential causes for crack initiation, which include self-restraint due to the moisture gradient in the vertical direction, deflection of the concrete ring caused by its self-weight, and friction on the contact surface of the support. Therefore, optimising the geometry of the ring specimens and the apparatus is imperative to minimise additional driving forces and unmeasurable restraints for crack initiation, especially when employing the stress rate method to assess cracking potential.
Ključne besede:concrete, restrained shrinkage, tunnel lining, large ring test
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:05.04.2024
Založnik:Hindawi Publishing Corporation
Leto izida:2024
Št. strani:str. 1-18
Številčenje:Vol. 2024, Issue 1
PID:20.500.12556/DiRROS-19612 Novo okno
UDK:620.1/.2
ISSN pri članku:1687-8094
DOI:10.1155/2024/6698625 Novo okno
COBISS.SI-ID:201974787 Novo okno
Avtorske pravice:© 2024 Zhongyu Xu et al.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 16. 7. 2024;
Datum objave v DiRROS:22.07.2024
Število ogledov:478
Število prenosov:326
Metapodatki:XML DC-XML DC-RDF
:
XU, Zhongyu, HANŽIČ, Lucija, ASCHE, Harry in KARLOVŠEK, Jurij, 2024, Large ring test for evaluation of restrained shrinkage cracking : calibration and experimental trial. Advances in Civil Engineering (Online) [na spletu]. 2024. Vol. 2024, no. 1, p. 1–18. [Dostopano 17 april 2025]. DOI 10.1155/2024/6698625. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=19612
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Gradivo je del revije

Naslov:Advances in Civil Engineering (Online)
Skrajšan naslov:Adv. Civ. Eng. (Online)
Založnik:Hindawi Publishing Corporation
ISSN:1687-8094
COBISS.SI-ID:522082585 Novo okno

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:beton, ovirano krčenje, tunelske obloge, test z velikim obročem


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