Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Semi-circular Bending Test to Evaluate the Post Cracking Behaviour of Fibre Reinforced Concretes
https://orcid.org/http://orcid.org/0000-0002-7918-6754
https://orcid.org/http://orcid.org/0000-0003-3804-9427
The known tests to evaluate the post-cracking behaviour of fibre reinforced concretes (FRC) have some disadvantages. The most representative test of tensile behaviour, the direct tensile test (DT), is difficult to perform. Therefore, the use of indirect tests to evaluate the post cracking behaviour of FRC is common. Some of these tests are carried out in such a way that the samples are molded separately to the structure in prismatic shapes. This geometry makes it difficult to extract samples from the real structure to evaluate the behaviour of the FRC in the structure. Especially for the fibre reinforced self-compacting concretes, the fibre distribution and directions are strongly influenced by the shape of the structure and casting procedures, being important to use structural specimens, representative of the actual structure that the FRC is intended to be applied. This work proposes the use of a semi-circular bending (SCB) test for the characterization of post cracking behaviour of FRC. An experimental program was performed to demonstrate the use of the SCB test to characterize steel fibre reinforced self-compacting concretes (SFRSCC). Samples with small dimensions were extracted by means of a concrete core cutting machine. The results of the SCB tests were presented, and an inverse analysis was performed to obtain the tension behaviour of the SFRSCC. The results, obtained in terms of stress versus crack opening relationship, were compared with results obtained by DT tests. The results showed the potential of SCB test to evaluate the post-cracking behaviour of FRC, and the evaluated test seems to be particularly suitable for structural test specimens, extracted directly from the structure.
Semi-circular Bending Test to Evaluate the Post Cracking Behaviour of Fibre Reinforced Concretes
https://orcid.org/http://orcid.org/0000-0002-7918-6754
https://orcid.org/http://orcid.org/0000-0003-3804-9427
The known tests to evaluate the post-cracking behaviour of fibre reinforced concretes (FRC) have some disadvantages. The most representative test of tensile behaviour, the direct tensile test (DT), is difficult to perform. Therefore, the use of indirect tests to evaluate the post cracking behaviour of FRC is common. Some of these tests are carried out in such a way that the samples are molded separately to the structure in prismatic shapes. This geometry makes it difficult to extract samples from the real structure to evaluate the behaviour of the FRC in the structure. Especially for the fibre reinforced self-compacting concretes, the fibre distribution and directions are strongly influenced by the shape of the structure and casting procedures, being important to use structural specimens, representative of the actual structure that the FRC is intended to be applied. This work proposes the use of a semi-circular bending (SCB) test for the characterization of post cracking behaviour of FRC. An experimental program was performed to demonstrate the use of the SCB test to characterize steel fibre reinforced self-compacting concretes (SFRSCC). Samples with small dimensions were extracted by means of a concrete core cutting machine. The results of the SCB tests were presented, and an inverse analysis was performed to obtain the tension behaviour of the SFRSCC. The results, obtained in terms of stress versus crack opening relationship, were compared with results obtained by DT tests. The results showed the potential of SCB test to evaluate the post-cracking behaviour of FRC, and the evaluated test seems to be particularly suitable for structural test specimens, extracted directly from the structure.
Semi-circular Bending Test to Evaluate the Post Cracking Behaviour of Fibre Reinforced Concretes
https://orcid.org/http://orcid.org/0000-0002-7918-6754
https://orcid.org/http://orcid.org/0000-0003-3804-9427
The known tests to evaluate the post-cracking behaviour of fibre reinforced concretes (FRC) have some disadvantages. The most representative test of tensile behaviour, the direct tensile test (DT), is difficult to perform. Therefore, the use of indirect tests to evaluate the post cracking behaviour of FRC is common. Some of these tests are carried out in such a way that the samples are molded separately to the structure in prismatic shapes. This geometry makes it difficult to extract samples from the real structure to evaluate the behaviour of the FRC in the structure. Especially for the fibre reinforced self-compacting concretes, the fibre distribution and directions are strongly influenced by the shape of the structure and casting procedures, being important to use structural specimens, representative of the actual structure that the FRC is intended to be applied. This work proposes the use of a semi-circular bending (SCB) test for the characterization of post cracking behaviour of FRC. An experimental program was performed to demonstrate the use of the SCB test to characterize steel fibre reinforced self-compacting concretes (SFRSCC). Samples with small dimensions were extracted by means of a concrete core cutting machine. The results of the SCB tests were presented, and an inverse analysis was performed to obtain the tension behaviour of the SFRSCC. The results, obtained in terms of stress versus crack opening relationship, were compared with results obtained by DT tests. The results showed the potential of SCB test to evaluate the post-cracking behaviour of FRC, and the evaluated test seems to be particularly suitable for structural test specimens, extracted directly from the structure.
Semi-circular Bending Test to Evaluate the Post Cracking Behaviour of Fibre Reinforced Concretes
RILEM Bookseries
Jędrzejewska, Agnieszka (Herausgeber:in) / Kanavaris, Fragkoulis (Herausgeber:in) / Azenha, Miguel (Herausgeber:in) / Benboudjema, Farid (Herausgeber:in) / Schlicke, Dirk (Herausgeber:in) / de Carvalho, Pedro Paulo Martins (Autor:in) / de Melo Lameiras, Rodrigo (Autor:in)
International RILEM Conference on Synergising expertise towards sustainability and robustness of CBMs and concrete structures ; 2023 ; Milos Island, Greece
11.06.2023
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Post-cracking behaviour of steel and macro-synthetic fibre-reinforced concretes
| Online Contents | 2011
Post-cracking behaviour of steel and macro-synthetic fibre-reinforced concretes
| British Library Online Contents | 2011
Mechanical behaviour of metal-fibre reinforced concretes
| Elsevier | 1991