Empregaram-se dois procedimentos: numa 1ª série, o deslocamento diametral foi medido por meio de LVDTs posicionados em ambas as extremidades dos tubos, enquanto que, na 2ª série se mediu o deslocamento apenas na ponta dos tubos. Alguns dos tubos foram reforçados com armaduras convencionais e outros apenas com fibras metálicas com a finalidade de comparar as diferentes respostas mecânicas no ensaio de três cutelos. O diâmetro destes tubos foi de 600 mm e seu comprimento de 2500 mm. Neste sentido, se realizou um trabalho experimental utilizando corpos-de-prova em escala real. Este estudo foi levado a cabo com a finalidade de tentar reduzir algumas das incertezas relacionadas com o desempenho dos TCRF e proporcionar melhores condições para viabilizar o uso das fibras como elemento de reforço em tubos. Parte 2: Modelo numérico para simular o ensaio de compressão diametral"), se apresentam os aspectos associados à simulação numérica da resposta mecânica destes tubos. Na segunda parte do trabalho ("Tubos de concreto reforçado com fibra de aço.
São apresentados e discutidos os resultados obtidos em um estudo experimental focado no procedimento de ensaio e na resposta mecânica obtida para cada um dos teores de fibras utilizados nos tubos. The fiber content of 40 kg/m3 provided a hardening behavior for the FRCP, and could be considered as equivalent to the critical volume in this condition.Ĭoncrete pipes steel fibers crushing test mechanical behavior standardsĪ primeira parte deste trabalho se concentra no desenvolvimento tecnológico de tubos de concreto reforçado com fibras (TCRF). At this condition, the steel fibers showed an equivalent performance to superior class pipes made with traditional reinforced. The fiber reinforcement was very effective, especially when low level of displacement was imposed to the FRCP. The results shown a more rigidity response of the pipe during tests when the displacements were measured at the enlarged section of the socket. In the 2nd Series, just one LVDT is positioned at the spigot. In the 1st Series, the diameter displacement was monitored by the use of two LVDTs positioned at both extremities of the pipes. Two test procedures were used in that sense. The pipes were reinforced with traditional bars and different contents of steel fibers in order to compare their performance through the crushing test. The diameter of the specimens was 600 mm, and they had a length of 2500 mm.
Postal 4 crackpipes full#
In this respect, an experimental study was carried out using sewage concrete pipes in full scale as specimens. This study was carried out trying to reduce some uncertainties related to FRCP performance and provide a better condition to the use of these components. Part 2: Numerical model to simulate the crushing test"), the aspects of FRCP numerical modeling are presented and analyzed using the same experimental results in order to be validated. In the second part ("Steel fiber reinforced concrete pipes. Here is presented and discussed the experimental campaign focusing the test procedure and the mechanical behavior obtained for each of the dosages of fiber used. This paper is the first part of an extensive work focusing the technological development of steel fiber reinforced concrete pipes (FRCP).
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