Programa de Pós-Graduação em Engenharia Civil - PPGEC/ITEC

URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/2303

O Programa de Pós-Graduação em Engenharia Civil (PPGEC) do Instituto de Tecnologia (ITEC) da Universidade Federal do Pará (UFPA) foi aprovado pela CAPES em 1999 e teve sua primeira turma iniciada em 2001, sendo o primeiro Curso de Mestrado Engenharia Civil na Região Norte do Brasil, realizando atividades integradas de Ensino, Pesquisa e Extensão nas áreas de Engenharia Civil e Engenharia Sanitária e Ambiental.

Navegar

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Aplicação de madeiras amazônicas em elementos de madeira lamelada colada (MLC)
(Universidade Federal do Pará, 2023-03-16) NEVES, Paulo Henrique Lobo; MOUTINHO, Victor Hugo Pereira; http://lattes.cnpq.br/8464600937488553; MACEDO, Alcebíades Negrão; http://lattes.cnpq.br/8313864897400179
Timber is considered on the world stage as the primary building material of the 21st century. However, for this potential to be actualized, technologies for unfolding and using the raw material, such as Glued Laminated Timber (glulam), need to be disseminated and used in a wider range of species. In this regard, we emphasize that, despite the great existing diversity, only some studies are found to verify the potential use of Amazonian timber in glulam. This way, this paper aims to analyze the gluing of ten species native to the Amazon, namely: Jacaranda sp., Simarouba amara Aubl., Astronomium lecointei, Couratari sp., Cedrela fissilis., Cordia Goeldiana Huber, Hymenaea courbaril., Dipteryx odorata. Euxylophora paraensis., Mezilaurus itauba., and the combination with four different types of adhesives, two structural resistant to moisture and two non-structural, using a shear sample of solid timber as a evidence, with a minimum of 20 repetitions per treatment. Complementary tests such as delamination and static bending were carried out. We verified that for some species there was an adhesive with statistically equal and superior resistance in some combinations compared to the control sample, demonstrating that the studied species have the potential for the production of glulam, as well as for other products that use adhesives.
Acesso aberto (Open Access)
Proposta analítica para estimar as resistências residuais à tração por flexão em concreto reforçado com fibra de aço
(Universidade Federal do Pará, 2022-06-15) CASTRO, Lana Daniele dos Santos Gomes; OLIVEIRA, Dênio Ramam Carvalho de; http://lattes.cnpq.br/1324105476558186
This research presents equations that estimate the residual resistances, fRi (i = 1 to 4), based on the main parameters that influence the performance of steel fiber reinforced concrete (SFRC), such as the geometric properties of steel fibers, the concrete compressive strength (fc) and fiber volume fraction (Vf). For this purpose, the research was divided into three stages, the first one consisted of creating an extensive and diversified database to, from it, develop the residual resistances equations through multiple regression. The next stage was experimental, composed of 15 beams (150x150x550) mm notched and tested to flexural tension, with variable fiber volumes, with contents of 0.0%, 0.5%, 1.0%, 1.5% and 2.0%. Finally, for the analysis of the equations elaborated in the first step, another database is presented, in which experimental results collected from the literature and those obtained in this research were inserted, and, additionally,performance comparisons were performed with four other existing analytical models. It was concluded that the analytical proposal presented by this study to define the residual resistances, in comparison with the other existing empirical models, stood out for its good performance, since it was the most accurate, less penalized and dispersed, demonstrating the reliability of the equations.

Navegar

Navegando Programa de Pós-Graduação em Engenharia Civil - PPGEC/ITEC por Afiliação "IFPA - Instituto Federal de Educação, Ciência e Tecnologia do Pará (Campus Santarém)"