Encontrados 13 documentos, a visualizar página 1 de 2
Numerical modelling of the punching behaviour of steel fibre reinforced self-co...
Barros, Joaquim A. O.; Teixeira, Marcos D. E.; Cunha, Vítor M. C. F.; Moraes-Neto, B. N.; Gouveia, A. VenturaPunching shear failure on flat reinforced concrete slabs of residential and commercial buildings is generally avoided by using transversal reinforcement and/or chapiters. The first option requires intense labour, mainly when densely flexural reinforcement exists in the potential punching failure region, with detrimental consequences in terms of costs of this construction solution. The second option has also ext...
A model to simulate the contribution of fibre reinforcement for the punching re...
Moraes-Neto, B. N.; Barros, Joaquim A. O.; Melo, Guilherme S.In this paper analytical formulations are developed for the prediction of the punching resistance of flat slabs 17 of steel fibre reinforced concrete (SFRC) flexurally reinforced with steel bars. By performing statistical 18 analysis with a database that collects experimental results on the characterization of the post-cracking 19 behaviour of SFRC, equations are determined for the evaluation of the residual fl...
A model for the prediction of the punching resistance of steel fibre reinforced...
Moraes-Neto, B. N.; Barros, Joaquim A. O.; Melo, Guilherme S.With the aim of contributing for the development of design guidelines capable of predicting with high accuracy the punching resistance of steel fibre reinforced concrete (SFRC) flat slabs, a proposal is presented in the present paper and its predictive performance is assessed by using a database that collects the experimental results from 154 punching tests. The theoretical fundaments of this proposal are based...
Life Cycle Assessment of fish and seafood products an overview
Cavadas, A.; Teixeira, A.; Neto, B.; Rodrigues, Sara[Abstract] ; [Resumo]
A review of the availability and consumption of fish and seafood in Portugal
Teixeira, A.; Cavadas, A.; Rodrigues, Sara; Neto, B.[Abstract] ; [Resumo]
The predictive performance of design models for the punching resistance of SFRC...
Moraes-Neto, B. N.; Barros, Joaquim A. O.; Melo, Guilherme S.In the recent years steel fibre reinforced concrete (SFRC), in a volume percentage between 0.75 and 1.25, is being proposed to build slabs supported on piles and slabs supported on columns, where the unique conventional reinforcement is composed of some steel bars in the alignments of the columns/piles, designated as anti-progressive collapse bars. Punching resistance, however, can be a concern in this str...
Avaliação do cálculo da resistência ao punçoamento centrado de lajes fungiforme...
Moraes-Neto, B. N.; Barros, Joaquim A. O.; Melo, Guilherme S.; Eira, Hélder C. A.Desde 1979 que as fibras de aço vêm sendo estudadas como uma alternativa de reforço às estruturas de betão armado. No que diz respeito ao sistema estrutural de lajes fungiformes, os avanços conseguidos no campo da ciência dos materiais e das técnicas de construção já permitem a construção de estruturas onde as lajes são reforçadas praticamente apenas por fibras de aço. Para que este novo sistema construtivo...
C+L band gain equalization for extended reach WDM-ring PON using hybrid Raman/i...
Neto, B.; Rocha, A. M.; Girão, J. P.; Dionisio, R. P.; Reis, C.; Chatzi, S.; Bonada, F.; Lazaro, J.; Teixeira, A.; André, P. S.“Copyright © [2010] IEEE. Reprinted from ICTON 2010. ISBN 978-1-4244-7798-2. This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissi...
Enhanced optical gain clamping for upstream packet based traffic on hybrid WDM/T...
Neto, B.; Klingler, A.; Reis, C.; Dionísio, R. P.; Nogueira, R. N.; Teixeira, A. L. J.; André, P. S.In this paper, we propose a method to mitigate the temporal power transients arising from Erbium doped fiber amplifiers (EDFAs) on packeted/bursty scenario. The technique, applicable on hybrid WDM/TDM-PON for extended reach, is based on a low power clamping provided by a distributed feedback (DFB) laser and a fiber Bragg grating (FBG). An mprovement in the data signal Q factor was achieved keeping the clamping ...
Avaliação toxicológica e efeito do extrato acetato de etila da fibra de Cocos n...
Silva,L.C.R.; Nunes-Pinheiro,D.C.S.; Morais,S.M.; Lopes-Neto,B.E.; Santos,G.J.L.; Campello,C.C.Objetivou-se investigar o efeito do extrato acetato de etila de Cocos nucifera (EAECN) sobre parâmetros fisiológicos e sobre a inflamação tópica induzida por xileno. EAECN foi obtido a partir da água da fibra da casca do coco verde e o teste fitoquímico indicou a presença de taninos condensados, flavononas, flavonóis, flavononóis, xantonas e esteróides. EAECN foi administrado aos camundongos Swiss por via oral ...
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