Transverse Reinforcement
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. INFLUENCE OF TRANSVERSE REINFORCEMENT AND OF CONCRETE COVER OF LONGITUDINAL REINFORCEMENT ON THE ULTIMATE STRENGTH OF CONCRETE COLUMNS / INFLUÊNCIA DA ARMADURA TRANSVERSAL E DO COBRIMENTO DA ARMADURA LONGITUDINAL NA RESISTÊNCIA DE PILARES DE CONCRETO
Neste trabalho é feito o estudo da influência do cobrimento da armadura longitudinal e dos grampos suplementares na resistência de pilares de concreto submetidos à compressão excêntrica. Para este fim foram ensaiados pilares curtos, com armadura longitudinal contínua e pilares com emenda na armadura. Foi elaborado um modelo para o cálculo da distribu
Publicado em: 2005
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14. "Compósitos de fibras de sisal para uso em reforço de estruturas de madeira" / Sisal composites to reinforcement of timber structures.
Many buildings of cultural and historical interest require reinforcement of their timber structures. This research focuses on fiber-reinforced composites to repair and reinforce such structural elements of wood as an alternative for carbon and glass fibers, which are the materials most commonly used for purposes of reinforcement. Natural fibers are an import
Publicado em: 2005
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15. ESTUDO DA FLAMBAGEM DE ARMADURAS LONGITUDINAIS EM PILARES DE CONCRETO ARMADO / BUCKLING ANALYSIS OF LONGITUDINAL REINFORCEMENT IN CONCRETE COLUMNS
A flambagem das armaduras longitudinais em pilares de concreto armado pode ocorrer na região entre dois estribos consecutivos, ou pode envolver um certo número de estribos. As normas de projeto existentes não fornecem uma metodologia apropriada para o dimensionamento dos estribos em diferentes situações. O presente trabalho tem por objetivo desenvolver
Publicado em: 2004
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16. Estudo teórico-experimental do comportamento de nós de pórtico de concreto armado submetidos a ações cíclicas / Theoretical and experimental study of reinforced concrete frame joints behavior under cyclic load
The present thesis studies the behavior of frame joints in reinforced concrete beam-column joints subjected to cyclic loads. The thesis is divided into two parts: an experimental study and a theoretical-based study. The experimental study is based on laboratory tests on five physical models of beam-column joints. The results of this experimental study permit
Publicado em: 2004
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17. Mecanismos de confinamento e suas implicações no reforço de pilares de concreto por encamisamento com compósito de fibras de carbono / Confinement effects and their implication on the strengthening of concrete columns by wrapping with carbon fiber composites.
This work deals with the effect of confinement in reinforced concrete columns strengthened with carbon fiber composites. By wrapping, it is possible to mobilize the passive confinement of the concrete, restricting its lateral expansion. With the confinement, the concrete shows substantial gains in resistance and ductility. An experimental analysis of circula
Publicado em: 2002
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18. Comportamento estrutural de pilares curtos em concreto de alta resistência
High-strength concrete (HSC) has found an increase utilization in the last twenty years, in particular in the case of columns of high-rise buildings. In spite of the great advantages presented by this material, both resistance and ductility of HSC columns have been a matter of concern with respect to the safety of these structural elements. However, it is a
Publicado em: 2001
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19. PHOTOELASTIC GENERAL METHOD TO DETERMINE STRESS INTENSITY FACTORS KI AND KII / UMA GENERALIZAÇÃO DOS MÉTODOS DE DETERMINAÇÃO DOS FATORES DE INTENSIDADE DE TENSÃO KI E KII ATRAVÉS DA FOTOELASTICIDADE
A computational method has been developed to determine mixed-mode stress intensity factors from isochromatic fringe patterns. The method proposes a general formulation of the stress field around a crack tip. It searches to obtain not only the stress intensity factors but also all the other non-singular stress field parameters, associated to different geometr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/04/1986
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20. Cell Growth Pattern and Wall Microfibrillar Arrangement: Experiments with Nitella
In cylindrical cells growing throughout their length, over-all transverse reinforcement of the wall by microfibrils is believed to be required for cell elongation. The multinet theory states that in such cells microfibrils are deposited at the inner surface of the wall with transverse orientation and are then passively reoriented toward the longitudinal dire