Flat Slab
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Análise experimental de lajes lisas unidirecionais de concreto armado com pilares retangulares ao puncionamento / Experimental unidirectional smooth flagstone analysis of armed concrete with rectangular pillars to the puncionamento
Foram analisadas experimentalmente 8 (oito) lajes lisas de concreto armado sem armadura de cisalhamento, variando-se a taxa de armadura de flexão secundária e a maior dimensão dos pilares (cmax). As lajes de dimensões (1.800 x 1.800 x 110) mm, mesma armadura flexão principal, menor dimensão dos pilares (cmin) constante e igual a 85 mm, resistência à
Publicado em: 2007
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14. Punção em lajes cogumelo : estudo da retangularidade dos pilares
Eight reinforced concrete square flat slabs of reinforced concrete were tested. Slabs were 130mm thick with an 1800 mm side and were submitted to central loading, and the objective was to investigate the influence of column rectangularity coefficient. Column cross section dimensions (cmáx/cmín) varyied between 1 and 4, with a constant perimeter equal to 10
Publicado em: 2006
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15. Punção em lajes cogumelo : estudo da retangularidade dos pilares
São analisadas experimentalmente 8 (oito) lajes cogumelo de concreto armado quadradas com 1800 mm de lado e 130 mm de espessura, submetidas a carregamento central, com o objetivo de investigar a influência do índice de retanguralidade do pilar, sendo que a relação entre as dimensões da seção transversal do pilar (cmáx/cmín) variou entre 1 e 4, com
Publicado em: 2006
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16. THEORETICAL AND EXPERIMENTAL ANALYSIS OF RIBBING FLAT SLABS IN REDUCED SCALE) / ANÁLISE TEÓRICA E EXPERIMENTAL DE LAJES COGUMELO NERVURADAS EM ESCALA REDUZIDA
The experimental analysis of structures of reinforced concrete supplies subsidies to the knowledge of the behavior of structural parts built with this material. Experimental analysis in reduced scale brings great advantages in relation to experimentation of real size models, since the amount of used materials is lesser and the physical conditions for laborat
Publicado em: 2005
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17. Cálculo de lajes lisas com protensão parcial e limitada.
Flat slabs are associated with rationalization, better esthetic conditions and higher speed during construction. The use of post-tension can make this system viable since it strongly improves the structural performance in respect to punching and in case of extreme deflection of the slab. The durability of prestressed concrete elements is assured by meeting t
Publicado em: 2005
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18. Avaliação de tecnicas para inserção da resina composta e da utilização de um composito de baixa viscosidade na resistencia de união a parede gengival de cavidades classe II
The aim of this study was to evaluate the effects of different filling techniques, cavity configuration and use of a low-viscosity composite liner on bond strength to the dentin of Class II cavities gingival floor; analyze the failure modes of fractured specimens; and observe the site available for bonding with a Scanning Electron Microscope (SEM). Standardi
Publicado em: 2003
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19. Análise dos mecanismos resistentes e das similaridades de efeitos da adição de fibras de aço na resistência e na ductilidade à punção de lajes-cogumelo e ao cisalhamento de vigas de concreto. / Analysis of resistant mechanisms and similarities of the addition effect of steel fibers on strength and ductility to both the punching shear of flat slabs and the shear of concrete beams.
One of the main problems of flat slabs concerns the punching shear failure of the slab-column connection. This form of failure must be avoided, providing flat slabs with the best conditions for the development of yielding mechanisms of the flexural reinforcement before the occurrence of shear failure. The addition of steel fibers to concrete elements subject
Publicado em: 2002
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20. Experimental punching shear analysis of reinforced and prestressed concrete slabs / Análise experimental da punção em lajes de concreto armado e protendido
The use of flat plates may offer some economical and aesthetic benefits when compared with other structural systems. The use of post-tensioned slabs may offer other advantages, as a better crack and deflection control and a thinner slab for the same span and load conditions. This work presents some experimental results and conclusions about the punching shea
Publicado em: 2001
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21. Aplicação do método dos elementos de contorno à análise de pavimentos de edifícios / Application of the boundary element method to slab floor analysis
This work deals with a formulation of the boundary element method applied to slab floor analysis with special emphasis concrete flat slabs exhibiting physical non-linearities. In this formulation normal and shear components of the stress tensor are taken into account to capture more accurately the ultimate strength of the structural element. The boundary ele
Publicado em: 2001