Concrete Slabs
Mostrando 13-24 de 82 artigos, teses e dissertações.
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13. New Transition Wedge Design Composed by Prefabricated Reinforced Concrete Slabs
Abstract Important track degradation occurs in structure-embankment transitions, in which an abrupt change in track vertical stiffness arises, leading to a reduction in passengers comfort and safety. Although granular wedges are suggested by different railroad administrations as a solution to avoid these problems, they present some disadvantages which may af
Lat. Am. j. solids struct.. Publicado em: 2016-08
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14. Fracture Failure of Reinforced Concrete Slabs Subjected to Blast Loading Using the Combined Finite-Discrete Element Method
Abstract Numerical modeling of fracture failure is challenging due to various issues in the constitutive law and the transition of continuum to discrete bodies. Therefore, this study presents the application of the combined finite-discrete element method to investigate the fracture failure of reinforced concrete slabs subjected to blast loading. In numerical
Lat. Am. j. solids struct.. Publicado em: 2016-06
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15. Effect of CFRP and TRM Strengthening of RC Slabs on Punching Shear Strength
Abstract The paper presents experiments involving punching of RC slabs strengthened using externally bonded carbon fiber reinforced polymer (CFRP) sheet and textile reinforced mortar (TRM). Twelve RC slab specimens of two concrete grades (39.9 and 63.2 MPa) and employing two strengthening schemes (CFRP and TRM) were tested. Specimens were supported on two op
Lat. Am. j. solids struct.. Publicado em: 2015-09
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16. Computational Modelling of RC Slabs Cracking with an Embedded Discontinuity Formulation
Abstract This paper investigates the cracking process of reinforced concrete slabs subjected to vertical load, involving their crack pattern and the load-displacement capacity curve. Concrete was discretized with hexahedral finite elements with embedded discontinuities; whereas steel reinforcement was represented by 3D bar elements, placed along the edges of
Lat. Am. j. solids struct.. Publicado em: 2015
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17. Evaluation of dynamic behavior of waffle slab to gym center
In Brazil, the use of reinforced concrete waffle slab in multi-story buildings is widespread nowadays. These buildings are projected for different purposes such as fitness centers, supermarkets, parking garages, offices and residential units. Simple activities as walking, skipping and jumping can generate vibrations in these slabs. Vibrations can cause incon
Lat. Am. j. solids struct.. Publicado em: 2014-12
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18. Concreto ultraleve® estrutural com pérolas de EPS: caracterização do material e estudo de sua aplicação em lajes / Structural ultra lightweight concrete with EPS beads: material characterization and study of its use in slabs
The use of lightweight concrete is mainly due to the benefits provided by reducing the density of the material such as smaller efforts on structures, economy of molds and scaffolding, as well as lower costs of transportation and erection of precast constructions. Currently, besides the technical and economic issues, the choice of building materials should ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/10/2012
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19. Análise teórico-experimental de pisos mistos de pequena altura / Experimental and theorical analysis of composite shallow floors
O piso misto usual é formado pela laje mista, de aço e concreto, apoiada na mesa superior da viga metálica. No piso misto de pequena altura, a laje mista se apoia na mesa inferior da viga, diminuindo assim a altura total do piso. A forma de aço, utilizada nesse sistema, tende a ser três vezes mais alta, que as formas de aço usuais. No Brasil não há u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2012
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20. Recomendações para projeto de lajes formadas por vigotas com armação treliçada / Recommendations for design of slabs with lattice reinforcement
As lajes formadas por vigotas pré-moldadas são utilizadas em larga escala no Brasil, em especial as formadas por vigotas treliçadas. As facilidades no manuseio e economia de fôrmas são algumas das vantagens do sistema. Apesar de serem muito utilizadas, ainda existe necessidade de estudo das recomendações no sentido de basear o projeto destas lajes. Os
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/08/2012
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21. NUMERICAL ANALYSIS OF THE BEHAVIOR OF FLAT SLABS PRESTRESSED CONCRETE FLOORS / ANÁLISE NUMÉRICA DO COMPORTAMENTO DE PAVIMENTOS CONSTITUÍDOS DE LAJES LISAS DE CONCRETO PROTENDIDO
Concrete flat slabs prestressed with unbounded greased strands have been used in building floors over the last years. This structural solution is ideal when the columns are regularly distributed. In addition, it is known that prestressed floors have some technical advantages when compared to the traditional solution in reinforced concrete, mainly in cases of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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22. Modelagem do comportamento estrutural estático e dinâmico de lajes nervuradas de concreto armado. / Modeling the static and dinamic structural behavior of reinforced concret slabs.
Several researchers have studied the use of reinforced concrete ribbed slabs in civil engineering structural systems that can be viable when the technical and economical point of view is considered. For this reason, a lot of papers were published in the last years based on the experimental and numerical analysis of this slab type. In this context, several sl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/01/2012
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23. Determination of the reinforced concrete slabs ultimate load using finite element method and mathematical programming
In the present paper, the ultimate load of the reinforced concrete slabs [16] is determined using the finite element method and mathematical programming. The acting efforts and displacements in the slab are obtained by a perfect elasto-plastic analysis developed by finite element method. In the perfect elasto-plastic analysis the Newton-Raphson method [20] i
Latin American Journal of Solids and Structures. Publicado em: 2012
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24. Lajes alveolares protendidas: cisalhamento em região fissurada por flexão / Prestressed hollow core slabs: shear in region fissured due to bending
Esta pesquisa teve como principal objetivo analisar o comportamento de lajes alveolares protendidas de uso corrente no Brasil (pequenas espessuras e alta protensão) quanto ao cisalhamento em região fissurada por ação do momento fletor, para diferentes situações: sem e com capa e com preenchimento parcial de alvéolos. Foi desenvolvido um estudo teóric
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011