Precast Beam
Mostrando 13-24 de 24 artigos, teses e dissertações.
-
13. Comportamento de vigas protendidas pré-moldadas com ligações semi-rígidas.
The behaviour of prestressed precast beams is directly affected by the rotational stiffness of the end connections. Although the prestressed beam presents a linear behaviour in service, the effective behaviour of the precast beam depends on the interaction of the beam with the behaviour of its connections. The majority of the experimental investigations on s
Publicado em: 2007
-
14. Flexural strengthening and stiffness increasing of precast beam-to-column connections by NSM CFRP strips / Reforço e incremento da rigidez à flexão de ligações viga-pilar de estruturas de concreto pré-moldado com polímero reforçado com fibra de carbono (PRFC)
This work presents the development of a technique for flexural strengthening and stiffness increasing of precast beam-to-column connections by the embedding of FRP strips into grooves made on the concrete cover. According to this technique, the tension in the connection is transferred by the Near-Surface Mounted (NSM) FRP strips. To allow the transference of
Publicado em: 2007
-
15. Estudo da continuidade em ligações laje-viga-pilar em estruturas pré-moldadas de concreto
The present research deals with the study of continuity in slab-beam-column connections in precast concrete structures, wherein an experimental investigation about the contribution of longitudinal reinforced bars, passing on the side of the column in the top of the slab, on the connector flexural stiffness. For this study, a beam-to-column connection was sel
Publicado em: 2007
-
16. Interação entre painéis pré-moldados de concreto e a estrutura principal por meio de modelos numéricos em elementos finitos / Interaction between precast concrete panels and the main structure via numerical models in finite elements
Os painéis pré-moldados de concreto apresentam função arquitetônica e estrutural importante para as edificações, tendo o seu uso intensificado no Brasil. Estudos anteriores mostram a contribuição dos painéis em reduzir os esforços e deslocamentos da estrutura principal, resultando em estruturas mais econômicas. Este trabalho avalia a interação
Publicado em: 2007
-
17. Interaction between precast concrete panels and the main structure via numerical models in finite elements / InteraÃÃo entre painÃis prÃ-moldados de concreto e a estrutura principal por meio de modelos numÃricos em elementos finitos
Os painÃis prÃ-moldados de concreto apresentam funÃÃo arquitetÃnica e estrutural importante para as edificaÃÃes, tendo o seu uso intensificado no Brasil. Estudos anteriores mostram a contribuiÃÃo dos painÃis em reduzir os esforÃos e deslocamentos da estrutura principal, resultando em estruturas mais econÃmicas. Este trabalho avalia a interaÃÃo
Publicado em: 2007
-
18. Estudo experimental de uma ligação viga-pilar de concreto pré-moldado parcialmente resistente a momento fletor / Experimental study of a partial moment resistant beam-to-column connection in precast concrete
In this research the behavior of a partial moment resistant beam-to-column connection in precast concrete subjected to negative and positive moments was studied. This connection has two inclined dowels fixed to the beam with steel plate, washer and nut and a concrete cap with longitudinal reinforced bars passing trough the column. In the experimental program
Publicado em: 2006
-
19. Comportamento de elementos pré-moldados de concreto com ligações semi-rígidas. / Behaviour of concrete precast elements with semi-rigid connections.
O comportamento das vigas pré-moldadas de concreto armado é fortemente influenciado pela rigidez à flexão das ligações viga-pilar, existe uma interdependência entre a não linearidade da relação momento-curvatura ao longo da viga pré-moldada com a não linearidade da relação momento-rotação nas ligações viga-pilar. A maioria das investigaçõ
Publicado em: 2006
-
20. Estudo experimental da deformação ao longo do tempo de lajes contínuas e simplesmente apoiadas executadas com vigotas pré-moldadas de concreto.
This research deals with the experimental investigation of time dependent deformations in partially precast floors with composite beam-and-block floor systems made with reinforced concrete lattice joist through the measurement of deflections of prototypes with real dimensions. It is a continuation of several researches of composite beam-and-block floor syste
Publicado em: 2005
-
21. REDISTRIBUIÇÃO DE MOMENTOS EM VIGAS CONTÍNUAS EM ADUELAS PROTENDIDAS COM CABOS SINTÉTICOS EXTERNOS / MOMENT REDISTRIBUTION IN CONTINUOUS SEGMENTAL BEAMS PRESTRESSED WITH EXTERNAL SYNTHETIC TENDONS
An experimental investigation on the behavior of continuous segmental concrete beams, prestressed with external aramid tendons, was carried out. Four beams were tested; one was monolithic and the others were constructed in precast dry- jointed segments. All the beams had the same overall dimensions, with two spans and an I section 30 cm high, flange width of
Publicado em: 2003
-
22. Precast concrete beam-to-column connections: emphasis on the deformability analysis / Ligações viga-pilar de estruturas de concreto pré-moldado: análise com ênfase na deformabilidade ao momento fletor
The present research deals with the study of two types of precast beam-to-column connections with emphasis on the deformability analysis. The first one is extensively used in precast concrete portal frames with sloping beams. The second one is used in multi-storey framed structures. Experimental tests on two models of each type of beam-to-column connections
Publicado em: 2002
-
23. Contribuição ao estudo da instabilidade lateral de vigas pré-moldadas / On the lateral stability of precast concrete beams
The lateral stability of long and slender precast concrete beams requires great attention. In particular, it is important to ensure the stability of these members during transitory phases like tilting and transport, and also when the deformability of temporary supports is taken into account. The state of the art of the problem of lateral stability in precast
Publicado em: 2002
-
24. Contribuição ao estudo de lajes pre-fabricadas com vigas treliçadas
The pre-fabricated elements has been occupying its space more and more in the several buildings of Civil Engineering. The trussed slabs appeared as a variation of these elements. This work tried to meet the maximum information that facilitate to characterize this element in national level, as well as he is treated at European countries, like France. Through
Publicado em: 1998