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Navegando por Assunto "Slabs"

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    Análise experimental de lajes lisas unidirecionais de concreto armado de alta resistência com metacaulim apoiadas em pilares retangulares e armadas à punção
    (Universidade Federal do Pará, 2006-03-02) CARVALHO, Adonay Saráty de; OLIVEIRA, Dênio Ramam Carvalho de; http://lattes.cnpq.br/1324105476558186
    Ten reinforced concret slabs were tested, using metakaolin and high strength concrete (cc f nearly 60 MPa), The slabs are submitted to central loading, with objective to analyze the influence of the rectangularity rate of the columms (min C CmÃx) and the stirrups in the increase of resistance. The inclined stirrups have used. The slabâs dimensions were (1.800 x 1.800 x 110) mm and the variables considered were the rectangularity rate of the columms and use the stirrups and distribution around the columm. Ultimate loads, deflections, fissure maps, ductility, concrete, stirrups and reinforcement strains and failure types. The experimental results are comparisons with other results of the codes. The numerical results are compared with experimental results. The experimental results indicate that increase of the rectangularity rate of the columms to make the shear forces concentrat around the colummâs ends, suggesting that the region the shear combat are most solicit. The inclinate stirrups have eficient increase in the resistance of the slab and to change the failure types in some slabs. Observed increases than 32% when the stirrups have to distribuite around the colummâs ends. The low capacity resist to flexion have limited the punching resistance.
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