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Doctoral Thesis
DOI
10.11606/T.3.2006.tde-22042007-214959
Document
Author
Full name
Leandro Mouta Trautwein
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2006
Supervisor
Committee
Della Bella, João Carlos (President)
Bittencourt, Túlio Nogueira
Campos Filho, Américo
Gomes, Ronaldo Barros
Pinheiro, Libânio Miranda
Title in Portuguese
Punção em lajes cogumelo de concreto armado: análise experimental e numérica.
Keywords in Portuguese
Análise experimental
Análise numérica
Armadura de cisalhamento
Concreto armado
Punção
Abstract in Portuguese
Este trabalho descreve uma pesquisa experimental de lajes cogumelo de concreto armado com armadura de cisalhamento, sem envolver a armadura de flexão. Onze lajes cogumelo quadradas de concreto com 200 mm de espessura e 3000 mm de lado, com uma área central carregada de 200 mm de lado, foram testadas até a ruptura. O principal objetivo dos ensaios foi investigar a eficiência de se utilizar esse tipo de armadura de cisalhamento sem envolver a armadura de flexão. Todas as lajes romperam por punção, com cargas de ruptura superiores em até 110%, em relação às cargas de ruptura em lajes similares sem armadura de cisalhamento, demostrando a eficiência da armadura. Foram realizadas também simulações numéricas utilizando modelos axissimétricos e tridimensionais, de lajes cogumelo de concreto armado, com o objetivo de reproduzir numericamente alguns resultados obtidos por pesquisadores e documentados na literatura, validando a parte experimental e a modelagem numérica. As simulações numéricas nãolineares foram realizadas com programa DIANA, e o modelo de fissuração do concreto adotado foi o distribuído (smeared crack). Foram analisados os resultados de cargas últimas e tipos de ruptura, fissuração, deformações nas armaduras e no concreto e as curvas carga x deslocamento.
Title in English
Punching in reinforced concrete flat slabs: experimental and numerical analysis.
Keywords in English
Experimental analysis
Numerical analysis
Punching
Reinforced concrete
Shear reinforcement
Abstract in English
This work reports experimental research of reinforced concrete flat slabs with use of shear reinforcement not embracing the flexural reinforcement. Eleven square reinforced concrete flat slabs with 200 mm thickness and 3000 mm side lengths, with a square central column of 200mm of side, were tested up to failure. The main objective was to investigate the efficiency of using the mentioned shear reinforcement. All slabs failed by punching and the ultimate loads were superior in up to 110% in relation to slabs without shear reinforcement, demonstrating the efficiency of the reinforcement. The numerical simulations using axisymmetric and three dimensional analyses, of reinforced concrete flats slabs, were carried out with the objective of reproducing some experimental results reported by different investigators, validating the experimental part and also the numerical modelling . The numerical simulations were performed with the software package DIANA, adopting the smeared crack approach to reproduce the concrete behaviour under shear and tension. The evaluated results were mode of failure, strain in steel and loaddeflections curves.
 
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ANEXOI.pdf (227.08 Kbytes)
ANEXOII.pdf (1.38 Mbytes)
TESEfinal.pdf (7.10 Mbytes)
Publishing Date
2007-04-23
 
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