• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Doctoral Thesis
DOI
https://doi.org/10.11606/T.18.2006.tde-28112006-171927
Document
Author
Full name
Fernando Menezes de Almeida Filho
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2006
Supervisor
Committee
Debs, Ana Lucia Homce de Cresce El (President)
Barbosa, Monica Pinto
Hanai, Joao Bento de
Pinto Junior, Newton de Oliveira
Sousa, Jose Luiz Antunes de Oliveira e
Title in Portuguese
Contribuição ao estudo da aderência entre barras de aço e concretos auto-adensáveis
Keywords in Portuguese
aderência
análise experimental
arrancamento
concreto auto-adensável
concreto convencional
flexão
simulação numérica
Abstract in Portuguese
A busca por novos materiais estruturais visa a melhoria da qualidade e desempenho das estruturas, impulsionando o desenvolvimento científico e tecnológico. O concreto auto-adensável surgiu da necessidade de se dispensar o difícil e oneroso trabalho de vibração do concreto, sendo definido como um material capaz de fluir dentro de uma fôrma, passando pelas armaduras e preenchendo a mesma, sem o uso de equipamentos de vibração. Esta pesquisa caracteriza-se como um estudo teórico-experimental da aderência aço-concreto, utilizando concreto do tipo auto-adensável, mediante ensaios monotônicos de flexão em vigas e de arrancamento seguindo o modelo padrão do Rilem-Ceb-Fip (1973). O estudo considerou como parâmetros fundamentais o tipo de concreto (auto-adensável e convencional), a resistência à compressão do concreto e os diâmetros das barras. Ainda, realizou-se um estudo com relação à variabilidade do concreto auto-adensável nos estados fresco e endurecido, constatando que este possui pequena variação. De posse dos resultados, buscou-se verificar a previsão das formulações empregadas na literatura e pelos principais códigos internacionais. De acordo com os resultados, o comportamento dos modelos de viga e de arrancamento para ambos os concretos foi similar, mostrando que o concreto auto-adensável possui características semelhantes ao concreto convencional, com as vantagens da trabalhabilidade no estado fresco. Quanto à análise numérica, os modelos desenvolvidos representaram de forma satisfatória o comportamento dos ensaios, e forneceram uma idéia do comportamento da tensão de aderência na sua interface. Com relação às formulações teóricas, verificou-se que tanto para o concreto convencional quanto para o auto-adensável, ocorre uma superestimativa da resistência de aderência.
Title in English
Contribution to the study of the bond between steel bars and self-compacting concrete
Keywords in English
bond
experimental analysis
flexure
numerical simulation
ordinary concrete
pull-out
self-compacting concrete
Abstract in English
The search for new structural materials aims the improvement of the structures performance, pushing the scientific and technological development. Self-compacting concrete (SCC) origin was due to the need to avoid the difficult and expensive process of concrete vibration. It has been defined as a material capable to flow inside a formwork, passing through the reinforcement and filling it completely, without using of any special equipment. This research is characterized as a theoretical and experimental study of steel-concrete bond, using SCC, through pull-out tests and beam tests standardized by Rilem-Ceb-Fip model. The study considered as main parameters the concrete type (ordinary concrete and SCC), its compressive strength and the steel bars diameters. Yet, a study of the variability of the properties of SCC, both in fresh and hardened state was also performed, showing that SCC is a very reliable material. The obtained results were compared with the ones established by the related bibliography and by the main international codes. According to the results, the behavior of the beams and pull-out tests were very similar for both concretes (SCC and OC), with the well know advantages for the SCC in fresh state. About the numerical approach, the developed models represented satisfactory the test behavior (beam and pull-out) and gave an idea of the bond stress behavior on the steel-concrete interface. About the theoretical formulations, it was verified the they usually overestimate the bond strength, for both types of concrete.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2006-12-01
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • Almeida Filho, F.M., et al. Hardened properties of self-compacting concrete A statistical approach [doi:10.1016/j.conbuildmat.2010.02.032]. Construction & Building Materials [online], 2010, vol. 24, p. 1608-1615.
  • Almeida Filho, F.M., El Debs, M. K., and El Debs, A.L.H.C. Numerical approach of the bond stress behavior of steel bars embedded in self-compacting concrete and in ordinary concrete using beam models [doi:10.1590/S1983-41952013000300009]. Revista IBRACON de Estruturas e Materiais [online], 2013, vol. 6, p. 499-512.
  • ALMEIDA FILHO, Fernando Menezes de, et al. Variability of the bond and mechanical properties of self-compacting concreteVariability of the bond and mechanical properties of self-compacting concrete. Revista IBRACON de Estruturas e Materiais, 2008, vol. 1, p. 31-57.
  • ALMEIDA FILHO, Fernando Menezes de, and DEBS, A. L. H. C. E. Pull-out behavior of deformed bars using high-strenght self-compacting concrete and high-strenght ordinary concrete. Revista IBRACON de Estruturas, 2006, vol. 2, p. 44-55.
  • ALMEIDA FILHO, Fernando Menezes de, DEBS, Mounir Khalil El, and DEBS, A. L. H. C. E. Bond-slip behavior of self-compacting concrete and vibrated concrete using pull-out and beam tests [doi:10.1617/s11527-007-9307-0]. Materials and Structures [online], 2008, vol. 41, p. 1073-1089.
  • ALMEIDA FILHO, Fernando Menezes de, e El Debs, A.L.H.C. Análise numérica da aderência em modelos de viga com concretos auto-adensáveis e concretos convencionais. Cadernos de Engenharia de Estruturas (USP), 2009, vol. 11, p. 77-92.
  • ALMEIDA FILHO, Fernando Menezes de, e El Debs, A.L.H.C. Avaliação do comportamento da aderência entre barras de aço a concretos auto-adensáveis. Cadernos de Engenharia de Estruturas (USP), 2006, vol. 8, p. 25-28.
  • ALMEIDA FILHO, Fernando Menezes de, et al. . Experimental and numerical analysis of pull-out tests using high-strength self-compacting concrete (HSSCC) and high-strength ordinary concrete (HSOC). In INTERNATIONAL CONGRESS FEDÉRATION INTERNATIONALE DU BETON, Nápoles, 2006. Proceedings Nápoles, Itália: fib Itália, 2006., 2006.
  • ALMEIDA FILHO, Fernando Menezes de, DEBS, A. L. H. C. E., and DEBS, Mounir Khalil El. Evaluation of the bond strength behavior between steel bars and high strength fiber reinforced self-compacting concrete at early ages. In fib2008 symposium Tailor Made Concrete Structures, Amsterdam, 2008. International FIB Symposyum 2008 Anais., 2008.
  • ALMEIDA FILHO, Fernando Menezes de, DEBS, A. L. H. C. E., and DEBS, Mounir Khalil El. Evaluation of the numerical response of the bond behavior in the beam test model. In RADIÉ, J. (Ed.). CONCRETE STRUCTURES STIMULATORS OF DEVELOPMENT FIB SYMPOSIUM DUBROVNIK,, Dubrovnik, 2007. Proceedings. Zagreb, Croácia: SECON, 2007.., 2007.
  • ALMEIDA FILHO, Fernando Menezes de, DEBS, Mounir Khalil El, e DEBS, A. L. H. C. E. Validação de um modelo numérico de ensaios de arrancamento com concreto de diferentes classes de resistência à compressão. In CONGRESSO IBERO LATINO-AMERICANO SOBRE MÉTODOS COMPUTACIONAIS EM ENGENHARIA, Porto, 2007. Proceedings... Porto, Portugal: APMTAC., 2007.
  • ALMEIDA FILHO, Fernando Menezes de, e DEBS, A. L. H. C. E. Evaluation of the bond behavior in pull-out tests using self-consolidating concrete. In 5º INTERNATIONAL ACI/CANMET CONFERENCE ON HIGH PERFORMANCE CONCRETE, Manaus, 2008. Proceedings. : American Concrete Institute, 2008.
  • ALMEIDA FILHO, Fernando Menezes de, e DEBS, A. L. H. C. E. Experimental behavior of pull-out tests with high-strength self-compacting concrete with high cohesion. In Congresso EPUSP sobre Estruturas de Concreto, São Paulo, 2006. Anais....São Paulo : EPUSP, 2006.
  • ALMEIDA FILHO, Fernandomenezes de, DEBS, Mounir Khalil El, and El Debs, A. L. H. C. Application of high strength fiber reinforced self-compacting concrete as a filling material in an innovative precast connection. In ANNUAL INTERNATIONAL FIB SYMPOSIUM, 11., London, June, 2009, Londres, 2009. : ANNUAL INTERNATIONAL FIB SYMPOSIUM, 11., London, June, 2009. Proceedings fib-CEB-FIP., 2009.
  • ALMEIDA FILHO, Fernandomenezes de, El Debs, A. L. H. C., and DEBS, Mounir Khalil El. Analysis Of Cruciform Connections Using Fibre Reinforced Self-Compacting Concrete Under Push-Out Tests. In PCI Annual Convention and National Bridge Conference, Salt Like City, 22-26 outubro 2011, Salt Lake City, 2011. Proceedings...PCI Annual Convention and National Bridge Conference, Salt Like City, 22-26 outubro 2011., 2011.
  • DEBS, A. L. H. C. E., NARDIN, Silvana de, and ALMEIDA FILHO, Fernandomenezes de. Steel-concrete interface: influence of contact parameters. In FIB Symposium Keep Concrete Attractive, Budapeste, 2005.
  • Reyes, F. G., et al. Bond strength behavior of self-compacting concrete under cyclic loading in pull-out tests. In ANNUAL INTERNATIONAL FIB SYMPOSIUM, 11., London, June, 2009., Londres, 2009. ANNUAL INTERNATIONAL FIB SYMPOSIUM, 11., London, June, 2009. Proceedings fib-CEB-FIP., 2009.
  • Reyes, F. G., et al. Experimental study of bond between steel bars and self-compacting concrete with steel fiber. In INTERNATIONAL fib CONGRESS EXHIBITION, 3./ PCI ANNUAL CONVENTION AND BRIDGE CONFERENCE, Washington, May 29 June 2, 2010, Washington, 2010. Proceedings Lausanne: The Precast/Prestressed Concrete Institute (PCI), 2010. p. 1-10. ISBN: 978-2-88394-096-3.., 2010.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.