Reliability-based evaluation of design guidelines for cold-formed steel-concrete composite beams

Chaves, Igor A.; Beck, André Teófilo; Malite, Maximiliano

doi:10.1590/s1678-58782010000500003

Cited by 12 publications

(7 citation statements)

References 8 publications

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“…This work is part of a larger project about the calibration, based on structural reliability, of the partial factors from Brazilian design codes. The calibration is being developed by the authors of this paper, though it has already been addressed in a preliminary way by Beck and Doria [5], Beck et al [6], Chaves et al [7] and Beck and Souza Jr. [8].…”

Section: Introductionmentioning

confidence: 99%

A new study of Brazilian concrete strength conformance

Santiago

Beck²

2017

Rev. IBRACON Estrut. Mater.

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A new study of Brazilian concrete strength conformance Um novo estudo da conformidade da resistência do concreto produzido no Brasil Abstract ResumoThis paper presents a new evaluation of the strength compliance of concretes produced in Brazil. It is based on experimental results of over twenty-seven thousand concrete samples from different parts of the country. Results show that a significant part of Brazilian concrete do not reach the characteristic strength (fck) specified in design, and the percentage of nonconforming samples tend to be higher than 5%. This study also reveals the concrete produced in the South and Midwest regions have less variability than the ones produced in the other regions of the country. These results emphasize the importance of a rigorous control in manufacturing and reception of concretes in order to reduce the nonconforming cases.Keywords: concrete strength compliance, concrete structures, structural safety.Este artigo apresenta uma nova avaliação da conformidade dos concretos atualmente produzidos no Brasil. Ela está pautada em resultados de ensaios de resistência à compressão axial de mais de vinte e sete mil corpos de prova de concretos moldados in loco, no ato de seu recebimento, em diferentes obras do país. Os resultados mostram que parte do concreto produzido no Brasil não alcança a resistência característica (fck) prevista em projeto, e que o percentual de amostras não conformes tende a ser superior a 5%. Este estudo também evidencia que os concretos produzidos nas regiões Sul e Centro-Oeste apresentam menor variabilidade que aqueles produzidos nas demais regiões do país. Estes resultados reforçam a importância de um controle rigoroso na fabricação e no recebimento do concreto visando diminuir a ocorrência de não conformidades.Palavras-chave: conformidade da resistência do concreto, estruturas de concreto, segurança das estruturas.

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Section: Introductionmentioning

confidence: 99%

A new study of Brazilian concrete strength conformance

Santiago

Beck²

2017

Rev. IBRACON Estrut. Mater.

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“…This research is part of a larger project about the calibration, based on structural reliability, of the partial safety factors of Brazilian design codes. The calibration is being developed by the authors of this paper, in a continuation to studies in Beck and Doria [5], Beck et al [6], Chaves et al [7] and Beck and Souza Jr. [8]. Although the results of this work serve a larger purpose, there is value in themselves, as they indicate the quality of concrete blocks manufactured in different regions of the country.…”

Section: Introductionmentioning

confidence: 86%

Study of brazilian structural concrete block conformity

Santiago

Beck²

2018

Rev. IBRACON Estrut. Mater.

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This paper presents a study of the conformity of structural concrete blocks manufactured and used in masonry construction in Brazil. It is based on compressive strength tests, on dimensional analysis and absorption tests of over six thousand samples from three classes (A, B and C) and two modular sizes (M-15 and M-20). National results show that blocks tend to have an estimated compressive strength higher than specified, except blocks from class A. Regional results show that blocks manufactured in the northeast (NE) are consistently non-conforming, for all block classes. The study also shows that dimensional variations and absorption tests results are within code tolerances.

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“…Finally, regarding the reliability of the design procedures for cold-formed steel-concrete composite beams adopted in Brazil, a reliability-based evaluation of design guidelines was proposed, aiming to verify possible improvements (Chaves et al, 2010).…”

Section: Composite Beamsmentioning

confidence: 99%

State of the art of steel–concrete composite structures in Brazil

Nardin¹,

Debs²

2013

Proceedings of the Institution of Civil Engineers - Civil Engin

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Steel-concrete composite structures are now increasingly used in Brazil and are the subject of significant research by the country's leading universities. This paper summarises the typology, state of the art and usage of steelcomposite structures from a Brazilian perspective. It presents the concepts, definitions and design philosophy for basic structural elements, including composite slabs, beams and columns, and also for various types of connections.Summaries of the extensive research findings are presented for each composite element. The paper concludes with a call for all the research results to be condensed into a single design manual, which in turn will help Brazil's fastgrowing construction industry take full advantage of the benefits of composite construction techniques.

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Reliability-based evaluation of design guidelines for cold-formed steel-concrete composite beams

Cited by 12 publications

References 8 publications

A new study of Brazilian concrete strength conformance

A new study of Brazilian concrete strength conformance

Study of brazilian structural concrete block conformity

State of the art of steel–concrete composite structures in Brazil

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