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Contribuições ao planejamento de experimentos em projetos de pesquisa de engenharia civil

Authors: Dal Molin, Denise Carpena Coitinho; Kulakowski, Marlova Piva; Ribeiro, Jose Luis Duarte;

Contribuições ao planejamento de experimentos em projetos de pesquisa de engenharia civil

Abstract

Conduzir experimentos planejados estatisticamente em projetos cujo objeto de estudo principal são os resultados obtidos de programas experimentais ainda não é uma constante nas pesquisas em Engenharia Civil. O planejamento estatístico de experimentos permite realizar análises mais refinadas dos dados, por meio de modelagem das variáveis de resposta. Além disso, pode-se empregar projetos fracionados, o que possibilita trabalhar com diversas variáveis de controle, em diversos níveis, sem tornar o experimento oneroso e reduzindo o tempo de execução dos experimentos. O presente trabalho discute as vantagens do planejamento de experimentos, de forma a contribuir para melhorar a qualidade dos métodos de pesquisa em programas experimentais. São apresentados alguns exemplos de planejamento de experimentos na área de tecnologia de materiais de construção, indicando os principais benefícios alcançados. Além disso, são apresentadas as análises de dados obtidas a partir de experimentos completos e fracionados, concluindo-se que essencialmente a mesma informação pode ser obtida a partir de experimentos fracionados que seguem os conceitos estatísticos.

The use of statistically designed experiments in research projects that involve the analysis of results from experimental programmes is not common in Civil Engineering. The statistical design of experiments allows for the refined analysis of data, obtained from the modelling of response variables. Moreover, fractional designs can be used to work with several control variables, at different levels, without making the study expensive and reducing the necessary time for the realization of experiments. This article discusses the advantages of using experiment designs, in order to make a contribution for improving the quality of research methods that involve experimental programmes. Some examples of experiment design in the field of construction materials technology are described, indicating the main benefits achieved. Also, data analysis obtained from complete and fractional experiments are presented, indicating that the same information obtained from complete experiments can be obtained from fractional experiments following statistical criteria.

Keywords

Planejamento de experimentos, Materiais de construção, Fractional factorial design, Construction materials, Experiment design

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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