Abstract
Knowledge obtained in research and project practice contributed to upgrade the Brazilian standard regarding the dimensioning of concrete structures in 2014. The objective of the study is to evaluate the influence in the budget on the structure of an edifice due to changes in the standard ABNT NBR 6118:2014: use of different aggregates and of high-strength concrete. A building structure of reinforced concrete sized according to standards ABNT NBR 6118:2007 and ABNT NBR 6118:2014, considering different hypotheses. The simulations were performed with the software AltoQi Eberick (2014). The quantitative materials (steel, concrete, forms and expanded polystyrene to slabs) and inputs budget for structure were performed for each simulation. The type of aggregate influenced up to 4.60% of cost of the structure and up to 0.82% in overall cost in comparison with previous version of the standard. The use of C60 concrete compared with to C25 increased the budget of the structure (For the same aggregate type, the increase was, in average, of 14%). Although the use of steel and molds reduced (averaged 5%), it was not sufficient to eliminate the difference in the cost of concrete for edifice analyzed.
Highlights
The structure of a building must be able to resist the actions and transmit to the soil, through the foundations
The ABNT NBR 6118:2014 (Associação Brasileira de Normas Técnicas [ABNT], 2014) was launched in May 2014 to update the standardization of concrete use in Brazil
This version was corrected in August 2014 and brings updates and new procedures, compared to ABNT NBR 6118: 2007 (Associação Brasileira de Normas Técnicas [ABNT], 2007), that will influence the development of a structural project of reinforced concrete
Summary
The structure of a building must be able to resist the actions and transmit to the soil, through the foundations. Reinforced concrete is the most popular structural material in the world. The high capacity and employability of the material allow it to be used in different situations. Knowledge obtained by means of research works and projects practice enable innovation and updating of. The ABNT NBR 6118:2014 (Associação Brasileira de Normas Técnicas [ABNT], 2014) was launched in May 2014 to update the standardization of concrete use in Brazil. This version was corrected in August 2014 and brings updates and new procedures, compared to ABNT NBR 6118: 2007 (Associação Brasileira de Normas Técnicas [ABNT], 2007), that will influence the development of a structural project of reinforced concrete
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