Estudo comparativo de sistemas estruturais – Estudo de caso

Abstract

The search for more economic structures, with more effective constructions systems is a trend of the construction industry. In this work a comparison was made between quantity of materials and costs of steel, concrete and shape among 9 structures in reinforced concrete, varying the type of slab (massive, ribbed and smooth) and the height of the building in 10, 20 e 30 floors, maintaining the same distance between the axes of the pillars for all cases – 7,5m. For the calculations and dimensioning of structures, were observed the normative recommendation contained into NBR 6118:2014 – Design of concrete structures – Procedure, NBR 15.200/2012 – Fire design of concrete structures e NBR 14.432/2001 – Fire resistance requirements for building construction – Procedure. After a brief bibliographic review on the structural systems addressed, the structures were modeled in a computational tool, obtaining from this software the summaries of quantitative and material costs. From the results it was verified that the system constituted by ribbed slabs supported on beams was the most economical for the conditions adopted in this study, in all verified cases.