Parametric Study to Maximize the Useful Life of Reinforced Concrete Columns

Abstract

The current scenario of structural engineering is guided by the growing ecological concern and constant search for efficient and economic structural solutions. In this sense, aspects related to the durability of structures have become a significant topic of study. Based on this context, the purpose of this work was to provide resources that allow the maximization of the useful life of reinforced concrete columns during the design phase. To achieve this objective, different scenarios were simulated for the properties of concrete and environmental properties and the corresponding transversal cross-sections were defined with the usage of an optimization method. The results obtained showed that the parameters that most interfere in the durability of the structure are the covering thickness and the compression strength. It was found that the durability increases significantly when the concrete strength increases and similar behavior was observed when the thickness of the covering is increased. Regarding optimization, it was noted that to higher compressive strengths of concrete the cost of the column section is reduced. The results of the developed study provided subsidies for maximizing the useful life of reinforced concrete columns in the design phase. Supported by the study, it was also observed the high sensitivity of the useful life to changes in coverage and properties of concrete. It was also concluded that the increase in compressive strength not only increases durability but also has the propensity to reduce the cost of the structure.