Abstract
The present study deals with the use of fiberglass reinforced polymer bars (GFRP) as a replacement for the common steel of a reinforced concrete circular pile, in order to avoid the corrosion of durability of reinforcing bars and thus improve them. The comparative analysis was carried out between a pile reinforced with GFRP and another with steel, where the ductility was evaluated by obtaining moment-curvature diagram. As a result, said idealized moment-curvature diagrams and ductility indices are presented, concluding the ductility of the section reinforced with GFRP in 20% more than that of steel.
Highlights
Fiberglass composite bars have emerged in recent years as a possible and efficient alternative to replace steel in reinforced concrete elements due to the problem corrosion [1]
An experimental research on moment-resisting frame reinforced with GFRP bars and steel bars subjected to lateral cyclic loads and axial loads was conducted [5]; it was observed that the GFRP-reinforced section developed greater elastic deformations than steel creep deformations
A comparative analysis of the moment-curvature diagrams of a circular crosssection of concrete reinforced with steel bars and GFRP bars subjected to axial load and lateral force was carried out
Summary
Fiberglass composite bars have emerged in recent years as a possible and efficient alternative to replace steel in reinforced concrete elements due to the problem corrosion [1]. A series of tests on columns reinforced with fiberglass bars and carbon bars subjected to axial load was carried out and it was developed an analytical method for determining the moment-curvature diagram and the lateral displacement [6]. In this investigation, a comparative analysis of the moment-curvature diagrams of a circular crosssection of concrete reinforced with steel bars and GFRP bars subjected to axial load and lateral force was carried out. The diagrams were idealized into trilinear curves in order to assess the index of ductility curvature for both types of reinforcement through a program code made in MATLAB [7]
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