Perforated steel block of realizing large ductility under compression: Parametric study and stress–strain modeling

Abstract On one hand, the nature of linear elastic up to brittle rupture hinders application fiber-reinforced polymer (FRP) bars as reinforcement in concrete member due displacement ductility demand structures. other FRP are equipped with many irreplaceable advantages To resolve this contradiction, a possible solution is use so-called compression yield (CY) structural system and beam incorporating CY comes from compressive side rather than tensile side. Thus, development material (CY material) well-designed mechanical properties (strength, stiffness, ductility) key challenge. In study, developed by perforating mild steel block then substantiated test results. Then, experimentally calibrated finite element models used conduct systematic parametric studies, based on which equations proposed predict stiffness ultimate strength material. Finally, theoretical constitutive stress–strain response perforated under reasonably acceptable agreement reached between model predictions