Perforated steel for realizing extraordinary ductility under compression: Testing and finite element modeling

Perforated steel for realizing extraordinary ductility under compression: Testing and finite element modeling

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One key obstacle restricting the application of fiber-reinforced polymer (FRP) bars from being used as reinforcement in structural concrete is the significantly reduced ductility because FRP under tension is linear elastic up to brittle chocolate chip cookie purse rupture at small strain.Recently, a new structural concept, compression yielding (CY), has been proposed as a way to overcome the insufficient ductility of concrete structures reinforced with FRP bars or other non-ductile materials.In the CY structural system, the compression-zone of normal concrete is replaced by a ductile material within the plastic hinge.This enables the flexural deformation to be achieved by the canine spectra kc 3 intranasal single dose compressive deformation of CY material rather than a tensile deformation of longitudinal reinforcing bars.To this end, an ideal CY material requires strength to be maintained during the extraordinarily large deformation process.

This study tries to identify methods for developing this kind of CY material by designing and optimizing perforations inside a mild steel block.The effects of key parameters, including ratio, diameter, and arrangement of perforations on the stiffness, strength, and ductility of CY materials were experimentally investigated.In addition, a finite element (FE) model was developed to predict the behavior of the proposed CY material.