EQUIVALENT VISCOUS DAMPING OF METALLIC FIBER-REINFORCED CONCRETE (MFRC)

Abstract

In this paper, results of an experimental study to investigate the equivalent viscous damping (EVD) of the concrete reinforced with metallic fibers in mono and hybrid form have been presented. Two types of metallic fibers were investigated: Fibra Flex and Dramix fibers. FibraFlex fibers develop strong bond with concrete due to their rough surface. On the contrary, Dramix fibers develop weak bond with concrete due to their smooth surface. Maximum dosage of fibers was kept equal to 40 kg/m3 . The findings of this study showed that EVD of concrete is improved with the addition of metallic fibers. Comparison of the effectiveness of two metallic fibers investigated in this study on EVD revealed that increase in the EVD was greater with Fibra Flex fibers up to 4 mm deflection in beam and after that Dramix fibers were found to be more effective to enhance EVD of concrete.