CYCLIC RESPONSE OF COMBINED METALLIC YIELDING DAMPER

Abstract

From a long time, structures are being subjected to earthquakes all across the world which even causes great damages the property, life and wealth. To reduce its effect on structures Earthquake resistant design practices are being followed in which two important factors are either to increase ductility and strength. But, in the past few decades certain new techniques are developed to reduce the effect of earthquakes on structures located on different soil conditions i.e., using passive damping devices like base isolators and dampers. This report will contain introduction to dampers and their types followed by the use of different metallic dampers like ADAS plate type and shear link type (shear plate type). As, metallic dampers are very easy to install and efficient therefore, they are widely used. In ADAS plate type metallic dampers inelastic deformations occur through flexural mode of yielding while in shear plate type yielding initiates via shear deformations of plate. To utilize the advantages of both ADAS plate and shear plate type metallic dampers, a combined metallic damper is developed in which ADAS plates and shear plates are arranged in parallel arrangement. In this arrangement, yielding occurs in both the modes flexure and shear. To study the behaviour of this arrangement in variation to the size, thickness and height of assembly a parametric study is conducted under lateral cyclic loading and parameters like lateral strength, energy dissipation, hysteretic curves etc. are compared.