A Study of Seismic Behavior of Existing Steel Structures in IranUsing Cutting-Edge Technology of TADAS Dampers

Recent years have been witness to a surge in technologies for energy dissipation as a technique to enhanceseismic resistant constructions. Civil engineers had to date been paying utmost attention to Lateral LoadResisting Systems to the point that they ignored the importance of the management of the energy exertedon the structure. In times of earth quakes, a lot of energy is exerted on buildings, which must be broughtunder control or be dispersed irrespective of the components of the structure. This study investigates variousaspects of seismic performance of structures when such energy is unleashed. To achieve that end, passiveenergy dissipation systems such as TADAS (Triangular Added Damping & Stiffness) dampers may beused. Such systems help concentrate energy dissipation in dampers, reducing the necessity of energydissipation in the main components of the structure. This study analyzes the seismic performance of a ninestory steel structure augmented with TADAS dampers technology through nonlinear dynamic analyses, aswell as, several linear analyses. In dynamic nonlinear analyses, the reaction of the structure to several earthquakes with various intensities was recorded and compared with design spectrum for seismic design ofstructures. First, a static structure analysis was performed. The tension level was registered. Then thestructure was analyzed in seismic conditions. In order to investigate the effect of TADAS dampers onstructures, the reaction of structures in buildings with TADAS dampers was compared with those withoutTADAS dampers with respect to story drift, base shear, dissipated energy, and placement of structuralcomponents. It was found that TADAS dampers help to concentrate dissipated energy, thus reduce thepressure on other structure components.

A Study of Seismic Behavior of Existing Steel Structures in IranUsing Cutting-Edge Technology of TADAS Dampers Keywords:

TADAS Damper , Energy Dissipation , Non-linear Dynamic Analysis , Seismic Behavior , Steel Structures.