Semnan University Press Journal of Rehabilitation in Civil Engineering 2345-4415 2 2 2014 08 01 The Study of EADAS Elliptical Steel Damper Function in Seismic Resisting of Steel Frames 40 45 207 10.22075/jrce.2014.207 EN Mehdi Najari Varzaneh M.Sc in Structural Engineering, Department of Civil Engineering, Faculty Member and the Instructor of RaghebEsfahani University Mahmood Hosseini Associate Professor of Structural Engineering Institute, International Institute of Earthquake Engineering and Seismology, IIEE, Tehran Abbas Akbarpoor Assistant Professor of Structural Engineering, Department of Structural Engineering, azad Tehran south branch university Journal Article 2013 09 14 The present article seek to investigate the function of elliptical steel damper function in steel frames seismic resisting. The elliptical damper is a kind of earthquake energy dissipater in structure which acts based on the steel yielding feature. Thus, this damper in frame lateral displacement mechanism is expected to have a satisfying hysteretic behavior in terms of energy absorption is on acceptable level. To study the EADAS (elliptical added damping and stiffness) elliptical damper function Abaqus software was used in seismic resisting of steel frames. To do the analysis one span- one floor which was modeled with eight kinds of suggested damper was used. The basis of the analysis method is based on the finite element method and a cyclic loading curve was used and the frame will be pushed to the failure of the dampers. The results of the present study indicates that through the addition of this damper with the damage focus in damper the structure elements remain in elastic zone and without any damage bear the lateral load. The damper causes an increase in ductility and the frame energy absorption hysteretic and it can be used for seismic resisting of steel frames. https://civiljournal.semnan.ac.ir/article_207_f1c09a6e6830c23c051828ef64a23a0c.pdf