The Study of EADAS Elliptical Steel Damper Function in Seismic Resisting of Steel Frames


1 M.Sc in Structural Engineering, Department of Civil Engineering, Faculty Member and the Instructor of RaghebEsfahani University

2 Associate Professor of Structural Engineering Institute, International Institute of Earthquake Engineering and Seismology, IIEE, Tehran

3 Assistant Professor of Structural Engineering, Department of Structural Engineering, azad Tehran south branch university


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.


[1] Soong, T., Dargush, G.F. (1997). “Passive Energy Dissipation Systems in Structural Engineering”. John Willey & Sons Ltd., New York, USA.
[2] Kelly, J.M., Skinner, R.I. and Heine, A.J. (September 1972). “Mechanisms of Energy Absorption in Special Devices for use in Earthquake Resistant Structures”. Bulletin of N.Z. Society for Earthquake Engineering, Vol.5, NO.3.
[3] Whittaker, A., Bertero, V., Alonso, J., Thompson C. (January 1989). “Earthquake Simulator Testing of Steel Plate Added Damping and Stiffness Elements”. Report No. UCB/EERC – 89/02, Earthquake Engineering Research Center, University of California, Berkeley.
[4] Hanson, R.D., Aiken, I.D., Nims, D.K., Richter, P.J., and Bachman, R.E. (1993). “State of the Art and Practice in Seismic Energy Dissipation”. Proceeding of ATC 17-1 Seminar on Seismic Isolation, Passive Energy Dissipation and Active Control, Applied Technology Council, 68-79, San Francisco, California.
[5] Stiemer, S.F., Godden, W.G., Kelly, J.M. (July 1981). “Experimental Behavior of Spatial Piping System With Steel Energy Absorbers Subjected to a Simulated Differential Seismic Input”. Report NO. UCB/EERC – 81/09, Earthquake Engineering Research Center, University of California, Berkeley, CA.
[6] Xia, C. and Hanson, R.D. (July 1992). “Influence of ADAS Element Parameters on Building Seismic Response” J, Structural Engineering, Vol. 118, NO.7.
[7] Tsai, K.C., Chen, H.W., Hong, C.P. Su, Y.F. (1993). “Design of Steel Triangular Plate Energy Absorbers for Seismic Resistant Construction, Earthquake Spectra”. 505-528, California, USA.
[8] SAP2000. Non-linear.Version 14. Computer Software. Computers and Structures, Inc. Berkley, CA.
[9] ABAQUS, Inc. (2004), ABAQUS Analysis
User’s Manual, Version 6.8.1, Pawtucket, Rhode Island.