Control of Seismic Vibrations of Structures Using Inactive Control Systems

Document Type : Original Article

Author

M.Sc. Grad., Civil Engineering Earthquake Orientation, Islamic Azad University Shabestar, Shabestar, Iran.

Abstract

One of the most important issues in structural engineering is finding ways to reduce the force to structural members of the building. The intense ground vibrations create lateral inertial forces in the structure, which makes the structure oscillate with a range proportional to its input energy. If the large share of this energy is spent on the structural motions, the seismic response will be considerably improved. Therefore, if a large amount of seismic energy can be wasted mechanically, the structure response can also be controlled without structural damage. The use of energy-dampening systems in buildings is responsible for the resilience of structural members during an earthquake and, as a result, prevents damage. One of the new and effective ways of coping with earthquakes is the use of a variety of active and passive dampers in the building industry. In the meantime, the selection of passive dampers is preferable because of low cost and more suitable technology than active dampers and their use in the country.
 
 

Keywords


 
-        Soong, T.T. and Dargush, G.F.(1997), "Passive Energy Dissipation Systems in Structural Engineering", John Wiley & Sons Ltd., London (UK) and New York (USA).
 
-        NEHRP, National Earthquake Hazard Reduction Program (1997), “NEHRP.
 
-        Recommended Provisions for Seismic Regulations for New Buildings and Other Structures", Federal Emergency Management Agency, Report No. FEMA 302, Washington, D.C., to be published.
-        Chopra, A.K.  (2001), "Dynamics of Structures", Theory and Application to Earthquake Engineering.
 
-        Julio, C.M. (1995), "Passive and Active Control of Structures", Presented for The Degree of Master of Sciense in Civil Engineering-Earthquake Engineering in Massachusetts Institute of Tchnology.
 
-        Ashour, S., Hanson R.D. and Scholl R.E.  (1993), "Effect of Supplemental Damping on Earthquake Response".
 
-        Aiken, I.D., Nims D.K., Whittaker A.S. and Kelly J.M. (1993), “Testing of Passive Energy Dissipation Systems", EERI, Earthquake Spectra, Volume 9, Number 3.
 
-        Anderson, D.L., Devall, R.H., Lofflor, R.J. and Vetura, C.E. (1999), “Preliminary Guidelines for the Non-Linear Analysis and Design of Hysteretic (Displacement Dependent) Energy Dissipation Devices in Buildings".
 
-        Mahmoodi, P. (1969), "Structural Dampers", ASCE, 95(8), pp.1661-1672.
 
-        Ross, D., Uangar, E.E., and Kerwin,    E.W.  (1959), “Damping of Plate Flexural Vibrations Means of Viscoelastic Laminar, Structural Damping", (ed., Ruzicka, E.J.), ASME, NY.
 
-        Morgenthaler, D.R. (1987), “Design and Analysis of Passive Damped Large Space Structures", Role of Damping in Vibration and Noise Control, ASCE, NY, pp.1-8.
 
-        Zhang, R.H., Soong, T.T. and Mahmoodi, P. (1989), "Seismic Response of Steel Frame Structures with Added Viscoelastic Dampers, ASCE, 18(5), pp.389-396.
 
 
-        Zhang, R.H. Soong, T.T. (1992), "Seismic Design of Viscoelastic Dampers for Structural Application", ASCE, 118(5), pp.1375-1392.
 
-        Chang, K.C., Lai, M.L., Soong, T.T., Hao, D.S. and Yeh, Y.C. (1993a), "Seismic Behavior and Design Guide Lines for Steel Frame Structures with Added Viscoelastic Damper", NCEER 93-0009, National Center for Earthquake Engineering Research, Buffalo, NY.
 
-        Ferry, J.D. (1980), "Viscoelastic Properties of Polymer", John Wiley, New York, NY.
-        Zimmer, M. (2000), "Characterization of Viscoelastic Materials for Use in Seismic Energy Dissipation Systems",    Master of Science Thesis, Department of Civil, Structural and Environmental Engineering, University at Buffalo, State University of New York, Buffalo, N.Y.
 
-        Zhang, R.H. and Soong, T.T. (1992), “Seismic Design of Viscoelastic Dampers for Structural Applications", ASCE, 118(5), pp.1375-1392.