"Smart" base isolation systems

This paper investigates the effectiveness of several base isolation strategies for historical earthquakes of various magnitudes and characteristics. The strategies studied herein include isolation systems with leadrubber bearings and with “smart” (semi-active) dampers. To demonstrate the advantages and disadvantages of the various approaches, historical earthquakes scaled to different magnitudes are used to excite an isolated building structure. Responses examined include: peak base and structural (relative) displacements, peak base and structural (absolute) accelerations, and peak applied forces. The adaptable nature of the smart damper system is shown to protect a structure from extreme earthquakes, without sacrificing performance during the more frequent, moderate seismic events.

[1]  Hisanori Otsuka,et al.  Optimal yield level of bilinear seismic isolation devices , 1999 .

[2]  Marvin W. Halling,et al.  Near-Source Ground Motion and its Effects on Flexible Buildings , 1995 .

[3]  D. Wald,et al.  Response of High-Rise and Base-Isolated Buildings to a Hypothetical Mw 7.0 Blind Thrust Earthquake , 1995, Science.

[4]  Michael D. Symans,et al.  Fuzzy logic control of bridge structures using intelligent semi‐active seismic isolation systems , 1999 .

[5]  Ian D. Aiken,et al.  AN ANALYTICAL HYSTERESIS MODEL FOR ELASTOMERIC SEISMIC ISOLATION BEARINGS , 1997 .

[6]  Erik A. Johnson,et al.  "Smart" Isolation for Seismic Control , 2000 .

[7]  Satish Nagarajaiah,et al.  Control of Sliding‐Isolated Bridge with Absolute Acceleration Feedback , 1993 .

[8]  Michael C. Constantinou,et al.  Semi-active control systems for seismic protection of structures: a state-of-the-art review , 1999 .

[9]  Jiahao Lin,et al.  An Introduction to Seismic Isolation , 1993 .

[10]  Y. Wen.  Method for Random Vibration of Hysteretic Systems , 1976 .

[11]  Faryar Jabbari,et al.  Robust control techniques for buildings under earthquake excitation , 1994 .

[12]  Billie F. Spencer,et al.  Controlling buildings: a new frontier in feedback , 1997 .

[13]  Satish Nagarajaiah,et al.  Response of Base-Isolated USC Hospital Building in Northridge Earthquake , 2000 .

[14]  Nicos Makris,et al.  RIGIDITY–PLASTICITY–VISCOSITY: CAN ELECTRORHEOLOGICAL DAMPERS PROTECT BASE‐ISOLATED STRUCTURES FROM NEAR‐SOURCE GROUND MOTIONS? , 1997 .

[15]  T. T. Soong,et al.  Base isolated structures with active control , 1987 .

[16]  James M. Kelly,et al.  Robust control of base-isolated structures under earthquake excitation , 1987 .

[17]  T. T. Soong,et al.  Passive Energy Dissipation Systems in Structural Engineering , 1997 .

[18]  Farzad Naeim,et al.  Design of seismic isolated structures : from theory to practice , 1999 .

[19]  Billie F. Spencer,et al.  Seismic Response Reduction Using Magnetorheological Dampers , 1996 .

[20]  James M. Kelly,et al.  The role of damping in seismic isolation , 1999 .

[21]  T. T. Soong,et al.  Random Vibration of Mechanical and Structural Systems , 1992 .

[22]  Andrei M. Reinhorn,et al.  Control of Sliding-Isolated Buildings Using Sliding-Mode Control , 1996 .

[23]  J. Doyle,et al.  Robust and optimal control , 1995, Proceedings of 35th IEEE Conference on Decision and Control.

[24]  Billie F. Spencer,et al.  Modeling and Control of Magnetorheological Dampers for Seismic Response Reduction , 1996 .

[25]  Roger P. Young,et al.  Seismic isolation design of the San Bernardino County Medical Center replacement project , 1996 .