HYBRID PREVIEW CONTROL OF STRUCTURES UNDER EARTHQUAKE EXCITATIONS

Passive, active and hybrid vibration control of structures during earthquakes were studied. Particular attention was given to hybrid preview control strategy for protection of structures against earthquakes. A three-story building under fixed-base condition and with laminated rubber bearing base isolation system subject to the El Centro 1940 earthquake were analyzed. The cases that an active control system with and without preview was present were studied in details. The corresponding structural responses with passive, active and hybrid vibration control systems were evaluated. Accelerations and displacements responses for active systems with and without preview sensors for fixed-base and base-isolated structures were computed and the results were compared with those for the unprotected building. It was shown that properly designed passive, active and hybrid control systems could effectively reduce the acceleration transmitted to structures during a major earthquake. It was also shown that the inclusion of the preview sensors in the active control strategy improved the system performance considerably. The hybrid use of the laminated rubber bearing isolation system with the active control strategies could provide significant improvement of the protection of buildings during seismic events.

[1]  Lawrence A. Bergman,et al.  Multiobjective optimal structural control of the Notre Dame building model benchmark , 1998 .

[2]  Goodarz Ahmadi,et al.  INTEGRATED PASSIVE/AcTIVE VIBRATION ABSORBER FOR MULTISTORY BUILDINGS , 1997 .

[3]  Leonard Meirovitch,et al.  Dynamics And Control Of Structures , 1990 .

[4]  Ahsan Kareem,et al.  Real‐time model predictive control of structures under earthquakes , 2001 .

[5]  Masayoshi Tomizuka,et al.  The optimal finite preview problem and its application to man-machine systems. , 1974 .

[6]  Goodarz Ahmadi,et al.  Satellite active and passive vibration control during liftoff , 1996 .

[7]  G. Bekey,et al.  Optimum Pulse Control of Flexible Structures , 1981 .

[8]  Fanis Giannopoulos,et al.  Active Tendon Control of Structures , 1978 .

[9]  Mohamed Abdel-Rohman,et al.  Automatic Active Control of Structures , 1980 .

[10]  Fanis Giannopoulos,et al.  ACTIVE CONTROL OF TWO-CABLE-STAYED BRIDGE , 1979 .

[11]  Goodarz Ahmadi,et al.  A comparative study of performances of various base isolation systems, part II: Sensitivity analysis , 1990 .

[12]  Javad Marzbanrad,et al.  OPTIMAL PREVIEW CONTROL DESIGN OF AN ACTIVE SUSPENSION BASED ON A FULL CAR MODEL , 2003 .

[13]  Javad Marzbanrad,et al.  Stochastic optimal preview control of a vehicle suspension , 2004 .

[14]  T. T. Soong,et al.  STRUCTURAL CONTROL: PAST, PRESENT, AND FUTURE , 1997 .

[15]  B. F. Spencer,et al.  Active Structural Control: Theory and Practice , 1992 .

[16]  E. K. Bender,et al.  Optimum Linear Preview Control With Application to Vehicle Suspension , 1968 .

[17]  Aleksander Hac,et al.  Optimal Semi-Active Suspension with Preview based on a Quarter Car Model , 1991, 1991 American Control Conference.

[18]  Javad Marzbanrad,et al.  Optimal preview active control of structures during earthquakes , 2004 .

[19]  Takuji Kobori,et al.  Linear quadratic regulator for structure under on-line predicted future seismic excitation , 1996 .

[20]  James M. Kelly,et al.  Aseismic base isolation: review and bibliography , 1986 .

[21]  Billie F. Spencer,et al.  Feedback-feedforward control of structures under seismic excitation☆ , 1990 .

[22]  Goodarz Ahmadi,et al.  Optimal Active Control of Vehicle Suspension System Including Time Delay and Preview for Rough Roads , 2002 .

[23]  T. T. Soong,et al.  State-of-the-art review: Active structural control in civil engineering , 1988 .

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

[25]  Shirley J. Dyke,et al.  Phenomenological Model of a Magnetorheological Damper , 1996 .

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

[27]  A. Hać,et al.  Optimal Design of Active and Semi-Active Suspensions Including Time Delays and Preview , 1993 .

[28]  T. T. Soong,et al.  Acceleration Feedback Control of MDOF Structures , 1996 .

[29]  Goodarz Ahmadi,et al.  Multi-story base-isolated buildings under a harmonic ground motion — Part I: A comparison of performances of various systems , 1990 .

[30]  Goodarz Ahmadi,et al.  A comparative study of performances of various base isolation systems, part I: Shear beam structures , 1989 .

[31]  Masayoshi Tomizuka,et al.  “Optimum Linear Preview Control With Application to Vehicle Suspension”—Revisited , 1976 .

[32]  T. Soong,et al.  Modal Control of Multistory Structures , 1976 .

[33]  Goodarz Ahmadi,et al.  Performance analysis of aseismic base isolation systems for a multi-story building , 1991 .

[34]  M. Khodaverdian,et al.  Dynamics of resilient‐friction base isolator (R‐FBI) , 1987 .

[35]  Aleksander Hac.  Optimal Linear Preview Control of Active Vehicle Suspension , 1992 .

[36]  Mohamed Abdel-Rohman,et al.  Active Control of Flexible Structures , 1978 .