Response Control of Full-Scale Irregular Buildings Using Magnetorheological Dampers

This paper considers the capabilities of semiactive control systems using magnetorheological dampers when applied to numerical models of full scale asymmetric buildings. Two full scale building models exhibiting coupled lateral and torsional motions are studied. The first case considered is a nine-story building with an asymmetric structural plan. The footprint of this building is rectangular, but the asymmetry is due to the distribution of shear walls. The second case considered is an L-shaped, eight-story building with additional vertical irregularity due to setbacks. Linear, lumped-parameter models of the buildings are employed herein to evaluate the potential of the control system to effectively reduce the responses of the buildings. In each case a device placement scheme based on genetic algorithms is used to place the control devices effectively. The proposed control systems are evaluated by simulating the responses of the models due to the El Centro 1940 and the Kobe 1995 earthquakes. In the second case, simulations are conducted using two-dimensional ground motions. The performance of the proposed semiactive control systems are compared to that of both ideal active control systems and passive control systems.

[1]  Mahendra P. Singh,et al.  Tuned mass dampers for response control of torsional buildings , 2002 .

[2]  Shirley J. Dyke,et al.  Application of magnetorheological dampers to seismically excited structures , 1999 .

[3]  Shirley J. Dyke,et al.  Semiactive Control Strategies for MR Dampers: Comparative Study , 2000 .

[4]  N. Wongprasert,et al.  Application of a genetic algorithm for optimal damper distribution within the nonlinear seismic benchmark building , 2004 .

[5]  Shirley J. Dyke,et al.  An experimental study of MR dampers for seismic protection , 1998 .

[6]  Anil K. Chopra,et al.  Understanding and predicting effects of supplemental viscous damping on seismic response of asymmetric one‐storey systems , 2001 .

[7]  Semih S. Tezcan,et al.  Parametric analysis of irregular structures under seismic loading according to the new Turkish Earthquake Code , 2001 .

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

[9]  Mahendra P. Singh,et al.  Optimal placement of dampers for passive response control , 2002 .

[10]  Shirley J. Dyke,et al.  Experimental verification of multiinput seismic control strategies for smart dampers , 2001 .

[11]  Rakesh K. Goel,et al.  Seismic behaviour of asymmetric buildings with supplemental damping , 2000 .

[12]  Dikai Liu,et al.  Multi‐level design model and genetic algorithm for structural control system optimization , 2001 .

[13]  Shirley J. Dyke,et al.  Benchmark Control Problems for Seismically Excited Nonlinear Buildings , 2004 .

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

[15]  T. T. Soong,et al.  Structural Control: Basic Concepts and Applications , 1996 .

[16]  Osamu Yoshida,et al.  Seismic Control of a Nonlinear Benchmark Building using Smart Dampers , 2004 .

[17]  Makola M. Abdullah,et al.  Placement of sensors/actuators on civil structures using genetic algorithms , 2001 .

[18]  Osamu Yoshida,et al.  Experimental verification of torsional response control of asymmetric buildings using MR dampers , 2003 .

[19]  Billie F. Spencer,et al.  On the current status of magnetorheological dampers: seismic protection of full-scale structures , 1997, Proceedings of the 1997 American Control Conference (Cat. No.97CH36041).