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《Journal of Vibration and Shock》 2007-02
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SEMI-ACTIVE H_∞ CONTROL OF NONLINEAR SEISMIC RESPONSE FOR HIGH-RISE BUILDINGS

YAN Gui-yun,WU Guo-rong,CHEN Fu-quan(Department of Civil Engineering,Fujian University of Technology,Fuzhou 350007,China)  
Different from studies mostly focusing on the linear response control of civil engineering structures,a semi-active control strategy,in which the magnetorheological dampers are used as actuators,is presented for reducing nonlinear response of high-rise buildings.Based on the measured vector of floor accelerations and semi-active control forces,a Kalman-Bucy observer suitable for semi-active strategy is built to obtain the estimation of state vector.The proposed strategy takes the uncertainty effects of earthquake excitation into account.Numerical simulation is carried out for analyzing the nonlinear seismic responses of the controlled 20-story benchmark building,and the simulation results are compared to those of other control strategies.The results show that the developed semi-active strategy has good performance,can reduce the nonlinear seismic response of high-rise building efficiently and minimize the damages in the building structures caused by strong earthquakes.
【CateGory Index】: TU973.212
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