Semi-active control of wind-induced vibration of tall building using magneto-rheological dampers

摘要

Semi-active control has the adaptability of the active control to the external loadingsrnand the reliability of the passive control against the failure of the main power supply system. In thisrnstudy, a recently developed semi-active control system employing magneto-rheological(MR) fluidrndampers is applied to vibration control of a wind excited tall building. Numerical simulation studiesrnare performed to demonstrate the efficiency of the MR dampers on the third ASCE benchmarkrnproblem. Genetic algorithm is applied to determine the optimal locations and capacities of the MRrndampers. Clipped optimal controller is designed to control the MR dampers based on the accelerationrnfeedback. Simulation results show that the semi-actively controlled MR dampers can effectivelyrnreduce both the peak and RMS responses of the tall building under various winds force conditions.rnThe control performance of the MR dampers for the wind is fairly similar to thernperformance of an active tuned mass dampers.