SEISMIC BEHAVIOR OF BENCHMARK BUILDING WITH SEMI-ACTIVE VARIABLE FRICTION DAMPERS

The seismic response of 20-story benchmark building with semi-active variable friction dampers (SAVFD) is investigated under various earthquake ground motions. A recently proposed predictive control algorithm is employed. A parametric study is carried out to arrive at optimum value of gain multiplier so as to have maximum response reduction. The numerical study is carried out for the benchmark building installed with SAVFD and compared with passive and uncontrolled case. The effectiveness of dampers is studied in terms of the reduction in structural responses and performance criteria. To reduce the cost of dampers study is carried out with lesser number of dampers at appropriate locations. Results show that SAVFD reduces earthquake responses effectively with better performance in respect of acceleration response reduction as compared with passive dampers. In addition, it is observed that the lesser number of dampers at appropriate locations results similar response reduction which reduces cost of the dampers.

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