ADAPTIVE VIBRATION CONTROL OF NONLINEAR STEEL STRUCTURES USING DISPLACEMENT-DEPENDENT MASS DAMPER

Abstract

This paper proposes a nonlinear tuned mass damper (TMD) for reducing seismic damage to steel structures. This nonlinear TMD can be adaptively tuned according to the nonlinearity of a structure in terms of equivalent frequency. For optimized TMDs, numerical examples are demonstrated using simulated ground motions and historical earthquakes. The time history analysis shows that the proposed TMD holds satisfactory supplemental damping to buildings beyond its elastic range. The peak responses are well predicted using a proposed method based on the response spectrum method.