Time History Analysis of Tuned Mass Dampers in Steel Structures

Analyzing seismic activity stands as a crucial task in comprehending how structures react during earthquakes.Various systems have emerged to mitigate the impact of seismic forces, such as the Tuned Mass Damper (TMD), specifically designed to curtail building vibrations.With advancements like response spectrum analysis and time history analysis, our understanding of seismic response has improved significantly.Recognizing the importance of reducing structural vibration and displacement, especially in withstanding seismic loads beyond initial design parameters, we've learned to decrease the design base shear force.This reduction involves introducing a response reduction factor, considering a ductile structure's inelastic displacement capacity in dissipating structural energy.In this study, we delved into the behavior of a TMD within a steel frame structure subject to dynamic loading, notably with irregularities in the vertical direction.Evaluating the TMD's effectiveness relied on determining the response reduction coefficient.This coefficient derives from comparing the structure's response with and without the TMD.Both response spectrum and time history analyses of the TMD-equipped structure yielded more precise results regarding seismic loading, conforming to the IS code's nonlinear material performance criteria.