Seismic response of high-rise buildings through metaheuristic-based optimization using tuned mass dampers and tuned mass dampers inerter

This paper presents a methodology for the tuning process of tuned mass dampers (TMDs) and tuned mass dampers inerter (TMDIs) positioned at the upper story of high-rise buildings under seismic excitations. A numerical study is conducted through the best fitness design values found through the optimization of three objective functions in the time domain by using a metaheuristic optimization, based on the differential evolution method (DEM): (1) minimizing the horizontal peak displacements; (2) minimizing the root mean square (RMS) response of displacements; and (3) minimizing the horizontal peak acceleration floor. The proposed methodology is applied to a 12-story, a 32-story, and a 37-story case-studies determined from actual building structures, and the optimum results are verified through a set of eight accelerograms of recorded earthquakes. The comparisons with the existing approaches show the feasibility of the DEM-based optimization. After evaluating the seismic performance, the results show a clear trend amplifying displacements as inertance values increase, and consequently, an improved seismic response is attained in the case-studies controlled via TMD. Finally, the effectiveness of classic TMDs optimally designed by DEM over TMDIs is demonstrated