Performance Evaluation of Tall Buildings using Optimized Tuned Mass Damper

Mohammad Shamim Miah

doi:10.38032/jea.2020.04.011

Authors

Mohammad Shamim Miah Department of Civil Engineering, International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh

DOI:

https://doi.org/10.38032/jea.2020.04.011

Keywords:

Optimization, Vibration Mitigation, TMD, Tall-building, Dynamic Loads

Abstract

This study investigates the performance of tall buildings using tuned mass damper (TMD) under dynamic loads such as harmonic loads, and the Loma Prieta Earthquake 1989 data. The numerical investigations are performed by considering a sixteen-storied dynamical system. To do this end, the aforementioned system is considered to be uncontrolled (meaning no damper is used) and a controlled case is assumed where a TMD is placed on the top floor. TMD performance mainly relies on the set of parameters (mass ratio, damping ratio, and stiffness). In reality, the tuning process of those parameters take serious effort and gets worse with the complicacy of the structure. Hence to obtain better performance of the TMD the damping ratio and the frequency of the TMD are optimized by using unconstrained derivative-free method. Finally, the uncontrolled and controlled performance of the sixteen-storied structure has been evaluated and compared. The results show that the dynamical response of the studied problem can be reduced significantly via the use of optimized parameters.

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