OPTIMIZATION OF TUNED MASS DAMPER TO MINIMIZE THE DISPLACEMENT

FECAN, NATHAN YULEO (2017) OPTIMIZATION OF TUNED MASS DAMPER TO MINIMIZE THE DISPLACEMENT. S1 thesis, UAJY.

	Text (Halaman Judul) TSI150000.pdf Download (638kB)
	Text (Bab I) TSI150001.pdf Download (304kB)
	Text (Bab II) TSI150002.pdf Download (220kB)
	Text (Bab III) TSI150003.pdf Download (335kB)
	Text (Bab IV) TSI150004.pdf Restricted to Registered users only Download (139kB)
	Text (Bab V) TSI150005.pdf Restricted to Registered users only Download (508kB)
	Text (Bab VI) TSI150006.pdf Download (223kB)

Abstract

Tuned mass dampers (TMDs) systems are one of the vibration controlled devices used to reduce the response of buildings subjected to lateral loadings such as wind and earthquake loadings. There has been many research of TMDs due to their simplicity. The optimization of properties of TMDs become one topic that will become the main topic in this research. The numerical optimization technique is used to compute the optimum values of TMD parameters that will minimize the maximum displacement of the structure. The concept of genetic algorithms is based on Charles Darwin’s theory of survival of the fittest. Genetic algorithm simulates the survival of the fittest among individuals over consecutive generation for solving a problem. The purpose of this research is to optimize the tuned mass damper parameter that are damping (kd) and damping system (cd). In this research a simple 20 stories building will be used for the simulations. The building is modeled as shear building. The TMDs will be added to the building in the top floor. In order to optimize the parameters of TMDs, Genetic algorithms (GAs) were used to help the optimization problems. For the comparison, different mass ratio with the range between 1% to 10% were us ed. The result of simulation shows that when mass ratio increased, frequency ratio will be decreased. When mass ratio increased, damping ratio of TMD will be increased. Then the building will be simulating subject earthquake ground accelerations such as El Centro 1940, Kobe 1995, Hachinohe 1968 and Northridge 1994 ground accelerations. The displacement of the structure without TMD in El Centro 1940, Kobe 1995, Hachinohe 1968 and Northridge 1994 ground accelerations are 0.244 m, 0.317 m, 0.312 m and 0.693 m, respectively. The acceleration of the structure without TMD are 6.545 m, 1.567 m, 4.31 m and 1.59 m, respectively. When applied with the 10% TMD, the displacement reduced by 18.95% to 0.198 m, 7.6 % to 0.293 m, 31.75% to 0.213 m and 20.10% to 0.554 m. For the acceleration reduced by 90% to 0.655 m, 90% to 0.157 m, 90% to 0.431 m, 90% to 0.159 m. The simulation of the optimized TMDs subject to earthquake ground accelerations show that the TMDs can reduce the displacement and acceleration of the building effectively.

Actions (login required)

View Item