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PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros
The Use of Tuned Mass Dampers for Structural Vibration Control: Numerical Studies of Shear Buildings under Earthquakes and of a Pedestrian Bridge
M.M. Paredes and R.C. Barros
Department of Civil Engineering, Faculty of Engineering, University of Porto, Portugal
M.M. Paredes, R.C. Barros, "The Use of Tuned Mass Dampers for Structural Vibration Control: Numerical Studies of Shear Buildings under Earthquakes and of a Pedestrian Bridge", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 162, 2009. doi:10.4203/ccp.91.162
Keywords: structural vibration, tuned mass dampers, earthquake, damping.
This work concerns some research and development recently performed at the Faculty of Engineering of the University of Porto. The first part of the study is a parametric analysis of the performance of a tuned mass damper (TMD) in the mitigation of the effects of earthquakes in building-like structures. The targeted parameters in the analyses were the number of storeys of the buildings, the mass ratio µ of the TMD, and the earthquake input signals. The number of storeys of the buildings varied from 5 to 30 with increments of 5 storeys. The mass ratio of the TMD varied from 0.00 to 0.05 with increments of 0.01. The actions considered were two groups where earthquakes were generated by a random process. The first group is composed of eight earthquakes of long duration but with a high magnitude and the second group is composed of eight earthquakes with moderate magnitudes but of a shorter duration. The second part of the study addresses the control of vibrations of a pedestrian bridge at Porto. This exhibits high levels of vertical vibration when crossed by pedestrians, causing discomfort to its users. So it was considered a good example to simulate, by numerical means, the application of TMDs in controlling structural vibrations concerning comfort criteria.
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