scholarly journals Tuned Mass Dampers for the Mitigation of Impulsive Ground Motions

2012 ◽  
Author(s):  
E. Matta ◽  
R. Ceravolo ◽  
A. De Stefano ◽  
A. Quattrone ◽  
L. Zanotti Fragonara
Keyword(s):  
Ground Motions ◽  
Tuned Mass Dampers

scholarly journals Shared Tuned Mass Dampers for Mitigation of Seismic Pounding

2020 ◽  
Vol 10 (6) ◽  
pp. 1918 ◽  
Author(s):  
Rajesh Rupakhety ◽  
Said Elias ◽  
Simon Olafsson
Keyword(s):  
Ground Motions ◽  
Optimization Method ◽  
Large Set ◽  
Stiff System ◽  
Tuned Mass Dampers ◽  
Adjacent Building ◽  
Mass Damper ◽  
Stationary Mass ◽  
Real Earthquake ◽  
Seismic Pounding

This study explores the effectiveness of shared tuned mass damper (STMD) in reducing seismic pounding of adjacent buildings. The dynamics of STMDs is explored through numerical simulations of buildings idealized as single and multiple degree of freedom oscillators. An optimization method proposed in the literature is revisited. It is shown that the optimization results in two different solutions. The first one corresponds to the device being tuned to one of the buildings it is attached to. The second solution corresponds to a very stiff system where the TMD mass hardly moves. This solution, which has been described as an STMD in the literature, is shown to be impractical due to its high stiffness and use of a heavy stationary mass that plays no role in response mitigation but adds unnecessary load to the structure. Furthermore, it is shown that the second solution is equivalent to a viscous coupling of the two buildings. As for the properly tuned solution, i.e., the first solution, sharing the device with an adjacent building was found to provide no added benefits compared to when it is placed on one of the buildings. Based on results from a large set of real earthquake ground motions, it is shown that sharing a TMD mass with an adjacent building, in contrary to what is reported in the literature, is not an effective strategy.

An improved multi-mode seismic vibration control method using multiple tuned mass dampers

2022 ◽  
pp. 136943322110509
Author(s):  
Xuan Zhang ◽  
Qiang Han ◽  
Kaiming Bi ◽  
Xiuli Du
Keyword(s):  
Vibration Control ◽  
Control Method ◽  
Numerical Study ◽  
Ground Motions ◽  
Vibration Modes ◽  
Tuned Mass Dampers ◽  
Location Factor ◽  
Mass Damper ◽  
Multi Mode ◽  
Multiple Tuned Mass Dampers

Multiple vibration modes of an engineering structure might be excited by earthquake ground motions. Multiple tuned mass dampers (MTMDs) are widely used to control these multi-mode vibrations. However, in the commonly used MTMD system, the mass element in each tuned mass damper (TMD) is normally assumed to be the same. To improve the performance of MTMDs for seismic-induced vibration control, non-uniform MTMD masses are adopted in the present study to improve the mass utilization of TMD, and a location factor is proposed to determine the best location of each TMD in the MTMD system. The effectiveness of the proposed method is validated through numerical study. The results show that the proposed method effectively reduces the seismic responses of the structure induced by multiple vibration modes.

scholarly journals Seismic Response Mitigation of Base-Isolated Buildings

2020 ◽  
Vol 10 (4) ◽  
pp. 1230 ◽  
Author(s):  
Mohammad Hamayoun Stanikzai ◽  
Said Elias ◽  
Rajesh Rupakhety
Keyword(s):  
Fragility Curves ◽  
Ground Motions ◽  
Equations Of Motion ◽  
Numerical Approach ◽  
Probability Of Failure ◽  
Base Shear ◽  
Tuned Mass Dampers ◽  
Maximum Displacement ◽  
Mass Damper ◽  
Shear Type

Earthquake response mitigation of a base-isolated (BI) building equipped with (i) a single tuned mass damper at the top of the building, (ii) multiple tuned mass dampers (MTMDs) at the top of the building, and (iii) MTMDs distributed on different floors of the building (d-MTMDs) is studied. The shear-type buildings are modeled by considering only one lateral degree of freedom (DOF) at the floor level. Numerical approach of Newmark’s integration is adopted for solving the coupled, governing differential equations of motion of 5- and 10-story BI buildings with and without TMD schemes. A set of 40 earthquake ground motions, scaled 80 times to get 3200 ground motions, is used to develop simplified fragility curves in terms of the isolator maximum displacement. Incremental dynamic analysis (IDA) is used to develop simplified fragility curves for the maximum target isolator displacement. It is found that TMDs are efficient in reducing the bearing displacement, top floor acceleration, and base shear of the BI buildings. In addition, it was noticed that TMDs are efficient in reducing the probability of failure of BI building. Further, it is found that the MTMDs placed at the top floor and d-MTMDs on different floors of BI buildings are more efficient in decreasing the probability of failure of the BI building when compared with STMD.

scholarly journals Structural Control of RC Buildings Subjected to Near-Fault Ground Motions in terms of Tuned Mass Dampers

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Hosein Naderpour ◽  
Arian Kiani ◽  
Ali Kheyroddin
Keyword(s):  
Structural Control ◽  
Ground Motions ◽  
Rc Buildings ◽  
Tuned Mass Dampers ◽  
Near Fault
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