Seismic Performance of Tuned Mass Dampers with Uncertain Parameters

2014 ◽  
pp. 57-83
Author(s):  
C. Adam ◽  
M. Oberguggenberger ◽  
B. Schmelzer
Keyword(s):  
Seismic Performance ◽  
Uncertain Parameters ◽  
Tuned Mass Dampers

scholarly journals Optimal design and performance evaluation of tuned mass damper inerter in building structures

2021 ◽  
Author(s):  
Daniel Caicedo Diaz ◽  
Luis Lara-Valencia ◽  
John Blandon
Keyword(s):  
Performance Evaluation ◽  
Case Studies ◽  
Seismic Performance ◽  
Passive Control ◽  
Control Device ◽  
Design Parameters ◽  
Building Structures ◽  
Tuned Mass Dampers ◽  
Seismic Accelerations ◽  
And Performance

This paper concerns the numerical performance evaluation of multi-degree-of-freedom systems equipped with Tuned Mass Dampers-Inerter (TMDIs); a passive control device used for the mitigation of mechanical vibrations induced by dynamic loads. The inerter device is commonly used to increase the apparent mass of classics tuned mass dampers (TMDs), improving its seismic performance. To evaluate the TMDI action, three case studies are employed, determined from three real buildings of Medellin city from low, medium to high rise (30 meters, 97 meters, and 144 meters, respectively). Optimum design parameters are found using a metaheuristic optimization based on the differential evolution method, first, for the minimization of the horizontal peak displacements, and then, for the minimization of the root mean square (RMS) response of displacements. Besides, the case studies are assessed using eight seismic accelerations records representative of the literature. Finally, the seismic performance is evaluated on each case study considering different levels of inertance induced by the inerter device: 5%, 20%, and 50% with respect to the total mass of the building, for which it is observed a better dynamic behavior when TMDIs with lower values of inertance are implemented.

scholarly journals Enhancement in the Seismic Performance of a Nuclear Piping System using Multiple Tuned Mass Dampers

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2077 ◽  
Author(s):  
Shinyoung Kwag ◽  
Jinsung Kwak ◽  
Hwanho Lee ◽  
Jinho Oh ◽  
Gyeong-Hoi Koo
Keyword(s):  
Optimal Design ◽  
Optimum Design ◽  
Seismic Performance ◽  
Response Analysis ◽  
Similar Degree ◽  
Seismic Load ◽  
Piping System ◽  
Tuned Mass Dampers ◽  
Seismic Safety ◽  
Design Values

In a nuclear power plant, it is essential to improve the seismic safety of the piping system for the coolant transfer to cool the high temperature caused by the nuclear reaction. Under this background, this study makes two major contributions. The first is that though tuned mass dampers (TMDs) were originally used only to reduce the vibration of piping itself, through this research, it was first proved that it had a positive effect on the improvement of the seismic performance of nuclear piping systems. Additionally, this study proposed a design approach that effectively obtains the optimal design values of TMDs associated with seismic performance. In order to effectively derive the TMD optimum design values, we not only utilized the existing TMD optimum design formula, but also additionally proposed a frequency response analysis-based TMD optimal design method. As a result, it was seen that primary responses of system were significantly reduced under the input seismic load due to the use of TMDs for the piping system. It was also confirmed that the use of the existing TMD formula brought about a similar degree of response reduction effect, while it was possible to get the improved effect when using the proposed method.

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