Control of Full-Size Frame Structures via Optimum Tuned Mass Dampers

2021 ◽  
Vol 10 (1) ◽  
pp. 47-61
Author(s):  
Apaer Mubuli ◽  
Sinan Melih Nigdeli ◽  
Gebrail Bekdaş
Keyword(s):  
Control Systems ◽  
Structural Control ◽  
Passive Control ◽  
Structural Model ◽  
Frame Structures ◽  
Tuned Mass Dampers ◽  
Element Analysis ◽  
Quarter Century ◽  
Full Size ◽  
Stiffness Properties

Structural control techniques are widely used to reduce the maximum values of the vibrations caused by strong earthquakes and winds and to rapidly dampen them. Among them, passive control systems have been used effectively to protect structural and non-structural elements from the destructive effects of earthquakes in the past quarter-century. Tuned mass dampers (TMD) that are part of passive control systems have been widely used in civil structures with their alternative benefits. In this study, the optimal adjustment of the parameters of a passive TMD placed on the top floor of the 10-story symmetrical structure was performed by a metaheuristic method called Jaya algorithm. The structural model was modeled in the SAP2000 finite element analysis software to obtain mass and stiffness properties. The results of the numerical analysis showed that the optimization of the TMD parameters is highly effective in reducing the total shear forces of the base of the full-size frame structures and reducing displacement in the event of seismic loads.

scholarly journals Application of Tuned Mass Dampers for Structural Vibration Control: A State-of-the-art Review

2020 ◽  
Vol 6 (8) ◽  
pp. 1622-1651
Author(s):  
Fatemeh Rahimi ◽  
Reza Aghayari ◽  
Bijan Samali
Keyword(s):  
Vibration Control ◽  
Control Systems ◽  
Performance Optimization ◽  
Structural Control ◽  
Vibration Isolation ◽  
Hybrid Control ◽  
Structural Vibration ◽  
Tuned Mass Dampers ◽  
Advantages And Disadvantages ◽  
Hybrid Control Systems

Given the burgeoning demand for construction of structures and high-rise buildings, controlling the structural vibrations under earthquake and other external dynamic forces seems more important than ever. Vibration control devices can be classified into passive, active and hybrid control systems. The technologies commonly adopted to control vibration, reduce damage, and generally improve the structural performance, include, but not limited to, damping, vibration isolation, control of excitation forces, vibration absorber. Tuned Mass Dampers (TMDs) have become a popular tool for protecting structures from unpredictable vibrations because of their relatively simple principles, their relatively easy performance optimization as shown in numerous recent successful applications. This paper presents a critical review of active, passive, semi-active and hybrid control systems of TMD used for preserving structures against forces induced by earthquake or wind, and provides a comparison of their efficiency, and comparative advantages and disadvantages. Despite the importance and recent advancement in this field, previous review studies have only focused on either passive or active TMDs. Hence this review covers the theoretical background of all types of TMDs and discusses the structural, analytical, practical differences and the economic aspects of their application in structural control. Moreover, this study identifies and highlights a range of knowledge gaps in the existing studies within this area of research. Among these research gaps, we identified that the current practices in determining the principle natural frequency of TMDs needs improvement. Furthermore, there is an increasing need for more complex methods of analysis for both TMD and structures that consider their nonlinear behavior as this can significantly improve the prediction of structural response and in turn, the optimization of TMDs.

Experimental Assessment of Structural Control Devices Used to Protect Civil Buildings

2008 ◽  
Vol 56 ◽  
pp. 271-276
Author(s):  
Georges Magonette
Keyword(s):  
Control Systems ◽  
Structural Control ◽  
Passive Control ◽  
Testing Procedure ◽  
Wind Loading ◽  
Research Centre ◽  
Practical Implementation ◽  
Semiactive Control ◽  
Joint Research ◽  
On Line

This paper presents the latest developments realized at the European Laboratory for Structural Assessment (ELSA) of the Joint Research Centre (JRC) to extend the 'on-line testing method with substructuring' to the experimental verification of civil buildings protected by semiactive devices. Recent works have indicated that semiactive control systems can achieve significantly better results than passive control systems and demonstrate significant potential for controlling structural responses to a wide variety of dynamic loading conditions. These factors explain the considerable interest in the practical implementation of these systems for protection of civil infrastructures against earthquake and wind loading or, more generally, for vibration mitigation. Commonly, cyclic tests are initially performed to characterize the semiactive device behavior but a complete validation requires the simulation of realistic dynamic loads including the effects of the protected structure and the evaluation in real world of the performance and robustness of different control laws and related instrumentation before the final hardware implementation. Experimental verifications satisfying such requirements can be achieved by using the novel extension of the on-line testing procedure presented here.

scholarly journals Seismic Response of High-Rise Buildings Equipped with Base Isolation and Non-Traditional Tuned Mass Dampers

2019 ◽  
Vol 9 (6) ◽  
pp. 1201 ◽  
Author(s):  
Hosein Naderpour ◽  
Naghmeh Naji ◽  
Daniel Burkacki ◽  
Robert Jankowski
Keyword(s):  
Control Systems ◽  
Structural Control ◽  
Linear Models ◽  
Base Isolation ◽  
Near Field ◽  
Structural Vibrations ◽  
Tuned Mass Dampers ◽  
Isolation System ◽  
High Rise ◽  
Earthquake Records

One of the methods in structural control is the application of combinational control systems in order to reduce the response of structures during earthquakes. The aim of the present paper is to verify the effectiveness of a hybrid control strategy, combining base isolation and non-traditional tuned mass dampers (TMDs) (i.e., TMDs with dashpots directly connected to the ground) in suppressing structural vibrations of high-rise buildings. The study was conducted for structures with a different number of stories exposed to various far-field and near-field earthquake records. Multi degree-of-freedom models of buildings as well as non-linear models of the base isolation system were employed in the analysis. The results of the study clearly confirmed that the response of high-rise buildings during earthquakes could be significantly reduced using base isolation devices and non-traditional TMDs. They showed also that the effectiveness in suppressing structural vibrations substantially depends on the type of the control system used. The influence of the base isolation in the reduction of structural response under different earthquake records was much larger than the influence of non-traditional TMDs. In the case of buildings analyzed in the study, the application of TMDs alone resulted in a reduction not larger than 20%, as compared to the response without any system. On the other hand, the response of buildings equipped with only base isolation devices was reduced by more than 70% under different ground motions. However, the largest reductions (larger than 80%) were obtained for the cases when both control systems (base isolation and non-traditional TMDs) were used simultaneously.

Use of the Finite Element Analysis Method in Pedodontics

2018 ◽  
Vol 55 (4) ◽  
pp. 666-675
Author(s):  
Mihaela Tanase ◽  
Dan Florin Nitoi ◽  
Marina Melescanu Imre ◽  
Dorin Ionescu ◽  
Laura Raducu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Model ◽  
Analysis Method ◽  
Ansys Software ◽  
Concentrated Force ◽  
Element Analysis ◽  
Finite Element Analysis Method ◽  
The Finite Element Analysis ◽  
Solid Type

The purpose of this study was to determinate , using the Finite Element Analysis Method, the mechanical stress in a solid body , temporary molar restored with the self-curing GC material. The originality of our study consisted in using an accurate structural model and applying a concentrated force and a uniformly distributed pressure. Molar structure was meshed in a Solid Type 45 and the output data were obtained using the ANSYS software. The practical predictions can be made about the behavior of different restorations materials.

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