Tuned Mass Dampers for Passive Control of Structures Under Earthquake Excitations

2015 ◽  
pp. 3814-3823 ◽  
Author(s):  
Rafael H. Lopez ◽  
Leandro F. F. Miguel ◽  
André T. Beck
Keyword(s):  
Passive Control ◽  
Tuned Mass Dampers

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.

Analytical analysis for the design of nonlinear tuned mass damper

2020 ◽  
Vol 26 (9-10) ◽  
pp. 646-658
Author(s):  
Lu-yu Li ◽  
Tianjiao Zhang
Keyword(s):  
Passive Control ◽  
Design Method ◽  
Tuned Mass Damper ◽  
Control Device ◽  
Control Performance ◽  
Tuned Mass Dampers ◽  
Mass Damper ◽  
Practical Engineering ◽  
Optimum Formula ◽  
Nonlinear Tuned Mass Damper

A tuned mass damper is a passive control device that has been widely used in aerospace, mechanical, and civil engineering as well as many other fields. Tuned mass dampers have been studied and improved over the course of many years. In practical engineering applications, a tuned mass damper inevitably produces some nonlinear characteristics due to the large displacement and the use of the limiting devices, but this nonlinearity is often neglected. The simulation results in this study confirm that neglecting the nonlinearity in the design process can produce adverse effects on the control performance. This paper takes into account the nonlinearity of the tuned mass damper produced in the process of vibration and deduces an optimum formula for the frequency of a tuned mass damper by the complexification averaging method and multiscale method. Based on this formula, a modified design method for the frequency of a tuned mass damper is presented. The numerical results show that the nonlinear tuned mass damper after modification is better than a linear tuned mass damper in terms of control performance.

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 Optimum Tuning of Passive Tuned Mass Dampers for the Mitigation of Pulse-Like Responses

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Jonathan Salvi ◽  
Egidio Rizzi ◽  
Emiliano Rustighi ◽  
Neil S. Ferguson
Keyword(s):  
Seismic Isolation ◽  
Passive Control ◽  
Structural Response ◽  
Optimization Procedure ◽  
Control Device ◽  
Average Response ◽  
Tuned Mass Dampers ◽  
Unit Impulse ◽  
Base Displacement ◽  
The Time Domain

Tuned mass dampers (TMDs) are typically introduced and calibrated as natural passive control devices for the vibration mitigation of the steady-state response of primary structures subjected to persistent excitations. Otherwise, this work investigates the optimum tuning of TMDs toward minimizing the transient structural response. Specifically, a single-degree-of-freedom (SDOF) system is considered as a primary structure, with added TMD, subjected to pulse-like excitations. First, the system is analytically analyzed, within the time domain, for unit impulse base displacement, through Laplace transform. Then, the tuning process is numerically explored by an optimization procedure focused on an average response index, to extract the optimum condition toward best TMD calibration. The efficiency of the proposed control device is then assessed and demonstrated through further post-tuning numerical tests, by considering as dynamic loadings: first, a time unit impulse base displacement, coherent with the source description above; second, different pulse-like excitations, to detect the effectiveness of the so-conceived TMD for generic ideal shock actions; third, a set of nonstationary earthquake excitations, to enquire the achievable level of seismic isolation. It is shown that this leads to a consistent passive TMD in such a transient excitation context, apt to mitigate the average response. Additionally, the present tuning forms a necessary optimum background for a possible upgrade to a hybrid TMD, with the potential addition of an active controller to the so-optimized TMD, to achieve even further control performance, once turned on, specifically for abating the peak response, too.

Tuned Mass Dampers for Passive Control of Structures Under Earthquake Excitations

2014 ◽  
pp. 1-12
Author(s):  
Rafael H. Lopez ◽  
Leandro F. F. Miguel ◽  
André T. Beck
Keyword(s):  
Passive Control ◽  
Tuned Mass Dampers

scholarly journals Dynamic response of tension leg platform with tuned mass dampers

2013 ◽  
Vol 10 (2) ◽  
pp. 149-156 ◽  
Author(s):  
Srinivasan Chandrasekaran ◽  
Deepak Kumar ◽  
Ranjani Ramanathan
Keyword(s):  
Large Amplitude ◽  
Passive Control ◽  
Control Device ◽  
Tension Leg Platform ◽  
Tuned Mass Dampers ◽  
Response Control ◽  
Wide Range ◽  
Mass Damper ◽  
H2 Optimization ◽  
Large Amplitude Motion

Tension Leg Platform (TLP) is a taut-moored compliant offshore platform that deploys tethers under high initial pretension to counteract the excess buoyancy. TLPs show large amplitude responses under the encountered lateral forces, which challenges the serviceability of the platform in critical sea states. One of the passive control device i.e. Tuned Mass Damper (TMD) is attempted in the present study to control large amplitude motion of TLPs. In the present study, response control of TLP using single and multiple TMDs is compared. Optimized parameters of multiple tuned mass dampers (MTMD) are obtained using H2 optimization algorithm for the maximum control of the motion of the platform. Based on the studies conducted, it is seen that MTMD systems show better response control in comparison to the single TMD. Higher robustness of the MTMD system is also examined to highlight the use of MTMD over a wide range of excitation frequencies in extreme sea states.DOI: http://dx.doi.org/10.3329/jname.v10i2.16184

scholarly journals Optimal Location of Multiple Tuned Mass Dampers in Regular and Irregular Tall Steel Buildings Plan

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Mohsen Khazaei ◽  
Reza Vahdani ◽  
Ali Kheyroddin
Keyword(s):  
Passive Control ◽  
Time History ◽  
Optimal Location ◽  
Nonlinear Time History Analysis ◽  
Steel Buildings ◽  
Base Shear ◽  
Tuned Mass Dampers ◽  
History Analysis ◽  
Nonlinear Time History ◽  
Multiple Tuned Mass Dampers

Tuned mass dampers are one of the most common devices for the passive control of structures subjected to earthquakes. The structure of these dampers consists of three main parameters: mass, damping, and stiffness. Tuned mass dampers reduce the amplitude of the responses affecting on a mode. In most cases, only a single TMD (tuned mass damper) or a few dampers at several points above the building height are installed on the roof of the building, requiring considerable mass and space in some parts of the structure as overhead. It is also more important to predict the elements that will meet the required mass. In this research, the performance of multiple tuned mass dampers (MTMDs) is investigated in L- and U-shaped regular and irregular tall steel buildings with 10 and 20 floors, under the near- and far-field records. Nonlinear time history analysis is also applied to evaluate the multiple tuned mass dampers effects on the seismic responses of the structures. The SAP2000 API and MATLAB genetic algorithm are used to determine the optimal location of the MTMDs in the roof plans of the buildings. The results show the effects of multiple tuned mass dampers in reducing the seismic response of acceleration, displacement, and base shear up to 50, 40, and 40% in average, respectively. The results of determining the optimum location of MTMDs in the models indicate the importance of the symmetry of the dampers relative to the centre of mass of the building.

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