Adaptive Tuned Mass Damper for the Construction of Concrete Piers

Casado, Carlos M.; Poncela, Alfonso; Lorenzana, A.

doi:10.2749/101686607781645806

Cited by 15 publications

(18 citation statements)

References 5 publications

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“…From the above equation one can see that, if the impact does not happen, p = 0 in Equation (8). In this case the PTMD is performing as a traditional TMD.…”

Section: Modeling Of Structure Installed With Ptmdmentioning

confidence: 99%

“…However, studies have pointed out that passive devices are hard to adjust once they are installed and their robustness is questionable when the host structure is subjected to different excitations. Since TMD can only reduce vibration components whose frequencies are close to the tuned frequencies, it is believed that the most significant limitation of the TMD is its narrow effective bandwidth and the high sensitivity to even a small change in the tuning [7][8][9][10]. Thus, it is considered to be unsuitable for vibration control under broadband earthquake inputs [11].…”

Section: Introductionmentioning

confidence: 99%

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PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations

2017

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A pounding tuned mass damper (PTMD) is introduced by making use of the energy dissipated during impact. In the proposed PTMD, a viscoelastic layer is attached to an impact limitation collar so that energy can be further consumed and transferred to heat energy. An improved numerical model to simulate pounding force is proposed and verified through experimentation. The accuracy of the proposed model was validated against a traditional Hertz-based pounding model. A comparison showed that the improved model tends to have a better prediction of the peak pounding force. A simulation was then carried out by taking the benchmark Canton Tower, which is a super-tall structure, as the host structure. The dynamic responses of uncontrolled, TMD-controlled and PTMD controlled system were simulated under wind and earthquake excitations. Unlike traditional TMDs, which are sensitive to input excitations and the mass ratio, the proposed PTMD maintains a stable level of control efficiency when the structure is excited by different earthquake records and different intensities. Particularly, more improvement can be observed when an extreme earthquake is considered. The proposed PTMD was able to achieve similar, or even better, control effectiveness with a lower mass ratio. These results demonstrate the superior adaptability of the PTMD and its applicability for protection of a building against seismic activity. A parametric study was then performed to investigate the influence of the mass ratio and the gap value on the control efficiency. A comparison of results show that better control results will be guaranteed by optimization of the gap value.

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“…From the above equation one can see that, if the impact does not happen, p = 0 in Equation (8). In this case the PTMD is performing as a traditional TMD.…”

Section: Modeling Of Structure Installed With Ptmdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations

2017

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“…One of the most common SAPTMD mechanisms is based on the change of the pendulum’s length (Eason et al, 2015; Kheirkhah et al, 2013; Nagarajaiah and Pasala, 2010; Pinsky and Zevin, 1999; Roffel et al, 2011; Shu et al, 2017; Wang, Shi and Zhou, 2019a). SAPTMDs with variable mass have also been introduced (Casado et al 2007). Xiang and Nishitani (2017) proposed a self-centering nontraditional pendulum type TMD similar to an inverted rocking system in which its top part is connected to the main structure using connectors that provide rotational stiffness, and its bottom is connected to the ground using energy dissipating dampers.…”

Section: Introductionmentioning

confidence: 99%

An innovative semi-active pendulum tuned mass damper and its application in vibration control

Sadatieh

Ghorbani‐Tanha

2022

Journal of Vibration and Control

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An innovative Semi-Active Pendulum Tuned Mass Damper (SAPTMD) with variable frequency is introduced in this paper. The SAPTMD consists of two identical pendulum systems, each consisting of a pendulum and two springs attached to the pendulum mass. The pendulums are mounted on two boxes that can rotate symmetrically around the horizontal shafts that pass through them. Due to the change in inclination of the pendulum systems and, consequently, the orientation of the oscillating pendulums, the frequency of the proposed system can change within a predefined range. Besides, the need for less height for installation is another advantage of the SAPTMD over the conventional pendulum tuned mass dampers. In order to show the efficiency of the SAPTMD, it is attached to a single degree of freedom primary system excited similar to excitation due to an unbalanced rotating machinery during its start-up period. The SAPTMD’s performance is compared with a classical tuned mass damper. As it is shown, the response of the primary system is reduced noticeably. Furthermore, the performance of the system is improved by utilizing a fuzzy Proportional-Integral-Derivative (PID) controller.

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“…Chang et al proposed a new field‐based design procedure and an adjustable vertically moving TMD, which composed of variable mass blocks and changeable springs. Casado et al studied a control system for an adaptive tuned mass damper for self‐climbing formworks, which can be used in some critical construction phases of concrete piers. Berardengo et al proposed an adaptive TMD based on shape memory alloys and eddy currents.…”

Section: Introductionmentioning

confidence: 99%

Study on self-adjustable tuned mass damper with variable mass

Shi

Wang

Lü

2017

Struct Control Health Monit

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Summary Tuned mass dampers (TMDs) represent a quite mature technology for controlling human‐induced vibrations of footbridges, when they are tuned to the primary structure's fundamental frequency. However, the TMD is very sensitive to even a small change in the tuning ratio. This paper proposes a novel TMD named self‐adjustable variable mass TMD (SAVM‐TMD), which is capable of varying its mass and retuning its frequency on the basis of the acceleration ratio between the primary system and the TMD. The accelerations are obtained from two acceleration sensors, and the frequency adjustment is achieved by using a microcontroller and actuating devices. The acceleration ratio limit value should be set in the microcontroller firstly, and when the adjustment begins, the microcontroller will retune the TMD to a reasonable frequency region, under a specific harmonic excitation. The SAVM‐TMD can be regarded as a passive control device capable of adjusting its frequency. The performance of SAVM‐TMD is studied via both experimental studies and numerical simulations under different pedestrian excitations. It is found that the SAVM‐TMD is effective in reducing the response and improving the equivalent damping ratio of the primary system when the structural frequency changes, with little power consumption. The results obtained from the experimental studies and the numerical simulations agree with each other very well. More pedestrian vibration situations are studied in the numerical simulations, and the results also show that the SAVM‐TMD has excellent performance in controlling human‐induced vibrations.

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Adaptive Tuned Mass Damper for the Construction of Concrete Piers

Cited by 15 publications

References 5 publications

PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations

PTMD Control on a Benchmark TV Tower under Earthquake and Wind Load Excitations

An innovative semi-active pendulum tuned mass damper and its application in vibration control

Study on self-adjustable tuned mass damper with variable mass

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