Optimal design theories of tuned mass dampers with nonlinear viscous damping

Chung, Lap-Loi; Wu, Lai‐Yun; Huang, Hsu-Hui; Chang, Chung-Hsin; Lien, Keng‐Wen

doi:10.1007/s11803-009-9115-3

Cited by 39 publications

(34 citation statements)

References 21 publications

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“…The previous section has shown that the displacement reduction of the main structure is not very sensitive to the damping coefficient of the nonlinear viscous damper employed in the TVMD, which is in agreement with the results in Chung et al for nonlinear TMD under wind excitations. In this section, the sensitivity of the maximum DMF of the main structure to the intensity of the external excitations is analyzed.…”

Section: Optimal Design Of Tvmd With Nonlinear Fluid Viscous Dampingsupporting

confidence: 90%

“…The GVB system has the same mathematical model as the TVMD, and their results showed that the GVB system with nonlinear viscous damper has less requirement of the damping coefficient but can obtain nearly the same control performance as the GVB system with linear viscous damper. On the other hand, the performances of the TMD with nonlinear viscous damper attached to SDOF system or multiple degree‐of‐freedom system under white noise excitations or wind loads have been carefully studied . The results indicate that the damping exponent of the nonlinear viscous damper has a great influence on the optimal damping coefficient.…”

Section: Introductionmentioning

confidence: 99%

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Optimal design of TVMD with linear and nonlinear viscous damping for SDOF systems subjected to harmonic excitation

Huang

Hua

Chen

et al. 2019

Struct Control Health Monit

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Summary This paper investigates the optimal design of the tuned viscous mass damper (TVMD) with linear and nonlinear viscous damping properties for a single degree‐of‐freedom structure subjected to harmonic excitation. The TVMD consists of a parallel‐connected inerter and viscous damper, and a spring that mounts them to the structure. To examine the vibration control performance of the TVMD, both theoretical analysis and numerical optimization are conducted to obtain the optimal parameters of the TVMD with either linear or nonlinear viscous damping. The influence of the damping exponent of the nonlinear viscous damper on the optimal parameters and performance of the TVMD is analyzed. The results show that much better control effectiveness and robustness can be achieved by the TVMD when compared with tuned mass damper (TMD). Furthermore, it is also of great practical importance to show that the static deformation of the supporting spring due to the self‐weight of the inerter is only a small fraction of the traditional TMD in case of vertical vibration control. Compared with the linear TVMD, the nonlinear TVMD can achieve comparable or even slightly better control performance. The optimal damping coefficient depends largely on the damping exponent, and the loading intensity fluctuation also has an influence on the performance of the nonlinear TVMD. Moreover, it is shown that that the nonlinear TVMD with damping exponent ν = 2 has the best control performance on the peak displacement response of the main structure, and the TVMD with linear viscous damping optimized for the harmonic excitation can also effectively suppress the wind‐induced vibration.

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Section: Optimal Design Of Tvmd With Nonlinear Fluid Viscous Dampingsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Optimal design of TVMD with linear and nonlinear viscous damping for SDOF systems subjected to harmonic excitation

Huang

Hua

Chen

et al. 2019

Struct Control Health Monit

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“…However, they suffer the drawback of not being functional at low‐frequency wind excitations. Hence, for mitigation of wind‐induced vibrations in a full‐scale structure, linear and nonlinear VDs have been implemented either in large numbers (as elucidated in Sections and ) or in combination with passive or active TMD/TLCDs …”

Section: Introductionmentioning

confidence: 99%

Frequency‐independent hysteretic dampers for mitigating wind‐induced vibrations of tall buildings

Ali

Alexander

Ray

2019

Struct Control Health Monit

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Summary Mitigation of wind‐induced vibrations in tall buildings has been taken seriously for decades for the safety of the load bearing members, nonstructural elements, and the building envelope, as well as for the comfort of the occupants. Among various technologies to mitigate these vibrations, tuned mass dampers with various improvisations, active or semiactive controls, and viscous dampers are proposed and used extensively. Although these technologies are dependent on the frequency of vibration, research on frequency‐independent hysteretic dampers for mitigating wind‐induced vibrations are quite limited. This paper evaluates the efficiency of hysteretic dampers in suppressing wind‐induced vibrations. Inelastic dynamic wind‐load analyses are performed with two regular three‐dimensional buildings and one 76‐story benchmark two‐dimensional building. It is found that hysteretic dampers perform exceedingly better than the state‐of‐the‐art control systems because they can absorb energy near the natural frequencies of the parent structure, as well as within the frequency bandwidth of windstorms.

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“…For example, a nonlinear hysteretic damper has been supplemented for enhanced energy dissipation [13][14][15][16][17]. Chung et al [18] demonstrated the effectiveness of such a TMD by implementation in the Taipei 101 building. These enhanced TMDs were found to be more effective than the conventional ones in a certain range of excitation frequencies.…”

Section: Introductionmentioning

confidence: 99%

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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Optimal design theories of tuned mass dampers with nonlinear viscous damping

Cited by 39 publications

References 21 publications

Optimal design of TVMD with linear and nonlinear viscous damping for SDOF systems subjected to harmonic excitation

Optimal design of TVMD with linear and nonlinear viscous damping for SDOF systems subjected to harmonic excitation

Frequency‐independent hysteretic dampers for mitigating wind‐induced vibrations of tall buildings

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

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