Enhanced hybrid active tuned mass dampers for structures

Cao, Liyuan; Li, Chunxiang

doi:10.1002/stc.2067

Cited by 23 publications

(16 citation statements)

References 26 publications

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“…Structural control technologies have been utilized worldwide as effective measures to enhance structural safety during extreme events. [ 1 ] Compared with active and semiactive control technologies, [ 2–6 ] passive control technologies are considered to be more reliable and affordable as they do not need any power supply, feedback algorithms, or supplemental devices. Their more readily comprehensible concept and relatively simple design procedure are among other advantages of passive control strategies.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of track nonlinear energy sinks subjected to simple and stochastice excitations

Wang

Wierschem

et al. 2020

Earthq Engng Struct Dyn

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Track nonlinear energy sinks (track NESs) have been shown to be an effective and applicable strategy to mitigate structural response in recent years. However, previous studies on track NESs has mainly focused on demonstrating the benefits of track NESs through numerical simulations and experiments, with relatively little attention paid to the analytical understanding of the unique dynamics of track NESs. This study analyzes the responses of a track NES when subjected to impulsive and harmonic excitations by the harmonic balance method. Special attention is given to the cause and effect of the peaking behavior that is a prominent characteristic of the track NES's restoring forcedisplacement relationship. Analytical results reveal that the special energy-frequency characteristics of track NESs can be, at times, utilized to enhance the energy robustness that is absent in the conventional cubic NESs. Based on the analytical response expression, an equivalent linearization method (ELM) for the track NESs is developed for stochastic analysis. This ELM is numerically validated on the systems with strong nonlinearities. Stochastic optimization built on the ELM is performed to obtain design parameters of the track NES that can lead to minimum response variances of the primary structure. In particular, the proposed optimization procedure can be applied to seismic optimum design in which the seismic excitations are modeled as filtered whitenoise ground motions. The analytical techniques provided in this study lay the groundwork for the practical implementation of track NESs as a robust and effective control strategy for engineering structures. K E Y W O R D Sharmonic balance method, harmonic excitation, impulsive excitation, peaking behavior, stochastic optimization, track nonlinear energy sink

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Section: Introductionmentioning

confidence: 99%

Dynamic analysis of track nonlinear energy sinks subjected to simple and stochastice excitations

Wang

Wierschem

et al. 2020

Earthq Engng Struct Dyn

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“…asymmetric nonlinear force, energy robustness, frequency robustness, nonlinear energy sink, passive control, seismic excitations 1 | INTRODUCTION Structural control technologies have been developed as effective measures to mitigate undesired responses of buildings, bridges, and infrastructures in the past decades. 1 Although active and semiactive control approaches have witnessed great progress and provided higher control capacity than their passive counterparts, [2][3][4] passive structural control technologies are still much more widely applied in engineering practice nowadays. The advantages of passive control strategies lie in their stability, reliability, and simplicity without any need for power supply and feedback system.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of a novel asymmetric nonlinear mass damper for seismic response mitigation

Wang

Liu

et al. 2020

Struct Control Health Monit

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Summary This paper proposes a novel passive mass damper, namely, asymmetric nonlinear energy sink (Asym NES), which is characterized by integrating linear and nonlinear restoring forces to mitigate the unwanted responses of building structures. The Asym NES, configured based on a cubic NES, consists of an auxiliary mass connected to the primary structure through a linear and nonlinear springs. These two springs are statically balanced at a deformed position, producing an asymmetric restoring force in the Asym NES. The study commences with a detailed working principle of the Asym NES, and the equations of motion of an Asym NES‐attached system are derived. Subsequently, experimental studies on the Asym NES designed for a small‐scale three‐story steel frame are conducted; the natural frequencies of which can be altered by changing the number of columns per story. Moreover, the performance of the Asym NES is compared with a tuned mass damper (TMD) and a cubic NES under impulsive excitations. Test results demonstrate the effectiveness of the Asym NES as well as its robustness against changes in the structural frequency. Following the experimental studies, the validated Asym NES model is further applied in the numerical investigation on a six‐story benchmark building to highlight its effectiveness and robustness in potential practical applications. Besides the impulsive excitations, an ensemble of 106 seismic ground motions with wide‐ranged energies is applied to the structures with original and decreased frequencies. Numerical results show that the proposed Asym NES is as effective as the in‐tune TMD in response mitigation under seismic excitations and exhibits strong robustness against changes in both the energy level and the structural frequency. The ingenious design and excellent efficiency of the Asym NES can offer a promising type of high‐performance device for structural control under extreme events.

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“…Tuned mass damper (TMD) and tuned liquid damper (TLD) are typical passive control devices . Many scholars have done a large number of theoretical research and application of TMD and TLD in structural vibration control.…”

Section: Introductionmentioning

confidence: 99%

“…[2,3] Tuned mass damper (TMD) and tuned liquid damper (TLD) are typical passive control devices. [4][5][6][7][8][9][10] Many scholars have done a large number of theoretical research and application of TMD and TLD in structural vibration control. Tsai [11] determined the optimal parameters of TMD by studying its influence on seismic excitation frequency.…”

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confidence: 99%

Experimental and numerical study on vibration control effects of a compound mass damper

Lü

Liao

Zhou

2018

Structural Design Tall Build

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Summary A compound mass damper (CMD) was put forwarded based on the joint vibration control effects of tuned liquid damper and colliding particles. A series of shaking table tests were designed in order to investigate the dynamic response of a single degree of freedom bent frame structure with or without the damper (CMD, tuned mass damper, and tuned liquid damper) under three different kinds of earthquake waves. It is shown that the vibration reduction performance of CMD is generally better than the traditional dampers no matter from peak response attenuation rate or root mean square response attenuation rate. The vibration reduction effect of traditional dampers is susceptible to the characteristics of earthquake waves, whereas CMD is effective in a broader frequency bands. Also, the vibration reduction effect of CMD is not sensitive to the amplitude of earthquake waves, which means the system has good robustness. In addition, CMD has the advantage of fast start‐up. The numerical simulation results of the CMD are obtained through certain simplifications, and are in good agreement with the experimental results, which further verifies the damping effect of the proposed damper and provides a simplified method for its engineering design.

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Enhanced hybrid active tuned mass dampers for structures

Cited by 23 publications

References 26 publications

Dynamic analysis of track nonlinear energy sinks subjected to simple and stochastice excitations

Dynamic analysis of track nonlinear energy sinks subjected to simple and stochastice excitations

Experimental and numerical studies of a novel asymmetric nonlinear mass damper for seismic response mitigation

Experimental and numerical study on vibration control effects of a compound mass damper

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