Optimal tuning of tuned liquid column damper systems in random vibration by means of an approximate formulation

Matteo, Alberto Di; Iacono, F.; Navarra, Giacomo; Pirrotta, Antonina

doi:10.1007/s11012-014-0051-6

Cited by 33 publications

(19 citation statements)

References 29 publications

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“…In this respect, in order to find a simplified straight relationship between the input PSD G 0 and the estimated value for ζ l , a closed-form solution in terms of steady-state response statistic σ 2 Y is proposed, as detailed in the following. This proposed procedure is based on the approach reported in [4,7], for TLCD-controlled systems, and here applied to deal with base-isolated TLCD hybrid-controlled SDOF structures, as those shown in Fig. 1c.…”

Section: Statistical Linearization Of Base-isolated Structure Equippementioning

confidence: 99%

“…(23) to find the optimal head loss coefficient ξ opt , once the input PSD G 0 is known. At this stage, it is worth noting that the above-described procedure can be still applied even for generic earthquake excitation, defined in the specific seismic code in terms of spectral acceleration response spectrum, as it will be shown in the following and further detailed in [7].…”

Section: Investigation On the Optimal Design Parametersmentioning

confidence: 99%

“…of the complete linear equations of motion (7). Note that, in this way, for each iteration of the PSO optimization algorithm the iterative SLT must be applied to evaluate the equivalent linear damping ratio ζ l , as previously discussed.…”

Section: Bmentioning

confidence: 99%

“…However, unlike the traditional TMD, the TLCD response is nonlinear [5,9] and the optimal damping parameters cannot be established a priori unless the forcing magnitude is known and numerical optimization methods are required (see [7] and references therein).…”

Section: Introductionmentioning

confidence: 99%

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Optimal design of tuned liquid column dampers for seismic response control of base-isolated structures

et al. 2017

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In this paper, the use of a tuned liquid column damper (TLCD) as a cost-effective means to control the seismic response of a base-isolated structure is studied. A straightforward direct approach for the optimal design of such a device is proposed, considering a white noise model of the base excitation. On this base, a direct optimization procedure of the TLCD design parameters is performed and optimal design charts are presented as a ready-to-use practical design tool. Comparison with the optimal parameters obtained considering a classical iterative statistical linearization technique proves the reliability of the proposed approach. The performance of the base-isolated TLCD-controlled structure is examined and compared with that of the simple base-isolated one (without TLCD), using a set of 44 recorded ground motions as base excitation. Theoretical and numerical results show that the TLCD is rather effective in reducing the response of base-isolated structures under strong earthquakes. Therefore, considering its advantageous characteristics and its overall beneficial effects, TLCDs can be considered as practical and appealing means to control the seismic response of base-isolated structures.

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Section: Statistical Linearization Of Base-isolated Structure Equippementioning

confidence: 99%

Section: Investigation On the Optimal Design Parametersmentioning

confidence: 99%

Section: Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal design of tuned liquid column dampers for seismic response control of base-isolated structures

et al. 2017

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“…Reference [15] deals with tuned liquid column dampers (TLCDs), used as passive devices. An approximated simplified formulation, based on a statistical linearization technique previously developed by the same authors, is here employed for computing optimal TLCD parameters.…”

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confidence: 99%

Preface

Luongo

2015

Meccanica

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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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Optimal tuning of tuned liquid column damper systems in random vibration by means of an approximate formulation

Cited by 33 publications

References 29 publications

Optimal design of tuned liquid column dampers for seismic response control of base-isolated structures

Optimal design of tuned liquid column dampers for seismic response control of base-isolated structures

Preface

Study on self-adjustable tuned mass damper with variable mass

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