Real-time performance monitoring of tuned mass damper system for a 183m reinforced concrete chimney

Brownjohn, James; Carden, E. Peter; Goddard, Charles R.; Oudin, G.

doi:10.1016/j.jweia.2009.10.013

Cited by 67 publications

(36 citation statements)

References 12 publications

(15 reference statements)

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“…Not many examples of "twin chimneys" can be found in literature, nevertheless a quite similar study confirmed the mitigation of the wind-induced vibrations reached by installing a TMD device similar to those installed at Rovinari Power Station, [11]. Figure 2 shows the TMD after its installation one chimney.…”

Section: Introductionmentioning

confidence: 55%

Full scale monitoring of the twin chimneys of the rovinari power plant

Bayati

Belloli

Rosa

et al. 2015

MATEC Web of Conferences

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Abstract. The presented paper deals with the structural identification and monitoring of two twin chimneys in very close arrangement. Due to twin arrangement, important interference effects are expected to modify the chimney response to wind action, causing vortex shedding and state-dependent excitation associated to the oscillatory motion of the leeward chimney, in and out of the windward chimney wake. The complexity of the physics of this problem is increased by the dependency of the aerodynamics of circular cylinders on Reynolds number; however, there is a weakness of literature about cylinders behaviour at critical and super-critical range of Reynolds number, due to experimental limitations. Also the International Committee on Industrial Chimneys (CICIND) does not provide, at present, any specific technical guideline about twin chimneys whose interaxis distance is less or equal two times the diameter, as in this case. For this reason a Tuned Mass Damper (TMD) has been installed in order to increase the damping of the chimney, as merely suggested. This work aims at assessing the effectiveness of the installed TMD and characterizing the tower dynamic behaviour itself due to the wind excitation, as well as providing full scale measurements for twin cylinders configuration at high Reynolds numbers.

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Section: Introductionmentioning

confidence: 55%

Full scale monitoring of the twin chimneys of the rovinari power plant

Bayati

Belloli

Rosa

et al. 2015

MATEC Web of Conferences

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“…Moreover the monitoring system allowed observing changes on the modes due to structural effects from TMD, in addition to expected changes due to temperature-dependent changes in concrete modulus. Other influences on the modes are the wind and its directional effects due to the construction of the new chimney close to the old one [10]. Environmental effects are always present on outdoor civil structures.…”

Section: Monitoring System Design and Adquisition Signal Processingmentioning

confidence: 99%

Model Updating for a 183m of Reinforced Concrete Chimney

García-Diéguez

Koo

Middleton

et al. 2011

Dynamics of Civil Structures, Volume 4

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This paper deals with model updating of Rugeley Chimney, a 183m reinforced concrete flue gas stack at a coalfired power station. Since February 2007 this has been monitored due to safety concerns about vibration levels. A 42-tonne tuned mass damper (TMD) was installed to reduce response levels and the monitoring system was used to track the mode frequencies.A numerical model has been built and experimental observations have been used to identify the concrete properties and the foundation stiffness of the original chimney through a process of model updating. These updated parameters are used to compare with the actual situation of the chimney and to detect possible changes on the chimney characteristics (stiffness and density) in the present time, comparing with another numerical model with TMD mass and stiffness on the top of the chimney. The updating procedure uses a sensitivity matrix and comparison of the frequencies and mode shapes through MAC values.

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“…Noting the exorbitant rise in the project cost, it is of interest to analyze reduction in the response and the consequent shear force by using some alternative approaches. Recently, Brownjohn et al [9] had shown the effectiveness of tuned mass damper (TMD) to control the responses of an old chimney. They installed a TMD on a 183 m high old chimney to improve the damping of the chimney.…”

Section: Introductionmentioning

confidence: 99%