Full-scale damping measurements of structures in Australia

Glanville, M.J.; Kwok, K.C.S.; Denoon, Roy

doi:10.1016/0167-6105(96)00016-5

Cited by 28 publications

(18 citation statements)

References 5 publications

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“…Damping is not an exclusive physical phenomenon in structures dissimilar to mass and stiffness characteristics of a structural system. Therefore, modelling of damping in structures is not accurate like mass and stiffness and its determination is entirely possible based on full-scale measurements [19,23]. The damping ratios are usually measured from experience or adopted through suggested values by design guides and cannot be determined through analytical methods [25].…”

Section: Dampingmentioning

confidence: 99%

Dynamic response of low frequency Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) floor system under human walking load

Gandomkar

Badaruzzaman

Osman

2012

Lat. Am. j. solids struct.

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This paper investigates the dynamic response of a composite structural system known as Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) to evaluate its vibration serviceability under human walking load. For this point, thirteen (13) PSSDBC panels in the category of Low Frequency Floor (LFF) were developed using Finite Element Method (FEM). The natural frequencies and mode shapes of the studied panels were determined based on the developed finite element models. For more realistic evaluation on dynamic response of the panels, dynamic load models representing human walking load were considered based on their Fundamental Natural Frequency (FNF), and also time and space descriptions. The peak accelerations of the panels were determined and compared to the limiting value proposed by the standard code ISO 2631-2. Effects of changing thickness of the Profiled Steel Sheet (PSS), Dry Board (DB), screw spacing, grade of concrete, damping ratio, type of support, and floor span on the dynamic responses of the PSSDBC panels were assessed. Results demonstrated that although some factors reduced dynamic response of the PSSDBC system under human walking load, low frequency PSSDBC floor system could reach high vibration levels resulting in lack of comfortableness for users. Keywords structural composite floor system, profiled steel sheet dry board, vibration serviceability, human walking load, dynamic response, human comfort.

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Section: Dampingmentioning

confidence: 99%

Dynamic response of low frequency Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) floor system under human walking load

Gandomkar

Badaruzzaman

Osman

2012

Lat. Am. j. solids struct.

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“…Schematic of the process used to excite a building using a loaded tower crane (Glanville et al, 1996). Typical trace of acceleration response of a crane-excited building (Glanville et al, 1996).…”

Section: Fig Urementioning

confidence: 99%

“…building in Sydney (Glanville et al, 1996). A typical trace of the resultant acceleration response of the crane-excited building is shown in fi gure 4, from which the natural frequency of vibration and damping value can be determined to an accuracy of about 10% and 20%, respectively.…”

Section: Fig Urementioning

confidence: 99%

Behaviour of tall buildings and structures in strong winds: Dynamic properties, response characteristics and vibration mitigation

Kwok¹

2013

AJSE

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This paper presents techniques and instrumentation employed in the measurement of dynamic structural properties of tall buildings and structures, long-term monitoring of their responses in strong winds, and vibration mitigation systems installed in actual buildings and structures. The merits and limitations of these techniques are discussed. Natural frequencies of vibration, defl ected mode shapes and damping values can be determined reliably through dynamic measurements on actual buildings, and these results provide invaluable validations of numerical modelling techniques and generalised prediction formulae. The improved accuracy of prediction processes, coupled with a better understanding of building performance in strong winds, through long-term building monitoring, can lead to signifi cant cost savings in the wind-resistant design and construction of tall buildings.

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“…In contrast, forced vibration tests use a vibration generator to create the resonant phenomenon. To do this, the 'sweep frequency' procedure is required where the applied vibration frequency is manually or computer controlled to detect the resonant frequency [87][88][89].…”

Section: Practical Methodsmentioning

confidence: 99%

“…It was highlighted that the natural frequency of the first mode was always around or below 1 Hz and the mode shapes were highly dependent on frequencies and damping values. Subsequently, these authors [88] conducted further detailed measurement on damping ratios of a free-standing lattice tower by the use of the forced vibration method. The results showed that the damping known as total damping t ζ as the sum of structural damping and aerodynamic damping, and with the increase of vibration amplitudes, damping ratios increased while natural frequencies decreased [95].…”

Section: Previous Research On Dynamic Properties Of Ltts and Line Sysmentioning

confidence: 99%

Structural Analysis of Lattice Steel Transmission Towers: A Review

Chen¹,

Ou²

2016

J Steel Struct Constr

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Lattice Transmission Towers (LTT) and the associated transmission line systems are important infrastructure in modern society. Due to the complicated load conditions and the nonlinear interaction among the large number of structural components, accurate structural analysis of the LTT systems has been a challenging topic for many years. Still today there are some gaps between research and industrial practice. This paper presents a summary of research outcomes from current literature. Recent developments in structural modelling and failure prediction technology are reviewed in terms of connection joints, individual members and structural systems subjected to static and dynamic loads. The advantages and disadvantages of different approaches have been compared. Finally, the knowledge gaps, associated challenges and possible research directions are highlighted.

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Full-scale damping measurements of structures in Australia

Cited by 28 publications

References 5 publications

Dynamic response of low frequency Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) floor system under human walking load

Dynamic response of low frequency Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) floor system under human walking load

Behaviour of tall buildings and structures in strong winds: Dynamic properties, response characteristics and vibration mitigation

Structural Analysis of Lattice Steel Transmission Towers: A Review

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