Ever increasing slenderness in modern long-span concrete floors, made possible through techniques... more Ever increasing slenderness in modern long-span concrete floors, made possible through techniques such as the use of prestressing, high-strength concrete and more efficient structural sections, is resulting in more frequent problems with their vibration serviceability. However, there is a lack of knowledge of how to model such structures appropriately and current simplified guidelines for assessment of vibration serviceability at the
... Modelling Approaches Aleksandar Pavic ... Corresponding author: Dr Aleksandar Pavic Departmen... more ... Modelling Approaches Aleksandar Pavic ... Corresponding author: Dr Aleksandar Pavic Department of Civil & Structural Engineering University of Sheffield Sir Frederick Mappin Building Sheffield S1 3JD E-mail: A.Pavic@Sheffield.ac.uk Tel: 0114-2225721 Fax: 0114-2225700 ...
... 2] on a range of parametrically varied foot-bridge structures ... Table 2. It should be notic... more ... 2] on a range of parametrically varied foot-bridge structures ... Table 2. It should be noticed that the fundamental frequency (3.4 Hz) of the cable-stayed footbridge is margin ... For the purpose of assessing vibration serviceability, the guidelines of the UK code (BSI 1978) were taken as ...
This paper describes an investigation of the dynamic behaviour of the City of Manchester Stadium ... more This paper describes an investigation of the dynamic behaviour of the City of Manchester Stadium in Manchester in the UK. A programme of pre-test numerical modelling, ambient and shaker modal testing and post-test FE modelling is described, with a view to providing insight into how future models of similar structures may be constructed in the future to better represent the actual dynamic behaviour. The modal testing of the structure showed a number of global and seating deck modes that are possible to be excited by dynamic crowd excitation. Some understanding of these modes was possible using simplified pre-test models, but to more accurately represent the behaviour of the stand, it was necessary to develop a full 3D FE model of the whole stand. This provides accurate determination of global mode shapes and a family of modes on the cantilevered tiers. Further work is required to improve the post-test FE model, including characterisation of the behaviour of the non- structural elements, more accurate determination of cracked reinforced concrete section properties and inclusion of the roof structure.
This paper describes a unique test rig used for studying the behaviour of human subjects bouncing... more This paper describes a unique test rig used for studying the behaviour of human subjects bouncing or jumping on a flexible structure. The rig is essentially a single degree of freedom platform supported by a cantilever 'spring', with the natural frequency controlled by adjusting the position of a moveable support. The rig permits measurement of the force generated by the
... Paul Reynolds, Aleksandar Pavic and Zainah Ibrahim ... Frequency Domain Decomposition (FDD) [... more ... Paul Reynolds, Aleksandar Pavic and Zainah Ibrahim ... Frequency Domain Decomposition (FDD) [13], Enhanced Frequency Domain Decomposition (EFDD) [13] and ... These algorithms were applied to the raw time history data as well as to Random Decrement (RD) Signatures. ...
Ever increasing slenderness in modern long-span concrete floors, made possible through techniques... more Ever increasing slenderness in modern long-span concrete floors, made possible through techniques such as the use of prestressing, high-strength concrete and more efficient structural sections, is resulting in more frequent problems with their vibration serviceability. However, there is a lack of knowledge of how to model such structures appropriately and current simplified guidelines for assessment of vibration serviceability at the
... Modelling Approaches Aleksandar Pavic ... Corresponding author: Dr Aleksandar Pavic Departmen... more ... Modelling Approaches Aleksandar Pavic ... Corresponding author: Dr Aleksandar Pavic Department of Civil & Structural Engineering University of Sheffield Sir Frederick Mappin Building Sheffield S1 3JD E-mail: A.Pavic@Sheffield.ac.uk Tel: 0114-2225721 Fax: 0114-2225700 ...
... 2] on a range of parametrically varied foot-bridge structures ... Table 2. It should be notic... more ... 2] on a range of parametrically varied foot-bridge structures ... Table 2. It should be noticed that the fundamental frequency (3.4 Hz) of the cable-stayed footbridge is margin ... For the purpose of assessing vibration serviceability, the guidelines of the UK code (BSI 1978) were taken as ...
This paper describes an investigation of the dynamic behaviour of the City of Manchester Stadium ... more This paper describes an investigation of the dynamic behaviour of the City of Manchester Stadium in Manchester in the UK. A programme of pre-test numerical modelling, ambient and shaker modal testing and post-test FE modelling is described, with a view to providing insight into how future models of similar structures may be constructed in the future to better represent the actual dynamic behaviour. The modal testing of the structure showed a number of global and seating deck modes that are possible to be excited by dynamic crowd excitation. Some understanding of these modes was possible using simplified pre-test models, but to more accurately represent the behaviour of the stand, it was necessary to develop a full 3D FE model of the whole stand. This provides accurate determination of global mode shapes and a family of modes on the cantilevered tiers. Further work is required to improve the post-test FE model, including characterisation of the behaviour of the non- structural elements, more accurate determination of cracked reinforced concrete section properties and inclusion of the roof structure.
This paper describes a unique test rig used for studying the behaviour of human subjects bouncing... more This paper describes a unique test rig used for studying the behaviour of human subjects bouncing or jumping on a flexible structure. The rig is essentially a single degree of freedom platform supported by a cantilever 'spring', with the natural frequency controlled by adjusting the position of a moveable support. The rig permits measurement of the force generated by the
... Paul Reynolds, Aleksandar Pavic and Zainah Ibrahim ... Frequency Domain Decomposition (FDD) [... more ... Paul Reynolds, Aleksandar Pavic and Zainah Ibrahim ... Frequency Domain Decomposition (FDD) [13], Enhanced Frequency Domain Decomposition (EFDD) [13] and ... These algorithms were applied to the raw time history data as well as to Random Decrement (RD) Signatures. ...
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