Authors / CoAuthors
Divi, C.B. | Cechet, R.P. | Nadimpalli, K.
Abstract
The current study has developed a national methodology for assessing the hazard that peak wind gusts pose to Australian communities. The key components of the hazard assessment model include the regional wind hazard and the hazard modification multipliers. The local effects on return period regional wind speeds were determined utilising remote sensing techniques, digital elevation data, and formulae presented in the wind loadings standard AS/NZS 1170.2 [1]. The estimation of the local wind speeds was evaluated by combining the local wind multipliers (terrain/height, shielding and topographic) for eight cardinal directions with the return period regional wind speeds (from [1]) on a 25 metre grid across the areas examined for each region. Here we seek to use the 500 year return period wind gust hazard from the Australian/New Zealand wind loadings standard (AS/NZS 1170.2) [1], which is a building design document that seeks to 'envelope' possible wind effects, as a proxy for the regional hazard. Arthur et al. [2] provide a new hazard assessment for the Australian continent, which we plan to utilise in future updates. Tanh and Letchford [3] compared current US, Australian/New Zealand, European and Japanese wind standards and reported that the treatment of topographic effects in these design standards is on the whole conservative. Holmes [4] proposed adjustments to remove the conservatism from the methods in the Australian wind loading standard to assess risk. These proposals and several other initiatives were adopted to improve various components of the model from its initial steps [5] towards a reliable nationally consistent wind hazard assessment for Australia.
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nonGeographicDataset
eCat Id
70761
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
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- External Publication
- ( Theme )
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- wind
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2010-01-01T00:00:00
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