Authors / CoAuthors
Cechet, R.P. | Arthur, W.C. | Sanabria, A. | Yang, T.
Abstract
The National Wind Risk Assessment (NWRA) has developed a computational framework to evaluate both the wind hazard and risk due to severe wind gusts. A combination of tropical cyclone, synoptic and thunderstorm wind hazard estimates is used to provide a revised estimate of severe wind hazard across Australia. A national assessment of localised wind speed modifiers including topography, terrain and the built environment (shielding), has also been undertaken to inform the local wind speed hazard that causes damage to structures. Wind speed modifiers are incorporated through a statistical modification of the regional wind speed. The regional hazard modelling utilises both current-climate information and also simulations forced by IPCC SRES climate change scenarios, which are employed to determine how wind hazard will be influenced by climate change. We report on a national assessment of severe wind impact and risk to residential housing (quantified in terms of annualised loss). Results from the current climate regional wind hazard assessment are compared with the hazard based on the existing understanding as specified in the Australian/New Zealand Wind Loading Standard (AS/NZS 1170.2, 2011). Regions where the design wind speed depicted in AS/NZS 1170.2 is significantly lower than the hazard analysis provided by this study were mapped. These regions are discussed in the context of the minimum design standards in the building code regulations, where the development of adaptation options is likely.
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document
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73657
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- External Publication
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- risk assessment
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Published_Internal
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2012-01-01T00:00:00
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