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Deriving expert-driven seismic and wind fragility functions for non-engineered residential typologies in Batanes, Philippines
Hadlos, A.; Opdyke, A.; Hadigheh, S.A. (2023). Deriving expert-driven seismic and wind fragility functions for non-engineered residential typologies in Batanes, Philippines. NPG Scientific Reports 13(1): 22008. https://dx.doi.org/10.1038/s41598-023-49398-2
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
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| Auteurs | | Top |
- Hadlos, A.
- Opdyke, A.
- Hadigheh, S.A.
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| Abstract |
Natural hazards inflict significant damage to dwellings in the Philippines where housing is often the most valued asset of households. Residential fragility functions estimate structural damage to mitigate risk but these are challenging to derive when empirical and analytical data are lacking, as is common in rural areas. Too often, conventional fragility estimates overlook the characteristics of informally built or non-engineered dwellings common in rural areas. We used a heuristic alternative of deriving fragility functions relying on experts’ judgements to understand the housing performance of non-engineered residential typologies in the Province of Batanes in the Philippines. Drawing on field surveys in the Municipality of Itbayat, we identified and defined seven prominent typologies. Based on the Applied Technology Council’s expert-driven method of deriving fragility functions, 18 experts estimated the damage states of these typologies against the impacts of earthquakes and typhoons which are the two most prominent hazards in the region. Our findings provide first-generation fragility functions for Batanes as a step towards more localised risk assessment in the Philippines. More broadly, these functions can be used for typologies identified beyond Batanes where similar structural characteristics are prevalent. |
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