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An Enhancement of Earthquake Vulnerability Models for Australian Residential Buildings Using Historical Building Damage

Created 17/10/2025

Updated 17/10/2025

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Geoscience Australia (GA) has developed the Earthquake Risk Model (EQRM) as an open source software for earthquake hazard and risk assessment. In the EQRM, the likelihood of physical damage states of the building and the direct economic loss from the damage to structural and non-structural building components are estimated using fragility and vulnerability models, respectively. The methodology implemented in the EQRM to compute the likelihood of physical damage states and the economic loss is similar to the HAZUS methodology, which is based on the capacity spectrum method applied to a generalized Single-Degree-Of-Freedom (SDOF) model of the building. One limitation of the current approach is identified, which is the underestimation of the damage probability for non-structural acceleration-sensitive components with a consequent underestimation of economic loss. This underestimation is found to be more problematic for larger ground shaking intensities. To overcome the limitation of the current methodology, nonlinear time history analysis of a SDOF model is performed which enables the building of a relationship between absolute response acceleration and peak ground acceleration. The relationship is then used in computing damage probability for non-structural acceleration-sensitive components instead of using the spectral acceleration of the performance point computed using the capacity spectrum method. The effect of the refined vulnerability models is highlighted and discussed in scenario impact assessment for a building portfolio in Newcastle, Australia.

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Field Value
Title An Enhancement of Earthquake Vulnerability Models for Australian Residential Buildings Using Historical Building Damage
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/27afd184-7a46-4712-8d32-a34b2c629906
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 22/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "An Enhancement of Earthquake Vulnerability Models for Australian Residential Buildings Using Historical Building Damage". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/an-enhancement-of-earthquake-vulnerability-models-for-australian-residential-buildings-using-hi1