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- W2242938571 abstract "Bridge damage due to earthquake ground motion can be extremely costly. Besides the threat from collapse to people on or below a bridge, major disruption to transport networks can also result from bridge closures. Closures will impact on emergency service response in the first instance and on the regional recovery in the longer term. This paper describes the method used by the Risk Research Group at Geoscience Australia (GA) to incorporate bridge infrastructure into earthquake risk assessments. This represents the Group's first attempt at assessing the impact of an earthquake on a transport network, predicting the consequences for discrete bridge assets but not addressing the interdependence of components on overall network functionality. Earthquake damage to highway (or rail) bridges can be estimated through the use of fragility curves. These permit the probability of a bridge being in a certain (defined) damage state to be calculated for a given input ground motion. Bridge fragility curves can be assigned to a structure using parameters such as age, structural material, structure type, number of spans, span continuity, bridge skew angle, and pier type. This study represents a step forward in earthquake risk assessment at GA, and provides a basic starting point for further advances in assessing highway transportation networks exposed to seismic hazard. Prior to this work earthquake risk at GA has assessed building damage and loss associated with this damage. Direct economic losses of this type are often the smaller component of regional impacts from natural hazard, and this consideration of transportation infrastructure is a move towards a more complete regional impact. The paper begins with some descriptions of typical bridge damage observed historically, before describing the methodology used at GA for calculating damage to bridge assets following an earthquake. The methodology is based on that used in HAZUS-MH in the US, and the fragility curves are also adopted from the HAZUS work. An example is provided to step through the methodology, and is followed by some comments on future work that may provide a better understanding of, and more accurate modelling of bridge damage due to earthquake ground motions, particularly in the Australian context." @default.
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- W2242938571 date "2005-01-01" @default.
- W2242938571 modified "2023-09-24" @default.
- W2242938571 title "Modelling Bridge Damage Due to Earthquake Ground Motions" @default.
- W2242938571 hasPublicationYear "2005" @default.
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