When dealing with seismic reliability assessment of structural systems, many uncertainty sources have to be handled by the risk analyst, who is asked to make some reasonable assumptions in order to carry out his/her seismic safety quantification. Indeed, slight changes in the definition of input parameters and/or the use of different empirical or analytical models can strongly impact the final reliability outcomes. The present work aims therefore to first analyse this issue clearly highlighting all possible sources of uncertainties that an analyst must face with, and then investigate their impact on the final reliability index variability via the use of a case-study represented by an existing multi-span steel-concrete composite bridge to better understand which of these sources is more impacting on the final estimates.

Impact of hazard and fragility related uncertainties on seismic reliability assessment of existing structures

Hofer L.;Toska K.;Zanini M. A.;Faleschini F.;Pellegrino C.
2024

Abstract

When dealing with seismic reliability assessment of structural systems, many uncertainty sources have to be handled by the risk analyst, who is asked to make some reasonable assumptions in order to carry out his/her seismic safety quantification. Indeed, slight changes in the definition of input parameters and/or the use of different empirical or analytical models can strongly impact the final reliability outcomes. The present work aims therefore to first analyse this issue clearly highlighting all possible sources of uncertainties that an analyst must face with, and then investigate their impact on the final reliability index variability via the use of a case-study represented by an existing multi-span steel-concrete composite bridge to better understand which of these sources is more impacting on the final estimates.
2024
Procedia Structural Integrity
2nd FABRE Conference on Existing Bridges, Viaducts and Tunnels: Research, Innovation and Applications, FABRE 2024
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/3539653
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