Flexible rockfall barriers are effective structures for rockfall risk mitigation, capable to withstand very high impact energies, up to 10000 kJ. The assessment of the barriers is demanded to the appropriate European Assessment Document EAD 340059-00-0106 (EOTA, 2018): it ties the performance to a standard test procedure, in which the net is the only impacted element. Despite this impacting case is representative of the majority of the cases, other impact positions are possible, e.g. on the supporting elements. Hence, the debate on the performance assessment for the rockfall barriers is still open. The producing company Geobrugg AG has recently conducted experimental tests producing an impact at the midspan of an internal steel post on a 500 kJ rockfall barrier. In this paper, a numerical back-analysis of these tests is performed to analyze the failure mechanisms and to be able to extend the results for different impact positions on the structural element, evaluating the system effectiveness.
Numerical back-analysis of impacted rockfall barriers steel posts: discussion on the effectiveness of the system / Pimpinella, Francesco; Marchelli, Maddalena; Lanter, Andreas; De Biagi, Valerio. - (2024), pp. 1-4. (Intervento presentato al convegno International Landslides Symposium 2024 tenutosi a Chambery (Fr) nel 8-12/07/2024).
Numerical back-analysis of impacted rockfall barriers steel posts: discussion on the effectiveness of the system
Pimpinella, Francesco;Maddalena, Marchelli;De Biagi, Valerio
2024
Abstract
Flexible rockfall barriers are effective structures for rockfall risk mitigation, capable to withstand very high impact energies, up to 10000 kJ. The assessment of the barriers is demanded to the appropriate European Assessment Document EAD 340059-00-0106 (EOTA, 2018): it ties the performance to a standard test procedure, in which the net is the only impacted element. Despite this impacting case is representative of the majority of the cases, other impact positions are possible, e.g. on the supporting elements. Hence, the debate on the performance assessment for the rockfall barriers is still open. The producing company Geobrugg AG has recently conducted experimental tests producing an impact at the midspan of an internal steel post on a 500 kJ rockfall barrier. In this paper, a numerical back-analysis of these tests is performed to analyze the failure mechanisms and to be able to extend the results for different impact positions on the structural element, evaluating the system effectiveness.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2991167