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dc.contributor.authorCorominas Dulcet, Jordi
dc.contributor.authorMatas Casado, Gerard
dc.contributor.authorRuiz Carulla, Roger
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.identifier.citationCorominas, J.; Matas, G.; Ruiz, R. Quantitative analysis of risk from fragmental rockfalls. "Landslides", Gener 2019, vol. 16, núm. 1, p. 5-21.
dc.descriptionThe final publication is available at Springer via
dc.description.abstractRockfalls are ubiquitous diffuse hazard in mountain regions, cliffs, and cutslopes, with the potential of causing victims and severely damaging buildings and infrastructures. A vast majority of detached rock masses break up when impacting the ground, generating multiple trajectories of rock fragments. In this paper, we present the quantitative risk analysis (QRA) of fragmental rockfalls. Fragmentation in rockfalls requires the redefinition of the probability of reach and the evaluation of the effect of multiple rock blocks trajectories on the exposure. An example of QRA was carried out at the Monasterio de Piedra, Spain, using RockGIS, a rockfall propagation model that takes fragmentation into account (Matas et al. Landslides 14:1565–1578, 2017). The results show that fragmentation has a significant but contrasting effect in the calculation of risk. The risk is reduced if the slope where blocks propagate is sufficiently long and gentle. The reason for this is that, compared to the unfragmented rock masses, the new fragments generated travel shorter distances with lesser kinetic energy. The effect disappears in case of large rockfalls. Conversely, the risk increases if the rock fragments propagate over steep slopes. The reason is that few blocks stop along the way while the generation of a cone of fragments increases the exposure. Our simulations also show that assuming a continuous flow of visitors or segregating the flow in groups of different number of people has only a minor influence on the results. Finally, we observed that the capability of the protection barriers to stop rockfalls of up to a few tens of cubic meters increases with fragmentation.
dc.format.extent17 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de roques
dc.subject.lcshLandslide hazard analysis
dc.subject.otherRockfall Fragmentation Quantitative risk analysis Rockfall modeling Case study
dc.titleQuantitative analysis of risk from fragmental rockfalls
dc.subject.lemacEsllavissades -- Avaluació del risc
dc.contributor.groupUniversitat Politècnica de Catalunya. EnGeoModels - Monitoring and Modelling in Engineering Geology
dc.contributor.groupUniversitat Politècnica de Catalunya. EGEO - Enginyeria Geomàtica
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
upcommons.citation.authorCorominas, J.; Matas, G.; Ruiz, R.

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