The dynamic analysis of free-surface, rapidly varied dense granular flows is of great concern in several field of the engineering. In particular, this topic is relevant when dealing with rainfall-induced shallow landslides that represent the most common natural hazards in some areas of the world (Bordoni et al, 2015). Beside the assessment of the triggering zones for defining maps of shallow landslides' susceptible areas, could be of interest also the analysis of their propagation for assessing landslide run-out associated risk with respect to sensible targets (i.e. civil structures and infrastructures). Here are illustrated the basic aspects of a lagrangian, mesh-free particle method (SPH) that has been successfully adopted to treat landslide motion and the hydrodynamic action on non-cohesive sediment. SPH could be extended to the dynamic analysis of rainfall-induced shallow landslides, especially those ones classified as complex landslides that, starting as shallow rotational-translational failures, change into earth flows owing to the large water content and behave like dense granular flow. The load caused by the landslide impact on fixed obstacles (e.g. bridge piles or retaining walls) can be also evaluated through the SPH approach (Di Monaco et al., 2011).
A LAGRANGIAN PARTICLE MODEL FOR LANDLSIDE DYNAMICS AND WATER-SEDIMENT INTERACTION
MANENTI, SAURO
2016-01-01
Abstract
The dynamic analysis of free-surface, rapidly varied dense granular flows is of great concern in several field of the engineering. In particular, this topic is relevant when dealing with rainfall-induced shallow landslides that represent the most common natural hazards in some areas of the world (Bordoni et al, 2015). Beside the assessment of the triggering zones for defining maps of shallow landslides' susceptible areas, could be of interest also the analysis of their propagation for assessing landslide run-out associated risk with respect to sensible targets (i.e. civil structures and infrastructures). Here are illustrated the basic aspects of a lagrangian, mesh-free particle method (SPH) that has been successfully adopted to treat landslide motion and the hydrodynamic action on non-cohesive sediment. SPH could be extended to the dynamic analysis of rainfall-induced shallow landslides, especially those ones classified as complex landslides that, starting as shallow rotational-translational failures, change into earth flows owing to the large water content and behave like dense granular flow. The load caused by the landslide impact on fixed obstacles (e.g. bridge piles or retaining walls) can be also evaluated through the SPH approach (Di Monaco et al., 2011).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
