Joël Borner

I develop rockfall simulation models that combine rigid-body dynamics, nonsmooth contact laws, and physics-based representations of ground interaction, fragmentation, roughness and forest effects. My work focuses on creating computationally efficient tools that reflect the most up-to-date understanding of rockfall mechanics while remaining practical for engineering applications. This includes probabilistic modelling approaches, sliding–rolling transition analyses, and interfaces to modern workflows, as well as continuous integration of new models into existing simulation software.

I work with engineers, authorities and forest services to improve natural hazard assessment and mitigation strategies. This includes developing practical tools for hazard evaluation, leading workshops and training on simulation software, and supporting applied projects such as sliding deadwood hazard assessment or the monitoring of snow creep forces on structures. By integrating experimental insights, field documentation and modern modelling approaches, my work aims to reduce uncertainties and support consistent, transparent and scalable decision-making in natural hazard management.

The following applications experiment with simple analytical approaches to calculate snow impact pressures using mass conservation and plastic material compaction. The approaches are highly experimental, not peer-reviewed and should be used with caution. 

Derivation of the formulas can be found here.