LARGE-NONLINEAR DEFORMATION FINITE ELEMENT MODELLING OF FLOW-STRUCTURE INTERACTION
A 3D coupled large-deformation finite element model has been benchmarked against several well-documented physical flows. The model uses an Arbitrary Lagrangian-Eulerian formulation, which discretises the computational domain into a mesh of elements. Elements are allowed to move arbitrarily and the shape of the elements are optimised, enabling large deformation of the debris flow. This model enables the interaction between the debris flow and flexible barriers to be modelled using finite-element contacts.
LARGE-SCALE PENDULUM IMPACT TESTS
A site was setup to investigate the dynamics response of baffles subjected to boulder impact. Impact energies of up to 100 kJ were modelled. Findings can directly be used to optimise the design of baffles and straining structures.
SUBMARINE DEBRIS FLOWS
A bench top physical model set up to investigate the flow dynamics of submarine debris flows. Submarine debris flows are known to travel long distances and are several orders in volume greater than subaerial debris flows.
28-M LONG FLUME TEST AT HKU KADOORIE CENTRE
This video shows a typical flume experiment of a debris flow impacting a flexible barrier. More details to come..
DEBRIS FLOW INTERACTION WITH FORESTS: SPH
To back-analyse physical model tests looking at flow-structure interaction, a single phase Material Point Method (MPM) has been developed. More complex constitutive behaviour will be incorporated in the future, including shear rate dependent rheology and softening.
EVENT-DRIVEN SMART SENSOR
A collaborative project was funded by the The Hong Kong Jockey Club Disaster Preparedness and Response Institute (HKJCDPRI) to evaluate a smart-landslide impact detection system. The event-driven sensor does not require power and is triggered mechanically. This device sends a signal to an IT platform to notify engineers when barriers are impacted.