Study of dynamic debris impact load on flexible debris-resisting barriers and the dynamic pressure coefficient

The use of steel flexible barriers to mitigate landslide risk on natural hillsides is becoming common in the past decade Hong Kong. current design approach for this kind barrier structure involves adoption hydrodynamic load model predict dynamic impact forces, followed by non-linear structural analyses using numerical programs based pseudo-static force method. From local guidelines, pressure coefficient, a critical input parameter model, taken as 2.0. This empirically considers effect impacts from boulders up 2.0 m diameter. With view rationalising approach, series physical tests and was conducted investigate debris resulting response. involved 9 3 resisted 1.5 high ring-net barrier. were 28 long large-scale flume facility at Kadoorie Centre Numerical modelling computer LS-DYNA NIDA-MNN analyse response with different forms. study aims evaluate coefficient verify suggested study. Results indicate that 1.0 is, general, appropriate purposes if comprises primarily water fine-grained particles.