부산대학교 도서관

Rigid barrier is a straightforward and effective countermeasure widely used for mitigating debris flow. However, in current designs, it remains unclear how to optimize the rigid barrier to enhance its mechanical properties. Therefore, this study investigates the influence of the shape of the upstream face of the rigid barrier, referred to as the ‘barrier shape’, on the impact dynamics of debris flow entraining a boulder onto rigid barrier. This study employs a coupled numerical approach involving smoothed particle hydrodynamics (SPH), the discrete element method (DEM), and the finite element method (FEM). The simulation results demonstrate that the barrier shape can affect the mechanical properties of the rigid barrier by altering the interaction mode between the debris flow and the barrier. Compared to vertical and slanted barriers, a curved barrier exhibits superior mechanical properties when subjected to debris flow impact. Furthermore, reducing the slope of the upstream face appropriately proves to be an effective method for enhancing the impact resistance of slanted barriers. The relevant findings from this study can serve as valuable references for the structural optimization of rigid barriers.