抄録
This paper discusses the design load modeling of the debris flow which acts on the check dam structure from the view point of the redundancy of the design and proposes a new design load modeling. The actual case of a damaged steel frame check dam structure is treated with a theme of the discussion. Based on the redundancy concept which is evaluating the survivability of the structure against an unexpected load condition, the damaged accident is analyzed step by step. First, it is confirmed that the structure was designed property against the design load condition. Secondly, the uniform load of which amount is computed based on the actual debris flow condition can not be necessarily estimating the failure of the structure. Thirdly, irregularly distributed load of which total amount is equal to the uniform one causes an unsafe condition of structure similar to the actual damage. Finally, a revised design load modeling is proposed and discussed from the view point of the redundancy improvement.
