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    Review of the mechanisms of debris-flow impact against barriers

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    Author
    Poudyal, Sunil
    Choi, Clarence E.
    Song, Dongri
    Zhou, Gordon G.D.
    Yune, Chan-Young
    Cui, Yifei
    Leonardi, Alessandro
    Busslinger, Matthias
    Wendeler, Corinna
    Piton, Guillaume
    Moase, Emily
    Strouth, Alex
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    Date issued
    2019
    Keywords
    debris flows
    barriers
    impact mechanisms
    flow compositions
    
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    URI
    https://hdl.handle.net/11124/173112; http://dx.doi.org/10.25676/11124/173112
    Abstract
    Our limited understanding of the mechanisms pertaining to the force exerted by debris flows on barriers makes it difficult to ascertain whether a design is inadequate, adequate, or over-designed. The main scientific challenge is because flow-type landslides impacting a rigid barrier is rarely captured in the field, and no systematic, physical experimental data is available to reveal the impact mechanisms. An important consideration in flow-structure interaction is that the impact dynamics can differ radically depending on the composition of the flow. Currently, no framework exists that can characterize the impact behavior for a wide range of flow compositions. This review paper examines recent works on debris-flow structure interactions and the limitations of commonly used approaches to estimate the impact load for the design of barriers. Key challenges faced in this area and outlook for further research are discussed.
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