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Review of the mechanisms of debris-flow impact against barriers
Poudyal, Sunil Choi, Clarence E. Song, Dongri Zhou, Gordon G.D. Yune, Chan-Young Cui, Yifei Leonardi, Alessandro Busslinger, Matthias Wendeler, Corinna Piton, Guillaume
Poudyal, Sunil
Choi, Clarence E.
Song, Dongri
Zhou, Gordon G.D.
Yune, Chan-Young
Cui, Yifei
Leonardi, Alessandro
Busslinger, Matthias
Wendeler, Corinna
Piton, Guillaume
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2019
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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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