Vulnerability of structures impacted by debris flow

摘要

As debris flow impacts a structure it sets the structure in vibratory motion. This article presentsa simple method for prediction of damage in a structure impacted by a debris flow of known magnitude. Themethod uses the principles of dynamic response of simple structures to earthquake excitation and fragility curvesproposed in HAZUS for estimation of the structural vulnerability,by the damage state probability. The methodwas tested by applying it to a debris flow site in Italy where the reported structural damages ranged from light tocomplete devastation. The vulnerability of six of the impacted structures was assessed by the proposed modeland compared with the real damage states.