基于构件失效的RC框架结构泥石流灾害易损性分析OA

The vulnerability of buildings to debris flow hazards enables the prediction of structural fail-ure probability under debris flow conditions,thereby providing data references for the formulation of disaster prevention and mitigation strategies.Taking a four-story reinforced concrete frame as the re-search object,ABAQUS modeling was employed.Based on the structural damage characteristics un-der debris flow,a mechanical model for the local components on the ground floor of the building was established.By simulating the progressive collapse induced by partial component failure,a criterion for characterizing the building performance was established,represented by the number of component failures,failure locations,and damage conditions.This was then combined with the functional losses caused by debris flow deposition to form a vulnerability classification method for frame structures.Sub-sequently,the Monte Carlo simulation method was used to generate datasets and control errors in the interaction process between debris flow and buildings.A vulnerability analysis method for frame struc-tures encompassing structural analysis,damage evaluation,and failure probability calculation was de-veloped.The results indicated that:(1)compared to the impact of single-phase slurry flow,debris flow containing boulders significantly reduced the failure threshold of components,and this trend intensified with increasing flow depth.(2)The continuous failure of two or more adjacent frame columns could lead to severe building damage.(3)When assessing building damage,changes in the impact angle re-duced the intensity of debris flow directly experienced by building components,but also simultaneous-ly increased the probability of more components being damaged.