Anti-progressive Collapse Analysis of a Building under Impact Load

The finite element model was used to simulate the process of demolishing the bottom middle column of the Ohio State University by means of direct column removal and impact column removal, and the antiprogressive collapse mechanism of the Ohio State University was analyzed, so as to prove the rationality of the simplified model of multi-storey frame structure. Through the comparison between the direct column removal method and the impact column removal method, the results show that: the equilibrium is finally reached after a period of oscillation by the direct column removal method; the impingement point and the node directly above are damaged greatly when the middle column is removed by impingement. It is concluded that the study of progressive collapse resistance should be further analyzed in combination with specific disasters to avoid underestimating the impact of disasters on structures by direct column removal method.