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Progressive collapse of 2D reinforced concrete structures under sudden column removal

Frontiers of Structural and Civil Engineering 2020年第6期14卷 1387-1402页

作者： EI Houcine MOURID Said MAMOURI Adnan IBRAHIMBEGOVIC Mechanics of Structures Laboratory MechanicsModeling and Experimentation Laboratory.Department of Mechanical EngineeringUniversity of Tahri Mohamed-Bechar Bechar 08000Algeria Roberal Mechanics laboratory Alliance Sorbonne UniversiyCompiegne 60203France

Once a column in building is removed due to gas explosion,vehicle impact,terrorist attack,earthquake or any natural disaster,the loading supported by removed column transfers to neighboring structural *** these elements are unable to resist the supplementary loading,they continue to fail,which leads to progressive collapse of *** this paper,an efficient strategy to model and simulate the progressive collapse of multi-story reinforced concrete structure under sudden column removal is *** strategy is subdivided into several connected steps including failure mechanism creation,MBS dynamic analysis and dynamic contact simulation,the latter is solved by using conserving/decaying scheme to handle the stiff nonlinear dynamic *** effect of gravity loads,structure-ground contact,and structure-structure contact are accounted for as *** main novelty in this study consists in the introduction of failure function,and the proper manner to control the mechanism creation of a frame until its total ***,this contribution pertains to a very thorough investigation of progressive collapse of the structure under sudden column *** proposed methodology is applied to a six-story frame,and many different progressive collapse scenarios are *** results ilustrate the efficiency of the proposed strategy.

关键词： failure mechanism MBS dynamic analysis gravity loads structure-ground contact structure-structure contact energy conserving decaying scheme

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