Abstract：Abstract: Research purposes: The study of the collapse and destruction of structures has been paid close attention widely. Based on an existent test model and its results, this paper proposed the critical condition of collapse and the corresponding protective methods when the impact load was acted on the steel frame-RC tube structures. It provided a guide for the research about the collapse of structure.
Research methods: A simulation analysis of the impact and collapse of the model structure with finite element software LS-DYNA was carried out. The analysis method was feasible after compared the results of the simulation analysis to the results of the test. Then, this paper analyzed 96 groups of the steel frame-RC tube structures using the same method, and formulated a simplified formula of the critical deflection for collapse using MATLAB. Finally, simulation analysis for the structure with protective measure against collapse was took with finite element software ABAQUS.
Research results: The results of the simulation analysis and the test were basically consistent. This paper returned the simplified formula of the critical deflection for collapse. The protective measure against collapse can significantly decrease the critical deflection for collapse of the structures.
Research conclusions: The method of the simulation analysis for the structure acted the impact load was feasible. The simplified formula was took which calculated accurately for the critical deflection for collapse. The results of the simulation analysis proved the measure against collapse to be valid.
熊世树，潘琴存，熊明祥. 钢框架组合结构的冲击倒塌分析与防倒措施研究[J]. 铁道工程学报, 2006, 23(8): 53-57.
XIONG Shi-shu, PAN Qin-cun, XIONG Ming-xiang. The Collapsed Analysis and Study of Protective Methods of Steel Frame with Composite Slab under Impact Load. 铁道工程学报, 2006, 23(8): 53-57.
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2006, Vol. 23 
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