Anti-progressive Collapse Analysis of a Building under Impact Load
-
摘要: 本文运用有限元模型，采用直接去柱和撞击去柱两种方法，模拟俄亥俄州立大学综合大楼拆除底层中柱的过程，对俄亥俄州立大学综合大楼的抗连续倒塌机制进行了分析，从而证明多层框架结构简化模型的合理性。通过对直接去柱法和撞击去柱法的对比，结果表明：用直接去柱法拆除中柱后，经过一段时间振荡最后达到平衡；而用撞击去柱法拆除中柱后，撞击点及正上方节点受到较大破坏。由此得知，抗连续倒塌研究应该结合具体灾害进一步分析，避免直接去柱法低估灾害对结构的影响。Abstract: 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.
-
[1] ASCE7-0.5 Minimum design loads for buildings and other structues[S].Virginia:American Society of Civil Engineers,2006. [2] 易伟建,何庆锋,肖岩.钢筋混凝土框架结构抗倒塌性能的试验研究[J].建筑结构学报,2007,28(5):104-109. [3] Song B I,Sezen H.Experimental and analytical progressive collapse assessment of a steel frame building[J].Engineering Structures,2013,56:664-672. [4] Yu H L,Jeong D Y.Application of a stress triaxiality dependent fracture criterion in the finite element analysis of unnotched charpy specimens[J].Theoretical and Applied Fracture Mechanics,2010,54(1):54−62. [5] 崔堃鹏,夏禾,夏超逸,等.汽车撞击桥墩瞬态撞击力的等效静力计算[J].振动与冲击,2014,33(4):48-53. -
点击查看大图
计量
- 文章访问数: 12
- HTML全文浏览量: 3
- PDF下载量: 1
- 被引次数: 0
下载: