Research of collapsing process of high reinforced concrete chimney blasting demolition
Yan Zhi-xin1, 2; Ye Zhen-hui1, 2; Liu Pei-lin1, 2; Cao Xiao-hong1, 2
1.Key Laboratory of Western Chinas Environmental Systems, Ministry of Education, Lanzhou 730000,China;2. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China
Abstract：Both the height and the difficulty of chimney blasting demolition are increasing gradually. This paper establishes stress models of the supported segment of the remaining based on dynamic principle, and analyzes the regulation and the determining factor of the variation of cut neutral axis. The punching factor is used to consider with influence of sudden load. We adopt the node-split reinforced concrete model, and make the numerical simulation study of the reinforced concrete chimney collapse process by means of ANSYS/LS-DYNA. Through the analysis of the stress-time curve of reinforced concrete element, it is indicated that a node split model can reflect the difference of the mechanical properties between materials of steel and concrete.
言志信;叶振辉;刘培林;曹小红;. 钢筋混凝土高烟囱定向爆破拆除倒塌过程研究[J]. , 2011, 30(9): 197-201.
Yan Zhi-xin;;Ye Zhen-hui;;Liu Pei-lin;;Cao Xiao-hong;. Research of collapsing process of high reinforced concrete chimney blasting demolition. , 2011, 30(9): 197-201.
2011, Vol. 30 
