Research of collapsing process of high reinforced concrete chimney blasting demolition

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (9) : 197-201.

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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

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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.

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cutting-support stress / high reinforced concrete chimney / separate models / blasting demolition / ANSYS/LS-DYNA

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Yan Zhi-xin;;Ye Zhen-hui;;Liu Pei-lin;;Cao Xiao-hong;. Research of collapsing process of high reinforced concrete chimney blasting demolition[J]. Journal of Vibration and Shock, 2011, 30(9): 197-201