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《Journal of Vibration and Shock》 2011-09
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Collapsing process of high reinforced concrete chimney in 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 )  
Stress models of the remained supporting segment of a high reinforced concrete chimney in blasting demolition was established based on dynamics principle.The regulation and the governing factors of the variation of neutral axis of cutting faces were analysed.The punching factor was used to consider the influence of sudden load.Adopting the node-split reinforced concrete model,the collapse process was numerically simulated 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.
【Fund】: 甘肃省科技支撑计划项目(1011GKCA019);; 甘肃省建设科技攻关项目(JK2010-43)
【CateGory Index】: TU746.5
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