1.College of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000,Henan,china
2.China University of Mining &Technology(Beijing), Beijing 100083
3.Luoyang Institute of Science and Technology ,Luoyang 471023, Henan,china
Abstract:Based on the high-speed photography monitoring results and numerical simulation results, the author analyzed and studied the collapse process and load-bearing process of reinforced concrete chimney by blasting demolition comprehensively. the collapse process of reinforced chimney experienced four stages that including the formation of blasting cut, the formation of neutral axis, fixed-axis rotation and collapsing touchdown, The remained supporting segment should have a stable stage of 0.5s~3.0s to ensure the formation of the neutral axis in the process of load redistribution. The remained supporting segment under compressive stress after the formation of a blasting cut, and this compressive stress state duration is very short. Then appeared the pressure areas and tensile region; the acute angle of directional window has the high degree of stress concentration, it be destroyed firstly, and the medial part has the larger compressive stress. Research results have important practical significance for improving the accurate theory of reinforced concrete chimney blasting demolition.
褚怀保1,徐鹏飞2,叶红宇1, 杨小林1,3. 钢筋混凝土烟囱爆破拆除倒塌与受力过程研究[J]. 振动与冲击, 2015, 34(22): 183-186.
Chu Huai-bao1,XU Pemg-fei2,YE Hong-yu1,YANG Xiao-lin3. Research on the collapse process and load-bearing process of reinforced concrete chimney by blasting demolition. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(22): 183-186.
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