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《Blasting》 2008-02
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Back Sitting of Frame & Framed Bent Demolished by Blasting(1)

WEI Ting-feng,WEI Xiao-lin,FU Jian-qiu(Guangdong Hongda Blasting Engr Co Ltd,Guangzhou 510623,China)  
Behind sitting mechanism of directional topping of frame,framed bent and framed shear wall construction demolished by blasting is studied.After front and central pillars are demolished,weight centre of building above cutting storeys tends to fall along weight line with the shortest distance to grand,causing plastic joint on top above pillar of cutting storeys in cast-in-site reinforced concrete frame to form mechanismic sitting back.Connecting joint on behind pillar top of frame bent is moved back causing pillar to fall back.The weight centre on every floor of fabricated reinforced concrete frame is lower than plastic joints of beam head connected with behind pillar.The behind pillar is drawn and leans forward.The pillar root is pushed by its weight force and slipped back.For framed shear wall construction,which pillar stability resisted of bending and press is hardened by lengthwise and cross shear walls and the construction is supported by behind pillar,the weight centre of construction is forced to fall forward and circle around behind pillar foot.Its root is pushed by its weight force and slips back.For multiple spans of the cast-in-site reinforced concrete frame,which behind 2 pillars is weakened by cutting,its weight centre may be forced to fall forward and circle around behind pillar root.Its pillars root may be pushed by its weight force and slips back.Back sitting and its resistance force of construction is calculated by dynamics equation and its approximate solutions.The judge of condition slipping back of behind pillar is promoted.The falling back and sliding of behind pillar is estimated.The error of back sitting between approximate and numerical solution of dynamics equation is within 5%,which is acceptable in engineering application.The principle and method calculating back sitting and behind width of blasting building heap have been demonstrated to be proper and useful by calculating examples of building demolished by basting.
【CateGory Index】: TU746.5
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【References】
Chinese Journal Full-text Database 3 Hits
1 WEI Ting-feng,WEI Xiao-ling,FU Jian-qiu(Guangdong Hongda Blasting Co Ltd,Guangzhou 5100623,China);Measures for Reducing Backward Action in Explosive Demolition of Frame Structure(2)[J];Blasting;2009-03
2 HU Hao-chuan1,CHI En-an1,2,YUE Song1(1.Guizhou Xinlian Blasting Engineering Limited Corp,Guiyang 550002,China;2.School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China);Briefly Analysis of Directional Explosive Demolition of Building Detail[J];Blasting;2010-03
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【Citations】
Chinese Journal Full-text Database 3 Hits
1 FU Jian-qiu 1,2,WEI Xiao-lin 1,2,WANG Xu-guang1(1.Beijing University of Science and Technology,Beijing 100083,China;2.Guangdong Hongda Blasting Engineering Co Ltd,Guangzhou 510055,China);Study on Dynamics Equation Approximation of Blasting Demolition of Structures(1)[J];Blasting;2007-03
2 WEI Xiao-lin1,2,FU Jian-qiu1,2,WANG Xu-guang1,CUI Xiao-rong2(1.Beijing University of Science and Technology,Beijing 100083,China;2.Guangdong Hongda Blasting Engineering Co Ltd,Guangzhou 510055,China);Study on Dynamics Equation Approximation of Blasting Demolition of Structures(2)[J];Blasting;2007-04
3 ZHENG Bingxu1,2,WEI Xiaolin1,2,CHEN Qingshou1(1.China University of Geosciences,Beijing 100083,China;2.Guangdong Hongda Blasting Engineering Co.,Ltd.,Guangzhou,Guangdong 510055,China);MECHANICAL ANALYSIS OF CUTTING-SUPPORT DESTABILIZATION OF HIGH REINFORCED CONCRETE CHIMNEY[J];Chinese Journal of Rock Mechanics and Engineering;2007-S1
【Co-citations】
Chinese Journal Full-text Database 7 Hits
1 LU Hua,FU Jian-qiu,CUI Xiao-rong(Guangdong Hongda Blasting Co Ltd,Guangzhou 510023,China);Building Collapse in Vertical During Blasting Demolition of Large-scale Gymnasium[J];Blasting;2008-03
2 CUI Xiao-rong,WANG Dian-guo,LU Hua (Guangdong Hongda Blasting Engineering Co Ltd,Guangzhou 510623,China);Directional Blasting of 100-meter Reinforced Concrete Chimney[J];Blasting;2008-04
3 WEI Ting-feng,WEI Xiao-ling,FU Jian-qiu(Guangdong Hongda Blasting Co Ltd,Guangzhou 5100623,China);Measures for Reducing Backward Action in Explosive Demolition of Frame Structure(2)[J];Blasting;2009-03
4 YE Zhen-hui1,2,YAN Zhi-xin1,2(1.Key Laboratory Mechanics on Western Disaster and Environment ofMinistry of Education,Lanzhou 730000,China;2.College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China);RESEARCH ON BRICK CHIMNEY COLLAPSING PROCESS BY DIRECTIONAL BLASTING DEMOLITION[J];Engineering Blasting;2010-01
5 YAN Zhi-xin1,2,YE Zhen-hui1,2,LIU Pei-lin1,2(1.Key Laboratory of Mechanics on Disaster and Environment in Western China,The Ministry of Education of China,Lanzhou 730000,Gansu,China; 2.School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,Gansu,China);Collapsing process of chimney demolition by directional blasting[J];Explosion and Shock Waves;2010-06
6 WEI Xiao-lin,WEI Ting-feng(Guangdong Hongda Blasting Engineering Co.Ltd.,Guangzhou 510623,China);Dynamic equations for sitting down of high buildings demolished by blasting[J];Journal of Hefei University of Technology(Natural Science);2009-10
7 WEI Xiao-lin,ZHENG Bing-xu,FU Jian-qiu(Guangdong Hongda Blasting Engineering Co.Ltd.,Guangzhou 510623,China);Analytical solution to the dynamic equation of toppling buildings demolished by blasting[J];Journal of Hefei University of Technology(Natural Science);2009-10
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1 YAN Zhi-xin1,2,YE Zhen-hui1,2,LIU Pei-lin1,2(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);Research of Broke-Down Process of Reinforced Concrete Chimney Blasting Demolition[A];[C];2010
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 Chi Enan; Wen Yuanfu(Guizhou Xin Lian Blast Engineering Limityed Co);Practice of controlled Blasting in Part a business building7-51 # Zhong Hua Street in Guiyang City[J];BLASTING;1998-01
2 SHEN Chao-hu (Research and Design Institute of Engineering Science , Chengdu Military District ,Kunming 650031, China);Demolition of Communication Building in Power Plant by Controlled Blasting[J];Blasting;2004-04
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7 ZHAO Zhou-neng~1, CHENG Gui-hai~1, ZHANG Jian-ping~2(1.Guangxi University,Nanning,Guangxi 530004,China; 2.Department of Biological and Engineering,Guangxi University of Technology,Liuzhou,Guangxi 545006,China);DEMOLITION OF A HIGHRISE CLOSE TO A BUILDING TO BE PROTECTED BY DIRECTIONAL BLASTING[J];Engineering Blasting;2004-04
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9 HUANG Shi-hui,ZHU Jun,ZHU Li-chang,WANG De-chang(Shanghai Shuguang Blasting engineering Company Ltd.,Shanghai 200437,China);BLASTING DEMOLITION OF A 68m FRAME AND SHEAR WALL HIGH-RISE BY IMPLOSION[J];Engineering Blasting;2007-02
10 WEI Ting-feng,WEI Xiao-ling,FU Jian-qiu(Guangdong Hongda Blasting Co Ltd,Guangzhou 5100623,China);Measures for Reducing Backward Action in Explosive Demolition of Frame Structure(2)[J];Blasting;2009-03
【Secondary References】
Chinese Journal Full-text Database 2 Hits
1 HU Hao-chuan1,CHI En-an1,2,YUE Song1(1.Guizhou Xinlian Blasting Engineering Limited Corp,Guiyang 550002,China;2.School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China);Briefly Analysis of Directional Explosive Demolition of Building Detail[J];Blasting;2010-03
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