On collapsing disintegration and vibration of a cooling tower subjected to blasting demolition

FEI Honglu; ZHANG Chaoyi; LÜ Jinqi; ZHANG Longfei

doi:10.11883/bzycj-2017-0414

Volume 39 Issue 2

Feb. 2019

Turn off MathJax

Article Contents

Article Navigation > Explosion And Shock Waves > 2019 > 39(2): 025201

FEI Honglu, ZHANG Chaoyi, LÜ Jinqi, ZHANG Longfei. On collapsing disintegration and vibration of a cooling tower subjected to blasting demolition[J]. Explosion And Shock Waves, 2019, 39(2): 025201. doi: 10.11883/bzycj-2017-0414

Citation:

FEI Honglu, ZHANG Chaoyi, LÜ Jinqi, ZHANG Longfei. On collapsing disintegration and vibration of a cooling tower subjected to blasting demolition[J]. Explosion And Shock Waves, 2019, 39(2): 025201. doi: 10.11883/bzycj-2017-0414

Citation:

PDF( 2504 KB)

On collapsing disintegration and vibration of a cooling tower subjected to blasting demolition

doi: 10.11883/bzycj-2017-0414

1.
Blasting Technology Research Institute, Liaoning Technical University, Fuxin 123000, Liaoning, China
2.
Neimenggu Hongda Blasting Engineering Co. Ltd., Baotou 014010, Inner Mongolia, China

Received Date: 2017-11-17
Rev Recd Date: 2018-03-04
Publish Date: 2019-02-05

Abstract

Abstract

In order to study the blasting demolition of the cooling tower with compound incisions, the plastic hinge theory is used to analyze the motion state of the cooling tower in the whole collapse process. The mathematical model for the tower body instantly hitting the ground is established. And the maximum linear strain theory is considered to be the mechanical basis for the breakage of the tower wall. Analysis is carried out by the MATLAB numerical software. Analyzed results display that in addition to the wall at the incisions, the upper tower wall will undergo breakup and disintegration. This phenomenon coincides with the actual situation. When the explosive is determined, the coordinate value of the upper broken section decreases with the increase of the rotational extremum of the plastic hinge. In addition, the peak vibration velocity induced by the continuous collapse of the tower body hit the ground with blink section plastic hinge extreme increases. This conclusion is deducted by analyzing the of the tower-body continuous collapse that is the most harmful to the surrounding buildings during the blasting process. In view of that, the excessive total delay time should be avoided for the cooling-tower blasting in the future, so as to control the rotation angle of the tower and reduce the harm induced by cooling-tower blasting to surrounding buildings.
- cooling tower,
- blasting demolition,
- plastic hinge,
- breakup and disintegration,
- continuous collapse,
- vibration

FullText(HTML)

References(19)

References

[1]	谢先启, 姚颖康, 贾永胜, 等.冷却塔爆破拆除失稳机制与变形破坏特征研究[J].爆破, 2017, 34(2):40-46. doi: 10.3963/j.issn.1001-487X.2017.02.007 XIE Xianqi, YAO Yingkang, JIA Yongsheng, et al. Study on instability mechanism and deformation characteristics of hyperbolic cooling tower explosive demolition[J]. Blasting, 2017, 34(2):40-46. doi: 10.3963/j.issn.1001-487X.2017.02.007
[2]	李守巨, 费鸿禄, 张立国, 等.爆破拆除冷却塔倾倒过程的研究[J].爆炸与冲击, 1995, 15(3):282-288. doi: 10.3321/j.issn:1001-1455.1995.03.001 LI Shouju, FEI Honglu, ZHANG Liguo, et al. Research on the falling process of cooling towers in destruction work[J]. Explosion and Shock Waves, 1995, 15(3):282-288. doi: 10.3321/j.issn:1001-1455.1995.03.001
[3]	GLAISTER S, PINHO R. Developmengt of a simplified deformation-based method for seismic vulnerability assessment[J]. Journal of Earthquake Engineering, 2003, 7(1):107-140. doi: 10.1080/13632460309350475
[4]	PRIESTLEY M J N. Displacement-based seismic assessment of reinforced concrete buildings[J]. Journal of Earthquake Engineering, 1997, 1(1):157-192. DOI: 10.1080/13632469708962365.
[5]	司炳君, 孙治国, 杜修力, 等.钢筋混凝土桥墩地震弯剪破坏机理与震后快速修复技术研究[J].土木工程学报, 2011, 44(7):90-99. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK201101418540 SI Bingjun, SUN Zhiguo, DU Xiuli, et al. Study on the seismic flexural-shear damage mechanisms and rapid repair techniques for earthquake damage bridge piers[J]. China Civil Engineering Journal, 2011, 44(7):90-99. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK201101418540
[6]	BAYRAK O, SHEIKH S A. Plastic hinge analysis[J]. Journal of Structural Engineering, 2001, 127(9):1092-1100. DOI: 10.1061/(ASCE)0733-9445(2001)127:9(1092).
[7]	邓国红, 郭长文.理论力学[M].重庆:重庆大学出版社, 2013:289-291.
[8]	周泽平, 王明洋, 冯淑芳, 等.钢筋混凝土梁在低速冲击下的变形与破坏研究[J].振动与冲击, 2007, 26(5):99-103;157. doi: 10.3969/j.issn.1000-3835.2007.05.028 ZHOU Zeping, WANG Mingyang, FENG Shufang, et al. Deformation and failure of a reinforced beam under low velocity impact[J]. Journal of Vibration and Shock, 2007, 26(5):99-103;157. doi: 10.3969/j.issn.1000-3835.2007.05.028
[9]	龙源, 纪永适, 张可玉.高耸筒形结构物爆破切口计算原理研究[J].工程爆破, 1995(2):16-21. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199500091641 LONG Yuan, JI Yongshi, ZHANG Keyu. Study on calculation principle of blasting cut of towering tubular buildings[J]. Engineering Blasting, 1995(2):16-21. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199500091641
[10]	钱七虎.防护结构计算原理[M].南京:工程兵工程学院, 1981:170-178.
[11]	褚怀保, 侯爱军, 徐鹏飞, 等.冷却塔高卸荷槽复式切口爆破控制振动机理研究[J].振动与冲击, 2014, 33(9):195-199. http://d.old.wanfangdata.com.cn/Periodical/zdycj201409036 CHU Huaibao, HOU Aijun, XU Pengfei, et al. Vibration control mechanism of composite cut blasting technology of high load relieving groove of a cooling tower[J]. Journal of Vibration and Shock, 2014, 33(9):195-199. http://d.old.wanfangdata.com.cn/Periodical/zdycj201409036
[12]	田力, 朱聪, 王浩, 等.碰撞冲击荷载作用下钢筋混凝土柱的动态响应及破坏模式[J].工程力学, 2013, 30(2):150-155. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QKC20132013051500049688 TIAN Li, ZHU Chong, WANG Hao, et al. Dynamic response and failure modes of RC columns under impact[J]. Engineering Mechanics, 2013, 30(2):150-155. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QKC20132013051500049688
[13]	孙训方.材料力学:Ⅰ[M].北京:高等教育出版社, 2009:234-246.
[14]	魏晓林.建筑物倒塌动力学(多体-离散体动力学)及其控制爆破拆除控制技术[M].广州:中山大学出版社, 2011:59-60.
[15]	徐鹏飞, 褚怀保, 张英才.冷却塔在高卸荷槽切口下爆破拆除振动数值分析[J].工程爆破, 2014, 20(4):11-14. doi: 10.3969/j.issn.1006-7051.2014.04.003 XU Pengfei, CHU Huaibao, ZHANG Yingcai. Vibration numerical analysis of cooling tower blasting at high unloading slot incision[J]. Engineering Blasting, 2014, 20(4):11-14. doi: 10.3969/j.issn.1006-7051.2014.04.003
[16]	言志信, 彭宁波, 江平, 等.爆破振动安全标准探讨[J].煤炭学报, 2011, 36(8):1281-1284. http://d.old.wanfangdata.com.cn/Periodical/zdycj201105010 YAN Zhixin, PENG Ningbo, JIANG ping, et al. Research about blasting vibration safety criteria[J]. Journal of China Coal Society, 2011, 36(8):1281-1284. http://d.old.wanfangdata.com.cn/Periodical/zdycj201105010
[17]	周家汉.爆破拆除塌落振动速度计算公式的讨论[J].工程爆破, 2009, 15(1):1-4;40. doi: 10.3969/j.issn.1006-7051.2009.01.001 ZHOU Jiahan. Discussion on calculation formula of collapsing vibration caused by blasting demolition[J]. Engineering Blasting, 2009, 15(1):1-4;40. doi: 10.3969/j.issn.1006-7051.2009.01.001
[18]	蒋耀港, 沈兆武, 龚志刚.构筑物爆破拆除振动规律的研究[J].振动与冲击, 2012, 31(5):36-41. doi: 10.3969/j.issn.1000-3835.2012.05.008 JIANG Yaogang, SHEN Zhaowu, GONG Zhigang. Vibration law of structure blasting demolition[J]. Journal of Vibration and Shock, 2012, 31(5):36-41. doi: 10.3969/j.issn.1000-3835.2012.05.008
[19]	李守巨, 上官子昌, 张立国, 等.爆破拆除冷却塔倾倒条件的研究[J].辽宁工程技术大学学报(自然科学版), 1999(1):9-14. http://d.old.wanfangdata.com.cn/Conference/14968 LI Shouju, SHANGGUAN Zichang, ZHANG Liguo, et al. Study of collapsing condition for demolition of cooling tower[J]. Journal of Lianning Technical University (Natural Science), 1999(1):9-14. http://d.old.wanfangdata.com.cn/Conference/14968