混凝土结构烟囱爆破拆除的动力响应特征分析
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摘要
烟囱定向控制爆破倒塌过程中,爆破作用不仅使爆破位置的结构产生破坏,而且爆破产生的应力波对上部结构产生很大的作用,为了探讨其产生的原因,利用运动行波的运动方程,求解不同起爆条件下行波的运动规律,以及不同时刻爆炸应力波在烟囱中产生的应力作用行为和结构质点位移,发现了最大拉应力、结构质点位移可能出现的时刻和位置,并拟合绘制出了最大拉应力、质点位移的分布曲线。对高100 m混凝土结构烟囱的爆炸作用进行计算分析,认为烟囱定向控制爆破的起爆宜采用低段别、短延期时差的起爆网路。
In the process of the chimney orientation control blasting collapse,the blasting effect not only causes to the structure of the position demolished,moreover,the stress wave caused by blasting will produces major effect on the superstructure.In order to clarify the reason it produces,movement wave equation of motion was used to the movement wave rule under the different detonation condition,as well as in the different time detonation stress wave function behavior and the structure particle displacement produced in the chimney.The time and the position for the appearence of maximum stretch stress and structure particle displacement have be discovered,and the fitting distribution curve is drew up for maximum stretch stress,and particle displacement.Through the computation analysis of blasting effect on the 100m concrete structure chimney,it is thought the chimney orientation control blasting suitably to use the detonation network with low section and the short delay time difference.
In the process of the chimney orientation control blasting collapse,the blasting effect not only causes to the structure of the position demolished,moreover,the stress wave caused by blasting will produces major effect on the superstructure.In order to clarify the reason it produces,movement wave equation of motion was used to the movement wave rule under the different detonation condition,as well as in the different time detonation stress wave function behavior and the structure particle displacement produced in the chimney.The time and the position for the appearence of maximum stretch stress and structure particle displacement have be discovered,and the fitting distribution curve is drew up for maximum stretch stress,and particle displacement.Through the computation analysis of blasting effect on the 100m concrete structure chimney,it is thought the chimney orientation control blasting suitably to use the detonation network with low section and the short delay time difference.
引文
1房泽法,钱烨.高耸筒体建筑物爆破拆除设计中的运动学分析[J].武汉理工大学学报,2004,26(7):56~67
2郑炳旭,傅建秋,王永庆,等.150m高钢筋混凝土烟囱双向折叠爆破拆除[J].爆破,2004,10(3):34~38
3吴文武,韩强,李忱.结构的应力波[M].北京:科学出版社,2001
4娄建武,龙源,方向,等.基于反应谱值分析的爆破震动破坏作用评估研究[J].爆炸与冲击,2003,23(1):41~46
5张雪亮,黄树棠.爆破地震效应[M].北京:地震出版社,1981
6廖振鹏.工程波动理论导论[M].北京:科学出版社,2002
7李夕兵,凌同华.单段与多段微差爆破地震的反应谱特征分析[J].岩石力学与工程学报,2005,24(14):2109~2413
8凌同华,李夕兵.多段微差爆破振动信号频带能量分布特征的小波分析[J].岩石力学与工程学报,2005,24(14):1117~1122
9宋琦,陆鹏举,罗强.光面爆破空气垫层装药轴向不耦合系数理论研究[J].岩石力学与工程学报,2005,24(14):1048~7051
10中华人民共和国建设部.GB 50010-2001混凝土结构设计规范[S].北京:科学出版社,2002
2郑炳旭,傅建秋,王永庆,等.150m高钢筋混凝土烟囱双向折叠爆破拆除[J].爆破,2004,10(3):34~38
3吴文武,韩强,李忱.结构的应力波[M].北京:科学出版社,2001
4娄建武,龙源,方向,等.基于反应谱值分析的爆破震动破坏作用评估研究[J].爆炸与冲击,2003,23(1):41~46
5张雪亮,黄树棠.爆破地震效应[M].北京:地震出版社,1981
6廖振鹏.工程波动理论导论[M].北京:科学出版社,2002
7李夕兵,凌同华.单段与多段微差爆破地震的反应谱特征分析[J].岩石力学与工程学报,2005,24(14):2109~2413
8凌同华,李夕兵.多段微差爆破振动信号频带能量分布特征的小波分析[J].岩石力学与工程学报,2005,24(14):1117~1122
9宋琦,陆鹏举,罗强.光面爆破空气垫层装药轴向不耦合系数理论研究[J].岩石力学与工程学报,2005,24(14):1048~7051
10中华人民共和国建设部.GB 50010-2001混凝土结构设计规范[S].北京:科学出版社,2002
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