基于等效峰值能量的建筑物爆破振动安全评价探讨
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摘要
爆破地震效应研究的中心话题就是如何对爆破地震的危害作出准确而又科学的评价。结合建筑物能量破坏机理,考虑爆破地震能量分布及建筑物动力响应特性,构造了基于"等效峰值能量"(EPE)的爆破地震安全评价方法。在相关研究的基础上,提出了EPE的爆破地震安全评价指标,并研究了EPE及等效速度的计算过程,探讨了不同爆源形式下的EPE简化计算方法,认为采用以等效速度表示的EPE指标来衡量爆破地震的危害程度是可行的,它较振速-频率相关的安全判据更能全面反映爆破地震危害的本质,并且具有很强的可操作性。
The most important issue for the researches on blast-induced seismic effects is to assess the damage induced by blasting vibration accurately and reasonably.Combining the energy damage mechanism and considering the distribution of blast-induced seismic energy and dynamic response characteristics of structures,a method for safety assessment on blasting vibration is proposed based on the equivalent peak energy(EPE).On the basis of relevant research results,the criterion based on EPE is put forward,and its computational procedure and equivalent velocity are studied.Furthermore,the simplified method of EPE for seismic induced by different types of blasting resources is studied.The research suggests that it is feasible for the equivalent velocity of EPE to evaluate the damage induced by blasting vibration.The criterion based on EPE reflects the essence of blasting vibration damage more comprehensively than the safety criterion considering the effect of frequency.And it can be realized easily.
The most important issue for the researches on blast-induced seismic effects is to assess the damage induced by blasting vibration accurately and reasonably.Combining the energy damage mechanism and considering the distribution of blast-induced seismic energy and dynamic response characteristics of structures,a method for safety assessment on blasting vibration is proposed based on the equivalent peak energy(EPE).On the basis of relevant research results,the criterion based on EPE is put forward,and its computational procedure and equivalent velocity are studied.Furthermore,the simplified method of EPE for seismic induced by different types of blasting resources is studied.The research suggests that it is feasible for the equivalent velocity of EPE to evaluate the damage induced by blasting vibration.The criterion based on EPE reflects the essence of blasting vibration damage more comprehensively than the safety criterion considering the effect of frequency.And it can be realized easily.
引文
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[9]陈超.建构筑物爆破振动响应及其安全评估研究[D].北京:北京科技大学,2005.(CHEN Chao.Study on response and safety evaluation of construction to blasting vibration[D].Beijing:Beijing University of Technology,2005.(in Chinese))
[2]王亚勇.关于设计反应谱、时程分析法和能量法的探讨[J].建筑结构学报,2000,21(1):21-28.(WANG Ya-yong.A review of seismic response spectra,time history analysis and energy method[J].Journal of Building Structures,2000,21(1):21-28.(in Chinese))
[3]李洪涛,杨兴国,舒大强,等.不同爆源形式的爆破地震能量分布特征.四川大学学报(工程科学版),2010,42(1):30-34.(LI Hong-tao,YANG Xing-guoo,SHU Da-qiang,et..Study on energy distribution characteristics of seismic waves induced by different forms of blasting resource[J].Journal of Sichuan University(Engineering Science Edition),2010,42(1):30-34.(in Chinese))
[4]李洪涛,舒大强,卢文波,等.建筑物对爆破振动中不同频率能量成分的响应特征[J].振动与冲击,2010,29(2):165-169.(LI Hong-tao,SHU Da-qiang,LU Wen-bo,et.Response characteristics of structures to the different energy components of blasting vibration[J].Journal of Vibration and Shock,2010,29(2):165-169.(in Chinese))
[5]HORI N,IWASAKI T,INOUE N.Damaging properties of ground motions and response behavior of structures based on momentary energy response[C]//Proc 12st WCEE.Auckland,New Zealand,2000.
[6]胡冗冗,王亚勇.地震动瞬时能量与结构最大位移反应关系研究[J].建筑结构学报,2000,21(1):71-76.(HU Rong-rong,WANG Ya-yong.A study on relation of instantaneous energy of earthquake strong motion and maximum displacement response of structures[J].Journal of Building Structures,2000,21(1):71-76.(in Chinese))
[7]李洪涛,卢文波,舒大强,等.基于功率谱的爆破地震能量分析方法[J].爆炸与冲击,2009,29(5):492-496.(LI Hong-tao,LU Wen-bo,SHU Da-qiang,et.An energy analysis method for blast-induced seismic based on power spectrum[J].Explosive and Shock Waves,2009,29(5):492-496.(in Chinese))
[8]国家标准抗震规范管理组.建筑抗震设计规范GB50011—2001统一培训教材[M].北京:中国建筑工业出版社,2002.(National stand and seismic code management group.GB50011—2001Unified training materials of code for seismic design of buildings[M].Beijing:China Building Industry Press,2002.(in Chinese))
[9]陈超.建构筑物爆破振动响应及其安全评估研究[D].北京:北京科技大学,2005.(CHEN Chao.Study on response and safety evaluation of construction to blasting vibration[D].Beijing:Beijing University of Technology,2005.(in Chinese))
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