基于反应谱分析的建(构)筑物爆破振动响应安全评估方法研究
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摘要
利用大量爆破振动实际监测数据,对爆破振动速度反应谱谱面积SR与爆破地震波信号各特征量进行了关联分析,研究了SR对建筑结构振动损伤的影响和关联。研究发现SR值能较全面地反映爆破振动的综合作用效果,以及结构动力特性对结构振动破坏的影响。根据研究结果,提出了用SR作为爆破振动安全评估特征值的爆破地震效应评估新方法。132组爆破振动数据的计算与分析表明,SR>5.5时爆破地震波将对一般民房结构产生破坏的概率显著增加,可将[SR2]≤5.5作为二类建(构)筑物爆破振动破坏安全判据标准的补充。在此研究的基础上,通过引入建(构)筑物爆破振动反应谱安全系数Prs的概念,初步建立了以SR为特征值,考虑爆破振动综合作用效应和结构振动特性的爆破振动安全统一判据。
Through monitoring data of blasting vibration,relations between velocity response spectrum area of the blasting vibration(SR) and characteristic quantities of the blasting earthquake wave signal were analyzed.The influence of SR to vibration damage of the building structure and relations between them were studied.The results show that SR can comprehensively reflect the general effect of the blasting vibration and influences of structural dynamic characteristics to structural vibration damage.Then,a new method of the blasting seismic effect assessment was put forward that the SR was used as the blasting vibration safety assessment eigenvalue.The computation and the analysis of 132 groups blasting vibration data indicate that damage probability of general civil houses caused by blasting vibration increases significantly.≤5.5 can be used as a supplementary of blasting vibration damage safety criterion of the type II building.On this basis,the unified security criterion of blasting vibration was initially founded through introducing blasting vibration response spectrum safety factor of the building(Prs).In the unified security criterion,SR was as the blasting safety assessment eigenvalue and comprehensive effect of blasting vibration and vibration characteristics of the building structure were considered.
Through monitoring data of blasting vibration,relations between velocity response spectrum area of the blasting vibration(SR) and characteristic quantities of the blasting earthquake wave signal were analyzed.The influence of SR to vibration damage of the building structure and relations between them were studied.The results show that SR can comprehensively reflect the general effect of the blasting vibration and influences of structural dynamic characteristics to structural vibration damage.Then,a new method of the blasting seismic effect assessment was put forward that the SR was used as the blasting vibration safety assessment eigenvalue.The computation and the analysis of 132 groups blasting vibration data indicate that damage probability of general civil houses caused by blasting vibration increases significantly.≤5.5 can be used as a supplementary of blasting vibration damage safety criterion of the type II building.On this basis,the unified security criterion of blasting vibration was initially founded through introducing blasting vibration response spectrum safety factor of the building(Prs).In the unified security criterion,SR was as the blasting safety assessment eigenvalue and comprehensive effect of blasting vibration and vibration characteristics of the building structure were considered.
引文
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[2]孟吉复,惠鸿斌.爆破测试技术(第1版)[M].北京:冶金工业出版社,1992.
[3]阳生权,廖先葵,刘宝琛.爆破地震安全判据的缺陷与改进[J].爆炸与冲击,2001,21(3):223-228.
[4]唐春海,于亚伦,王建宙.爆破震动安全判据的初步探讨[J].有色金属,2001,53(1):1-4.
[5]凌同华,李夕兵,王桂尧.单段爆破震动的动态响应分析[J].中南大学学报(自然科学版).2007,38(3):551-554.
[6]张志呈.爆破地震参量与振动持续时间[J].四川冶金,2002,(3):1-4.
[7]张志呈.浅谈评价爆破地震效应的方法和标准[J].爆破器材,1998,27(3):32-35.
[8]Walker S,Yong P A,Davey P M.Development of Re-sponse Spectra Techniques for Prediction of StructuralDamage from Open-pit Blasting Vibrations[J].MiningIndustry,1982,91(4):A55-A62.
[9]Dowding C H,Stagg MS,Siskind D E.Effects of Re-peated Blasting on a Wood Frame House[R].U.S.Bu-reau of Mines,RI8896,1984.
[10]Dowding C H,Siskind D E,Stagg MS.Response andDamage Produced by Ground Vibration from Blasting[R].United States Bureau of Mines,RI 8507,1980.
[11]王德胜.爆破振动安全标准的研究[J].有色金属,1995(3):43-48.
[12]朱传云,卢文波,董振华.岩质边坡爆破振动安全判据综述[J].爆破,1997,14(4):15-17.
[13]霍永基,王湘均,费骥鸣.爆破地震效应及安全评定方法[A].土岩爆破文集(第二辑)[C].北京:冶金工业出版社,1985,184-187.
[14]叶海旺,房泽法,彭志刚.爆破地震对结构的影响[J].爆破,2000,17(1):86-91.
[15]廖大学,宋光明,史秀志.爆破地震振动危害及评价方法的探讨[J].世界采矿快报,1999,15(7):41-46.
[16]张亚宾,陈超,李占金.浅孔露天爆破的反应谱特征分析[J].河北理工大学学报,2006(2):16-21.
[17]中华人民共和国国家质量监督检验检疫总局.爆破安全规程(GB6722-2003)[S].北京:中国标准出版社,2003.
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