框架结构楼房爆破震动响应的数值模拟Numerical Simulation of Blasting Vibration Response of Structure Building Framework
陈永麟,马建军,李玉能,王立锋,田水龙
摘要(Abstract)：
为研究框架结构在爆破震动下的震动响应特性,利用ANSYS/LS-DYNA显示动力分析软件,对某框架结构进行了模态分析与动力响应分析。得到了该建筑结构的自振频率小于10 Hz,低频爆破地震波是引起结构振动、变形的主因;对结构受距离20 m基坑爆破的振动影响进行了模拟,计算所得的距爆源最近点震速和实测震速基本吻合;分析了建筑结构不同楼层的爆破振动规律,表明建筑结构的垂直向速度响应大于水平向速度,20层的高层建筑结构随着楼层高度增加,在1~6楼出现了振动速度局部放大现象。裙楼楼顶(距爆源最远处)出现整个结构最大速度峰值。在城市复杂环境进行爆破施工时,对周围建筑结构的安全监测,不能只对距爆源最近地表进行振动监测,须注意高层建筑结构内部的局部放大效应。
关键词(KeyWords)： 框架结构;城市爆破;爆破振动;ANSYS/LS-DYNA;安全监测
基金项目(Foundation): 国家自然科学基金项目(51174147)
作者(Author): 陈永麟,马建军,李玉能,王立锋,田水龙
参考文献(References)：
- [1]祝文化,明锋,李新平.爆破地震波作用下框架结构的高程响应分析[J].煤炭学报,2011(S2):411-415.[1]ZHU Wen-hua,MING Feng,LI Xin-ping.Elevate effect analysis of frame structure response under blasting seismic wave[J].Journal of China Coal Society,2011(S2):411-415.(in Chinese)
- [2]高富强,张光雄,杨军.爆破地震荷载作用下建筑结构的动力响应分析[J].爆破,2015,32(1):5-10.[2]GAO Fu-qiang,ZHANG Guang-xiong,YANG Jun.Dynamic response analysis of building structure under blasting seismic loads[J].Blasting,2015,32(1):5-10.(in Chinese)
- [3]曹孝君,张继春,吕和林.频率对爆破地震作用下结构的动力响应的影响研究[J].爆破,2006,23(2):14-19.[3]CAO Xiao-jun,ZHANG Ji-chun,LU He-lin.Effect of frequency on the dynamic response of structure resulting from blasting seism[J].Blasting,2006,23(2):14-19.(in Chinese)
- [4]GB50011—2011建筑抗震设计规范[S].
- [5]CHEN S,ZHAO J,ZHOU Y.UDEC modeling of a field explosion test[J].Fragblast,2000,4(2):149-163.
- [6]HENRYCH J.The dynamics of explosion and its use[M].New York:Elsevier Scientific Publishing Company,1979.
- [7]雷卫东,李宏军,柳纯.爆破荷载应力波在无限弹性介质中传播的特征线法解[J].岩土力学,2016,37(10):2979-2983.[7]LEI Wei-dong,LI Hong-jun,LIU Chun.Solution of blasting-induced stress wave propagation in an infinite elastic medium based on characteristics method[J].Rock and Soil Mechanics,2016,37(10):2979-2983.(in Chinese)
- [8]李启月,李易,韦佳瑞,等.中远场振动有限元分析中微差爆破荷载的等效施加方法研究[J].矿冶工程,2016,36(2):1-5.[8]LI Qi-yue,LI Yi,WEI Jia-rui,et al.Equivalent load of millisecond blasting assumed in the finite element analysis for blasting vibration in middle and far field[J].Mining and Metallurgical Engn-eering,2016,36(2):1-5.(in Chinese)
- [9]石洪超,邹新宽,张继春,等.爆破动荷载作用下边坡锚杆加固效果分析[J].爆破,2016,33(2):6-11.[9]SHI Hong-chao,ZOU Xin-kuan,ZHANG Ji-chun,et al.Analysis of reinforcement effect of slope bolt under blasting dynamic load[J].Blasting,2016,33(2):6-11.(in Chinese)
- [10]吴浩然,刘晓青,宁昕扬.爆破地震波引起远场拱坝振动的数值模拟[J].三峡大学学报(自然科学版),2016,38(5):14-18.[10]WU Hao-ran,LIU Xiao-qing,Ning Xin-yang.Numerical simulation of arch dam vibration in far-filed induced by blasting seismic waves[J].Journal of China Three Gorges Universal(Natural Sciences),2016,38(5):14-18.(in Chinese)
- [11]S G Chen,J Zhao,Y X Zhou.UDEC modeling of a field explosion test[J].Fragblast,2000,4(2):149-163.
- [12]JOSEF Henrych.The dynamics of explosion and its use[M].New York:Elsevier Scientific Publishing Company,1979:218.