曲墙式土体隧道围岩结构的爆炸动力响应
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摘要
为了找出爆炸动力作用下的力学规律、隧道围岩结构的薄弱部位和最容易失效的单元,通过建立土体隧道动力分析有限元整体模型,综合考虑非线性动力方程的求解方法、材料模型的选取、爆炸冲击波的输入方法和收敛性及流固耦合效应的实现因素,利用显式动力有限元程序ANSYS/LS-DYNA进行数值模拟,探讨了土体隧道围岩结构在爆炸作用下不同单元的时间历程曲线,分析了爆炸作用下土体隧道围岩结构的动力响应问题,从而为隧道的抗爆设防设计提供参考依据。
It's significant to obtain the mechanic laws and weak parts of soil tunnel,and the most likely failure elements under the explosion shock action to prevent terrorist attacks which can cause tremendous loss of human life and property and collapse and damage of many buildings and construction.Therefore,numerical simulation for soil tunnels is carried through the explicit dynamic finite element program ANSYS/LS-DYNA,and the time-history curves are discussed about the soil surrounding tunnel under explosion action.The dynamic response of soil tunnel under the explosion action is analyzed by establishing finite element integral model of soil tunnel dynamic analysis and comprehensively considering the solving method of nonlinear dynamic equation,the selection of different material models,the method of explosion shock wave input and the convergence and realizing factors of fluid-solid coupling effect.Thus,a reference for antiknock design of tunnels is presented.
It's significant to obtain the mechanic laws and weak parts of soil tunnel,and the most likely failure elements under the explosion shock action to prevent terrorist attacks which can cause tremendous loss of human life and property and collapse and damage of many buildings and construction.Therefore,numerical simulation for soil tunnels is carried through the explicit dynamic finite element program ANSYS/LS-DYNA,and the time-history curves are discussed about the soil surrounding tunnel under explosion action.The dynamic response of soil tunnel under the explosion action is analyzed by establishing finite element integral model of soil tunnel dynamic analysis and comprehensively considering the solving method of nonlinear dynamic equation,the selection of different material models,the method of explosion shock wave input and the convergence and realizing factors of fluid-solid coupling effect.Thus,a reference for antiknock design of tunnels is presented.
引文
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[2]李忠献,田力.地下爆炸波作用下基底滑移隔震建筑-土-隧道相互作用的动力分析[J].工程力学,2004,21(6):56-64.LI Zhongxian;TIAN Li.Dynamic interaction analysisof sliding base-isolated building-soil-tunnel subjected tounderground explosion wave[J].EngineeringMechanics,2004,21(6):56-64.
[3]李忠献,田力.地下爆炸波作用下基底滑移隔震大跨结构的动力响应分析[J].计算力学学报,2005,22(4):457-564.LI Zhongxian,TIAN Li.Dynamic response analysis forsliding base-isolated long-span structures subjected tounderground explosion waves[J].Chinese Journal ofComputational Mechanics,2005,22(4):457-564.
[4]罗昆升,王勇,赵跃堂,等.地铁区间隧道在地面爆炸荷载作用下的数值模拟[J].解放军理工大学学报:自然科学版,2007,8(6):674-679.LUO Kunsheng,WANG Yong,ZHAO Yuetang,et al.Numerical simulation of section subway tunnelunder surface explosion[J].Journal of PLA Universityof Science and Technology:Natural Science Edition,2007,8(6):674-679.
[5]国胜兵,王明洋,赵跃堂,等.爆炸地震波作用下地下结构动力响应数值分析[J].世界地震工程,2004,20(4):137-142.GUO Shengbing,WANG Mingyang,ZHAO Yuetang,et al.Dynamic numerical analysis of undergroundstructures under action of explosion seismic wave[J].World Earthquake Engineering,2004,20(4):137-142.
[6]Daniel J L,Krauthammer T.Assessment of numericalsimulation capabilities for medium-structure interactionsystems under explosive loads[J].Computers andStructures,1997,63(5):875-887.
[7]杜修力,廖维张,田志敏,等.炸药爆炸作用下地下结构的动力响应分析[J].爆炸与冲击,2006,26(5):474-480.DU Xiuli,LIAO Weizhang,TIAN Zhimin,et al.Dynamic response analysis of underground structuresunder explosion-induced loads[J].Explosion andShock Waves,2006,26(5):474-480.
[8]田力,李忠献,郝洪.双线隧道中单侧隧道内爆炸引起地面建筑的动力响应及滑移隔震研究[J].工程力学,2008,25(8):133-138.TIAN Li,LI Zhongxian,HAO Hong.Dynamicresponses and sliding isolation of buildings on theground subjected to explosion inside one of two-waytunnels[J].Engineering Mechanics,2008,25(8):133-138.
[9]刘建民,陈文涛.爆炸荷载下埋地管道动力响应分析研究[J].工程爆破,2008.14(2):20-24.LIU Jianmin,CHEN Wentao.Dynamic response studyof buried pipeline subjected to blast loads[J].Engineering Blasting,2008.14(2):20-24.
[10]Syrunin M A,Fedorenko A G,Ivanov A G.Dynamicstrength of fiber glass shell[J].Journal de PhysiqueⅣ,1997,7(3):517-521.
[11]申祖武,龚敏,王天运,等.爆炸冲击波作用下建筑结构动力特性的数值模拟与试验[J].武汉理工大学学报,2009,31(2):104-106.SHEN Zuwu,GONG Min,WANG Tianyun,et al.Numerical simulation and experimental study ondynamic response of the buildings structure under blastshock wave[J].Journal of Wuhan University ofTechnology,2009,31(2):104-106.
[13]凌贤长,胡庆立,欧进萍,等.土-结爆炸冲击相互作用模爆试验相似设计方法[J].岩土力学,2004,25(8):1249-1253.LING Xianchang,HU Qingli,OU Jinping,et al.A scalemodeling method of simulation explosion test of soil-structure impactive interaction due to exploding[J].Rockand Soil Mechanics,2004,25(8):1249-1253.
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