地下箱形结构在爆炸地震波作用下动力响应的解析分析  

Analytical solution of dynamic response of underground box structure under explosion seismic wave

作　　者：刘扬 赵跃堂 罗昆升 赵普天[4] LIU Yang;ZHAO Yuetang;LUO Kunsheng;ZHAO Putian(School of Civil Engineering,Xuchang College,Xuchang 461000,China;State Key Laboratory of Disaster Prevention and Mitigation of Explosion and Impact,Army Engineering University of PLA,Nanjing 210007,China;The Institute of the Rocket Force,Beijing 100094,China;College of Urban and Environmental Studies,Xuchang College,Xuchang 461000,China)

机构地区：[1]许昌学院土木工程学院,河南许昌461000 [2]陆军工程大学爆炸冲击防灾减灾国家重点实验室,南京210007 [3]火箭军研究院,北京100094 [4]许昌学院城市与环境学院,河南许昌461000

出　　处：《振动与冲击》2023年第21期306-315,共10页Journal of Vibration and Shock

基　　金：河南省高等学校重点项目(23B560010)。

摘　　要：基于平面弹性波动理论,建立了爆炸地震波作用下地下箱形结构动力反应的衍射模型,并与一维集中参数模型、一维弹塑性波动理论模型以及洛阳土中试验结果进行对比,验证了模型的正确性。研究了入射波角度、衬砌宽高比、围岩介质和爆炸距离的波动特性,结果表明:随着入射角度的增加,衬砌不同部位呈现明显的非一致分布特性,左侧墙位移大于顶板和底板;随着宽高比的增加,衬砌位移峰值增大,顶板和侧墙轴力减小;当阻抗比大于0.17时,围岩特性对衬砌动力的影响更加明显;衬砌各位置的应力幅值随爆炸距离增加而减小,距离越大,影响越弱。Here,based on the plane elastic wave theory,a diffraction model of dynamic response of underground box structure under explosive seismic wave was established.Compared with 1D lumped parameter model,1D elastic-plastic wave theory model and test results in Luoyang soil,the correctness of the model was verified.Effects of incident wave angle,lining aspect ratio,surrounding rock medium and explosion distance on the dynamic response were studied.The results showed that with increase in incident angle,displacements of lining different positions have obvious non-uniform distribution characteristics,displacements of left side wall are larger than those of top and bottom plates;with increase in aspect ratios,peak displacements of lining increase,and axial forces of top plate and side walls decrease;when the impedance ratio is larger than 0.17,effects of surrounding rock characteristics on lining are more obvious;stress amplitude at each position of lining decreases with increase in explosion distance,the larger the distance,the weaker the impact.

关 键 词：箱形结构 爆炸地震波 动力响应 解析分析 

分 类 号：U45[建筑科学—桥梁与隧道工程]