地下箱形结构在爆炸地震波作用下动力响应的解析分析

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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。

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	刘扬1
	赵跃堂2
	罗昆升3
	赵普天4

关键词 ：箱形结构, 爆炸地震波, 动力响应, 解析分析

Abstract：Based on elastic wave theory, a diffraction model for the dynamic response of underground box structure under explosion seismic waves was built. By comparison with one-dimensional elastic-plastic wave theory model and LuoYang Soil Test results, the solutions were verified. Then, a host of influencing factors such as aspect ratios, the angle of incident wave, surrounding rock medium and detonation distances on the dynamic response characteristics of underground box structure were explored. The research results show that with the increase of incident angle, different parts of the lining show obvious non-uniform distribution characteristics, and the displacement of the left wall is greater than that of the roof and floor. With the increase of the aspect ratio, the peak displacement of the lining increases, and the axial force of the roof and side wall decreases. When the impedance ratio is greater than 0.17, the influence of surrounding rock characteristics on the lining dynamics is more obvious. The stress amplitude of the lining decreases as the detonation distance increases, and the greater the distance, the weaker the impact.

Key words： box structure explosion seismic wave dynamic response analytical solution

收稿日期: 2023-01-08 出版日期: 2023-11-15

引用本文:

刘扬1，赵跃堂2，罗昆升3，赵普天4. 地下箱形结构在爆炸地震波作用下动力响应的解析分析[J]. 振动与冲击, 2023, 42(21): 306-315.
LIU Yang1, ZHAO Yuetang2, LUO Kunsheng3, ZHAO Putian4. Analytical solution of dynamic response of underground box structure under explosion seismic wave. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(21): 306-315.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I21/306

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