不同侧向起爆条件下隧洞结构动态响应及损伤分析  

Dynamic Response and Damage Analysis of Tunnel Structures under Different Lateral Blasting Conditions

作　　者：马文昌 黄锦林[2] 曹克磊 张建伟 赵瑜 MA Wenchang;HANG Jinlin;CAO Kelei;ZHANG Jianwei;ZHAO Yu(Civil Engineering and Transportation,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;Water Resources and Hydropower,North China University of Water Resources and Electric Power,Zhengzhou 450046,China)

机构地区：[1]华北水利水电大学土木与交通学院,郑州450045 [2]广东省水利水电科学研究院,广州510635 [3]华北水利水电大学水利学院,郑州450046

出　　处：《广东水利水电》2025年第3期1-9,共9页Guangdong Water Resources and Hydropower

基　　金：河南省高等学校重点科研项目(编号:24A570002);广东省水利电力勘测设计研究院有限公司委托项目(编号:WW2021622)。

摘　　要：为探究钢筋混凝土拱形隧洞在地下侧向爆炸荷载作用下的动力响应特性,采用SPH-FEM耦合算法建立了炸药、土体及钢筋混凝土拱形隧洞的三维模型,分析了侧向爆炸荷载下隧洞结构的动力响应和损伤。研究结果表明:爆炸波在土体中衰减与经验曲线一致,隧洞拱顶在冲击波叠加下出现应力集中;爆炸偏角增加导致竖向位移峰值减小并转向,拱顶变形由向上变为向下;损伤随爆炸偏角增大而加剧,从拱顶内表面向外扩展;爆炸侧位移和损伤程度高于远离爆源侧,且随偏角增大损伤程度降低。研究结果对钢筋混凝土拱形隧洞结构的安全性和抗爆设计具有重要理论意义和工程价值。In order to investigate the dynamic response characteristics of reinforced concrete arch tunnel under the action of underground lateral blast load,based on the SPH-FEM coupling algorithm,a three-dimensional numerical simulation model of explosives,soil and reinforced concrete tunnel is established,and the dynamic response of underground arch structure under the action of different lateral blast loads and different explosives amounts,the development process of damage and the classification of the grade are investigated.The results show that the attenuation law of the peak pressure of the blast wave in the soil with the proportional blast distance agrees well with the empirical curve.The superposition of incident and reflected waves produced a stress concentration zone on the vault surface.With the increase of explosion deflection angle(from 0°to 90°),the peak vertical displacement at D3 gradually decreases and changes in direction,and the deformation mode of the tunnel vault changes from upward deformation to downward deformation.Under 0°and 30°explosion deflection angle,the whole tunnel vault shows upward deformation;while under 60°and 90°explosion deflection angle,the whole tunnel vault shows downward deformation.The tunnel was seriously damaged under different explosion deflection angles,and the initial damage was concentrated on the inner surface of the vault,and the damage area was gradually close to the vault and enlarged with the increase of explosion deflection angle.The structural displacement and damage on the explosion side are significantly higher than those on the side away from the source,and the damage gradually decreases as the blast deflection angle increases from 0°to 90°.

关 键 词：地下拱形结构 侧顶爆 动态响应 抗爆性能 

分 类 号：U45[建筑科学—桥梁与隧道工程] O383[交通运输工程—道路与铁道工程]