广东水利水电Issue(3)：1-9,9.
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
摘要
Abstract
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Key words
underground arched structure/side top blast/dynamic response/anti-blast performance分类
交通运输引用本文复制引用
马文昌,黄锦林,曹克磊,张建伟,赵瑜..不同侧向起爆条件下隧洞结构动态响应及损伤分析[J].广东水利水电,2025,(3):1-9,9.基金项目
河南省高等学校重点科研项目(编号:24A570002) （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). （编号:WW2021622）
