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| 爆炸波与破片联合作用下砌体墙 破坏效应研究 |
| Study on the Damage Effects of Masonry Walls Subjected to Combined Blast-Wave and Fragment Loading |
| 投稿时间：2026-07-17 修订日期：2026-08-03 |
| DOI： |
| 中文关键词: 砌体墙 爆炸波 破片 破坏模式 数值模拟 |
| English Keywords:masonry wall blast wave fragments failure mode numerical simulation |
| 基金项目:国家自然科学基金资助项目（52578544）；目标易损性评估全国重点实验室开放基金项目（YSX2024KFYS002） |
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| 中文摘要: |
| 战斗部爆炸产生的爆炸波与高速破片会对砌体墙造成整体变形和局部破坏等复合损伤，其破坏效应具有显著的时序性和耦合性。为揭示爆炸波与破片联合作用下砌体墙的损伤演化规律及破坏模式转化机制，开展了不同爆距破片战斗部作用的砌体墙毁伤试验，获得墙体损伤规律和破坏模式。通过LS-DYNA建立了破片战斗部—砌体墙耦合数值模型，并基于试验结果进行了验证，进一步分析了不同爆距下，爆炸波与破片到达时序对砌体墙破坏差异以及墙体破坏模式转化规律。结果表明：爆炸波与破片之间存在明显的时序差异，随爆距增大，其到达顺序由爆炸波先到达，逐渐转变为两者同步到达以及破片先到达；砌体墙破坏模式由爆炸波主导的整体失效破坏，逐步转变为联合荷载主导的贯穿破坏以及破片主导的局部贯穿破坏。爆炸波与破片的时序耦合会产生显著的协同放大效应，使联合荷载作用下墙体的动态响应和损伤程度高于两种荷载单独作用的简单叠加。 |
| English Summary: |
| Blast waves and high-velocity fragments generated by warhead detonation cause combined damage to masonry walls, including global deformation and local failure, with evident temporal and coupling effects. To investigate the damage evolution and failure mode transition of masonry walls under combined blast wave and fragment loading, damage tests of masonry walls subjected to fragment warheads at different stand-off distances were conducted. A coupled fragment warhead–masonry wall model was established using LS-DYNA and validated against experimental results. The effects of blast wave–fragment arrival sequence on wall damage and failure mode transition were further analyzed. The results show that the arrival sequence changes from blast-wave-first to simultaneous arrival and finally to fragment-first with increasing stand-off distance. The failure mode transitions from blast-wave-dominated global failure to combined-loading-induced perforation failure and finally to fragment-dominated local perforation failure. The temporal coupling between blast waves and fragments produces a significant synergistic amplification effect, resulting in more severe dynamic responses and damage than the superposition of individual loading effects. |
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