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近距离爆炸荷载作用下砌体墙动态响应及破坏过程的数值模拟
引用本文:郭玉荣,张 楠.近距离爆炸荷载作用下砌体墙动态响应及破坏过程的数值模拟[J].湖南大学学报(自然科学版),2016,43(1):61-67.
作者姓名:郭玉荣  张 楠
作者单位:(湖南大学 土木工程学院,湖南 长沙 410082)
摘    要:为了探索砌体墙在近距离爆炸荷载作用下的破坏规律及碎块抛射规律,通过AUTODYN建立数值模型,得到在近距离手提箱包炸弹爆炸荷载作用下砌体墙的荷载分布规律及碎块抛射速度规律.结果表明:12墙、24墙、加固24墙在爆炸荷载作用下破坏规律是相似的.24墙及加固24墙相对12墙碎片抛射速度有较明显的降低.加固24墙由于聚氨酯加固膜的兜裹作用,最终会明显减小碎块的出墙面位移和速度.此外砌体墙各测点抛射速度与比例距离的关系曲线与超压峰值与比例距离关系比较相似.

关 键 词:砌体墙  动态响应  爆炸荷载  爆炸碎片  防爆

Numerical Simulation of Masonry Wall Dynamic Response and Failure Process under Close Range Blast Load
GUO Yu-rong,ZHANG Nan.Numerical Simulation of Masonry Wall Dynamic Response and Failure Process under Close Range Blast Load[J].Journal of Hunan University(Naturnal Science),2016,43(1):61-67.
Authors:GUO Yu-rong  ZHANG Nan
Institution:(College of Civil Engineering, Hunan Univ, Changsha , Hunan 410082 ,China)
Abstract:In order to explore the failure process and fragments ejection rule of blast case for masonry walls, the AUTODYN program was used to simulate the dynamic response of masonry walls under close range blast load. The distribution of blast pressure on masonry walls and debris ejection laws were obtained. The results show that the destruction rules of 120 mm, 240 mm masonry walls, and the strengthened 240 mm wall under close range blast load are similar. The debris ejecting speed of 240 mm wall and the strengthened 240 mm wall declines obviously when compared with 120 mm masonry wall. The debris ejecting speed of the strengthened 240 mm wall declines significantly on account of the consolidated film of PU. Moreover, the relationship between ejecting speed and scaled distance is similar to the relationship between scaled distance and peak overpressure.
Keywords:masonry walls  dynamic response  blast load  explosion fragments  explosion prevention
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