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.
In order walls, the AUTODYN to explore the failure process and fragments ejection rule of blast case for masonry 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.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第1期61-67,共7页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50978096)
教育部新世纪优秀人才支持计划资助项目(NCET-08-0179)~~
关键词
砌体墙
动态响应
爆炸荷载
爆炸碎片
防爆
masonry walls
dynamic response
blast load
explosion fragments
explosion prevention
作者简介
郭玉荣（1970-），男，浙江青田人，湖南大学工学博士，教授 通讯联系人，E—mail：yurongguo@hnu．edu．cn
