摘要
为研究燃气泄爆荷载作用下双向砌体墙的抗爆能力及聚脲对墙体的加固性能,采用有限元动力分析软件LS-DYNA对未加固砌体墙和聚脲迎爆面、背爆面、双面加固的墙体,分别施加荷载峰值大小不同、作用时间均为100 ms的均布荷载,进行动态响应和抗爆性能分析。结果表明:未加固墙体在超压峰值为50 kPa的燃气爆炸荷载作用下即发生倒塌破坏,其抵抗100 ms爆炸冲击荷载的峰值介于40 kPa和50 kPa之间;相对于迎爆面加固双向墙体,背爆面加固的方式更加经济实用,在50 kPa荷载作用下,迎爆面加固的墙体发生开裂倒塌,而背爆面和双面加固墙体分别只有35.3 mm和33.6 mm的位移,且背部的聚脲涂层能有效防止碎片飞溅。
In order to study the anti-explosion performance of two-way masonry wall and the reinforcement performance of polyurea on wall under the action of gas explosion,the finite element dynamic analysis software LS-DYNA is used to analyzethe dynamic response andanti-explosion capability of the unreinforced masonry wall and the walls reinforced by spraying the polyurea on the front,back and double-side under uniform loads with different peak values and action time of 100 ms.The results show that:the unreinforced wall collapses under the gas explosion load with the peak overpressure of 50 kPa,and its peak resistance to 100 ms explosion impact load is between 40 kPa and 50 kPa;compared with the two-way wall reinforced by spraying the polyurea on its front,the backside reinforcement method is more economical and practical.The wall strengthened on the front cracks and collapses under 50 kPa load,while the displacements of the back reinforced wall and the double-sided reinforced wall are only 35.3 mm and 33.6 mm,respectively,and the polyurea spraying on the back can effectively prevent debris splashing.
作者
柳锦春
王钰颖
孙妮
LIU Jinchun;WANG Yuying;SUN Ni(College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2023年第S01期138-143,共6页
Acta Armamentarii
关键词
聚脲
砌体
爆炸荷载
有限元模拟
polyurea
masonry
explosion load
finite element simulation
作者简介
通信作者:柳锦春,邮箱:weise@163.com。
