摘要
为研究夹层玻璃在爆炸作用下的动力响应特征,对四边简支夹层玻璃面板进行了爆炸作用试验研究。试验按3个爆炸等级进行,研究了夹层玻璃面板在不同爆炸当量下的动力响应特征和破坏形态。试验表明:爆炸作用后冲击波的超压迅速升至峰值,并在数十毫秒内逐渐衰减,夹层玻璃的位移和应力随爆炸等级的增加而增大;在爆炸作用下,玻璃面板开始碎裂时裂纹在中心处呈环状,并由中心向四周均匀扩散,整个裂纹呈放射状展开,随着爆炸等级的增加,最终呈撕裂状破坏,钢化玻璃破碎为颗粒附着在PVB胶层上,没有发生飞溅。同时运用LS-DYNA有限元分析软件对试验模型进行了数值分析,分析所得玻璃面板的中心点最大位移与试验结果差别为38.7%,最大应力与试验结果的差别为20%,所得破坏模式与试验结果相吻合,表明数值模拟方法可靠。
The dynamic response characteristics and failure modes of laminated glass panel supported on four sides subjected to blast loading with three magnitudes were studied in this research. The results indicate the overpressure of shock wave increase quickly to peak and then decrease in milliseconds. With the increasing of magnitude of explosion, the displacement and stress of laminated glass increase and cracks grow at center ring and extend uniformly around. The crack is radioactive expansion. At last, the panel can be ripen under higher explosion load and glass can be attached to PVB. The fracture model of test was simulated with finite element software LS-DYNA. The deviation between the test and simulation for the maximum displacement and stress at center are The calculating results agree well with experiment results ,which shows the numerical 38.7% and 20% respectively simulation is reliable.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2013年第4期74-80,共7页
Journal of Building Structures
基金
国家自然科学基金项目(50978195)
