建筑玻璃板在爆炸荷载下的破碎性能(Ⅱ)——试验验证

Fragmentation performance of glass plate under blast loading——Part Ⅱ: experimental verification

与本文相关的另一篇系列论文对建筑玻璃板在爆炸荷载下的玻璃碎片飞溅进行了理论推导,最终得到了用于评估玻璃碎片危害范围的简化模型。为了验证该理论模型的准确性,进行8mm厚普通平板玻璃的静力材性试验及其在600g、800g、1200g和1600gTNT炸药下的现场野外爆炸试验。通过压力传感器采集爆炸冲击波的压力时程;利用高速相机对玻璃碎片的破碎与飞溅过程进行抓拍,得到不同炸药当量下玻璃碎片的抛射速度;对各个荷载工况下玻璃板破碎后散落在房间内的玻璃碎片进行人工收集,得到玻璃碎片的距离分布。通过试验数据与理论模型的对比分析,得到理论模型中的调整系数,最后通过试验中玻璃碎片最大飞溅距离与理论模型得到的飞溅距离的对比,验证了用于玻璃碎片危害范围评估的理论模型的准确性。

In the companion paper, the theoretical formulas of projection velocity of splashing glass fragments were derived, and simplified analysis model the hazard range assessment of glass fragments was obtained, In order to verify the accuracy of the theoretical model, static material laboratory tests and of architectural 8mm-thick glass panel with and of 600g, 800g, 1200g and 1600g TNT in-situ explosive tests were carried out respectively, The time history curves of explosion shock wave were collected by pressure sensor. The crushing process of glass panel and the projection velocities of glass fragments were also recorded by high-speed camera, and the relationship of the amount of explosives and fragments splashing speed was established. The glass fragments scattered in the room were collected, and the flight distance and distribution of fragments were measured. By the comparative analysis between the test data and theoretical model, adjustment factor used in the theoretical model is obtained. Finally, the accuracy of theoretical model for assessing the hazard range of glass fragments is verified by comparing the test results with the theoretical ones.