Experimental investigation of rupture and dispersion characteristics of float glass subjected to vented explosion loads of methane-air mixtures

摘要

The high-speed flying debris from architectural glass in a gas explosion poses a great security threat to personnel and building safety. In this paper, the damage characteristics of float glass under gas explosion venting loads and the distribution of glass fragments are studied through field tests. The results show that the rupture and dispersion of float glass are affected by the glass thickness and type and the methane concentration. Float glass exhibits spider-web cracking, and the fragments are sharp. The main shape of the debris dispersion front is either rectangular or "drum" shaped. The initial ejection speed of the shards is affected mainly by the glass thickness. The flying debris undergoes different acceleration and deceleration processes, and two acceleration peaks occur for a methane concentration of 9.5%. The glass shards are concentrated in two main areas of the collection site, and a theoretical model of glass scattering is established based on the test results. It can provide basic experimental data for research into gas explosions and act as a reference for the anti-explosion design of building structures.