建筑玻璃的爆炸动力响应及防爆距离

玻璃作为一种透明或半透明材料,广泛应用于现代建筑工程中,但其在爆炸冲击荷载作用下易于破碎,产生飞片伤人。文章应用弹性薄板振动理论,研究框支承玻璃在爆炸冲击荷载下的动力响应,得到玻璃的最大挠度与最大应力计算公式。基于爆炸冲击波传播特性和玻璃强度理论,提出了建筑玻璃爆炸冲击破坏准则,对不同类型和厚度的框支承玻璃在爆炸冲击波...

Dynamic response of architectural glass to explosion and safe extent research

As a kind of transparent or translucent material, architectural glass is widely used in the modern buildings, but it is easily broken under explosion loading, resulting in wounding fragments. Using the theory of vibration of elastic thin plate, the dynamic responses of frame-supported glass under blast loading were analyzed and the maximum deflection formula and the maximum stress formula of the glass panel were obtained in this paper. Based on the shock wave spread characteristics and the theory of the strength of glass, the damage criteria of architectural glazing subjected to explosion are presented. The safe extents of different types of frame-supported architectural glazing with different thickness under explosive shock wave were calculated and were comparatively analyzed with the results of the existing formulae. The results showed that the safe extents given by the existing formulae are too small to be unsafe for ordinary glass, yet too conservative for tempered glass, laminated glass and the float glass of thickness greater than 15mm. By regression analysis, the practical formulas for calculating safe extents of frame-supported glass under explosion are obtained, which are the same form with the existing formula and easy application.