Glass in building — Explosion-resistant security glazing — Test and classification by shock-tube loading
建筑玻璃——防爆安全玻璃——用激波管载荷进行试验和分类
发布日期:
2007-06-21
ISO 16934:2007规定了防爆玻璃的冲击管试验方法和分类要求,包括由玻璃、塑料、玻璃包层塑料、夹层玻璃、玻璃/塑料嵌装材料和膜背玻璃制成的嵌装玻璃。ISO 16934:2007提供了确定嵌装玻璃和嵌装玻璃系统抗爆炸性和危险等级的结构化程序。ISO 16934:2007规定了通过在标准框架中对标准尺寸的试样进行试验来对此类安全玻璃板材进行分类的程序,以比较其相对防爆性和危险等级。
该程序和测试方法也可用于测试玻璃系统,但不能对其进行分类,其中填充板被纳入框架中,专门设计为合适尺寸的完整产品,以便安装到建筑物中。ISO 16934:2007采用了一种针对激波管设施中产生的爆炸波的试验和分类方法,以模拟约30 kg至2500 kg TNT的高爆炸性爆炸,爆炸距离约为35 m至50 m。这些分类大致代表了大型建筑物表面上这些等效威胁级别所经历的反射压力和冲击垂直于爆炸波路径的立面。
根据爆炸冲击波特征(以峰值反射压力、冲量、正相位持续时间和波形参数(衰减系数)表示)和评级标准(以嵌装玻璃损坏程度和碎片撞击危险程度表示)定义分类。分类和等级是根据嵌装玻璃的性能进行分配的,并且特定于进行试验的爆破特性。已接受空气喷砂分类和评级的嵌装玻璃适用于喷砂-
仅适用于具有类似特征的爆炸,且仅适用于安装在正确设计的框架内的情况。基于空气冲击阻力知识的设计降低了人身伤害的风险。
ISO 16934:2007 specifies a shock tube test method and classification requirements for explosion-pressure-resistant glazing, including glazing fabricated from glass, plastic, glass-clad plastics, laminated glass, glass/plastic glazing materials, and film-backed glass. ISO 16934:2007 provides a structured procedure to determine the blast resistance and the hazard rating of glazing and glazing systems. ISO 16934:2007 sets out procedures to classify such security glazing sheet materials by means of tests on specimens of a standard size in a standard frame for the purpose of comparing their relative explosion resistance and hazard rating.
The procedures and test method can also be used to test, but not classify, glazing systems where the sheet in-fill is incorporated into frames purposely designed as complete products of appropriate size for installation into buildings. ISO 16934:2007 applies a method of test and classifications against blast waves generated in a shock tube facility to simulate high-explosive detonations of approximately 30 kg to 2 500 kg TNT at distances from about 35 m to 50 m. The classifications approximately represent the reflected pressures and impulses that are experienced by these equivalent threat levels on the face of a large building facade positioned perpendicular to the path of the blast waves.
Classification is defined in terms of both blast shock-wave characteristics, expressed in terms of peak reflected pressure, impulse, positive phase duration and wave-form parameter (decay coefficient), and rating criteria, expressed in terms of degrees of glazing damage and fragment impact hazard. Classifications and ratings are assigned based upon the performance of the glazing and are specific to the blast characteristics under which the test has taken place. Glazing that has received an air-blast classification and rating is suitable for use in blast-resistant applications only for blasts of comparable characteristics and only if installed in a properly designed frame. Design based on knowledge of the air blast resistance reduces the risk of personal injury.