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由于爆炸过程的不稳定和爆炸测试的不确定性,由已有的预测爆炸荷载的经验公式和图表所得到的爆炸荷载存在较大差异,不便于工程应用。在查阅了各国抗爆规范和大量文献,搜集了大量已有的经验公式和图表的基础上,分析和计算了不同比例距离下的反射超压和假想比例持续时间。运用统计学方法求得各比例距离下具有90%保证率的反射超压和假想比例持续时间,拟合得到了爆炸荷载反射超压及假想比例持续时间与比例距离的关系曲线,可用于确定建筑结构抗爆设计的爆炸荷载取值。拟合公式确定的爆炸荷载参数稍大于人防规范和UFC规范中的规定取值,偏于安全,较为合理。
Due to the instability of the explosion process and the uncertainty of the explosion test, there is a big difference between the explosion load obtained from the empirical formula of the predicted explosion load and the chart, which is not convenient for engineering application. After consulting the antiknock norms and numerous literatures in various countries and collecting a large number of existing empirical formulas and charts, the duration of the reflected overpressure and the imaginary proportion under different distances are analyzed and calculated. Using the statistical method to obtain the reflection overpressure and the imaginary proportion duration with the 90% guarantee ratio for each proportional distance, the curve of the explosion load overpressure and the imaginary proportion of the duration and the proportional distance is fitted and can be used to determine the building Structure antiknock design of the explosive load value. Fitting formula to determine the explosion load parameters slightly larger than the provisions of civil air defense norms and UFC norms, biased in safety, more reasonable.