直坑道内防护门上的爆炸冲击波荷载

发布时间：2018-05-17 05:20

本文选题：坑道 + 冲击波荷载　；参考：《爆炸与冲击》2017年06期

【摘要】：为可靠开展抗爆结构设计与评估,基于理论计算与数值分析对直坑道内爆炸冲击波荷载的计算问题进行了研究。定量对比分析了现有不同方法计算结果的差异,基于结构响应对不同方法进行了评价,并结合模型实验对近距离爆炸情况下直坑道内防护门上的设计荷载取值问题进行了研究。结果表明,在进行荷载简化时有必要考虑荷载形式与结构响应的耦合,而现有坑道内爆炸冲击波荷载的简化计算方法普遍没有考虑结构动态特性影响,且相互之间存在很大差异,严重影响设计或评估工作的可靠性;近距离爆炸情况下,取门中线上距门边1/4宽度处的压力或门上平均压力作为坑道内防护门上的设计荷载,在比较宽的结构频率范围内是合理的。研究结果可为坑道内结构的防护设计提供参考。
[Abstract]:In order to design and evaluate explosion-resistant structure reliably, the calculation of blast shock wave load in a straight tunnel is studied based on theoretical calculation and numerical analysis. The difference of calculation results between different methods is compared and analyzed quantitatively. The different methods are evaluated based on the structural response. The design load selection problem on the protection door in a straight tunnel under the condition of close distance explosion is studied in combination with the model experiment. The results show that it is necessary to consider the coupling of load form and structural response in load simplification, but the existing simplified calculation methods of blast wave load in tunnel do not consider the influence of structure dynamic characteristics. The reliability of the design or evaluation work is seriously affected by the great differences between them. In the case of close range explosion, the pressure on the middle line of the door or the average pressure on the door at the width of 1 / 4 from the side of the door is taken as the design load of the protective door in the tunnel. It is reasonable in a wide range of structural frequencies. The results can provide reference for the protection design of tunnel interior structure.
【作者单位】：解放军理工大学国防工程学院;中国人民解放军66469部队;
【基金】：国家自然科学基金创新研究群体科学基金项目(51321064)
【分类号】：O383

【相似文献】