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采用空气隔层的成层式结构是地下工程抗常规武器破坏效应设计中新近采用的一种防护结构形式。但是对于如何确定空气隔层情况下结构上的常规武器爆炸设计荷载尚没有明确的计算方法。为了给工程设计提供较为可靠的依据,本文以某实际工程为例,采用对比法和有限元数值模拟法对工程顶板上的爆炸荷载进行了计算。对计算结果进行对比分析后提出:在实际工程设计中,通过控制空气隔层的厚度可以有效降低爆炸荷载的破坏作用,使常规武器爆炸荷载成为工程设计的非控制荷载,为合理简化设计过程提供了新的思路。
Layered structures with air barriers are a form of protection recently adopted in the design of destructive underground structures for conventional weapons. However, there is no clear calculation method for how to determine the design load of conventional structural explosives in the air barrier case. In order to provide a more reliable basis for engineering design, this paper takes an actual project as an example, and calculates the explosion load on the roof of the project by using contrast method and finite element numerical simulation method. Comparing the calculation results, it is put forward that in the actual engineering design, by controlling the thickness of air barrier layer, the destructive effect of explosion load can be effectively reduced, and the explosion load of conventional weapon becomes uncontrolled load of engineering design, which provides a reasonable and simplified design process A new way of thinking.