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Structural Engineering and Mechanics
  Volume 63, Number 3, August10 2017, pages 347-359

Numerical analysis of reaction forces in blast resistant gates
Hasan Al-Rifaie and Wojciech Sumelka

    Blast resistant gates are required to be lightweight and able to mitigate extreme loading effect. This may be achieved through innovative design of a gate and its supporting frame. The first is well covered in literature while the latter is often overlooked. The design of supporting frame depends mainly on the boundary conditions and corresponding reaction forces. The later states the novelty and the aim of this paper, namely, the analysis of reaction forces in supporting structure of rectangular steel gates subjected to \"far-field explosions\". Flat steel plate was used as simplified gate structure, since the focus was on reaction forces rather than behaviour of gate itself. The analyses include both static and dynamic cases using analytical and numerical methods to emphasize the difference between both approaches, and provide some practical hints for engineers. The comprehensive study of reaction forces presented here, cover four different boundary conditions and three length to width ratios. Moreover, the effect of explosive charge and stand-off distance on reaction forces was also covered. The analyses presented can be used for a future design of a possible \"blast absorbing supporting frame\" which will increase the absorbing properties of the gate. This in return, may lead to lighter and more operational blast resistant gates.
Key Words
    blast resistant gates; reaction forces; ConWep
Hasan Al-Rifaie and Wojciech Sumelka: Poznan University of Technology, Institute of Structural Engineering, Piotrowo 5, 60-965 Poznan, Poland

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