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Abstract

This study was aimed at investigating the blast resistance of a stiffened door structure. For this, a series of finite element transient analysis were performed to predict the dynamic response of blast resistant doors. Current results show that the stiffeners have sustained the majority of the explosive loadings. The effect of stiffener size on the stress state was rated in terms of the ratio of stiffener stress to plate stress, which was enhanced with the increase of web thickness of stiffener. Additional, the highest stresses were shown to occur at the transverse stiffeners near the hinged sides with a maximum stress above the dynamic yield strength, indicating the local yielding at these points. However, the rotational deformations of hinged support were within the deformation limit required for medium level of protection. In final, a static compressive experiment was carried out on prototype door structure to measure the static stiffness according to the test criteria given in TM5-1300. The numerically predicted results were demonstrated to agree well with the experimental results, showing a good performance of the door structure against blast loads was achieved.

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