Anti-blast capabilities of the gateway of a grade-5 civil defense structure closed up by bonded steel plates

The study aimed to explore the gateway design plan for civil defense structure of a typical garage closed up by bonded steel plates. According to this design plan, an experimental model for the steel plate-to-concrete bonded joint structure was proposed to perform an on-site test in an imitated nuclear blast pressure container. The displacement-time curves and the strain-time curves along the vertical supporting steel plates were obtained, which are in agreement with the numerical results by the finite element method. And the bond stresses on the interfaces between the steel plates and the concrete were achieved from the strain distributions along the vertical supporting steel plates. The study examined the supporting reliability of the contact surface between the concrete wall and the steel plate, analyzed the bond-stress distribution along the vertical supporting steel plate subjected to the grade-5 civil defense blast shock wave. The researched results provide a reference to calculate bond stresses between concrete walls and steel plates.