Notice of RetractionProtective properties of the supporting column in a subway station subjected to blast loading

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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Dynamic responses of the supporting column in a subway station, together with explosion-proof properties of the foam aluminum and the CFRP sheet respectively covering this structure, under the impact of an explosion occurring in neighboring area are numerically investigated in this paper. Based on the theories of hydrokinetics and explosive mechanics, the ANSYS/LS-DYNA software is used to establish a whole analytical model for the supporting column and its surroundings in a subway station. In this model, the ALE method and hydro-solid coupling arithmetic are employed to simulate the behavior of the dynamite and air and the interaction between air and the column; the complete restriction condition and non-reflecting boundary are chosen to deal with various reflective surfaces around and the outward propagation of blast waves, respectively; the Holmquist-Johnson-Cook model is introduced to evaluate the accumulated damage and deformation of the concrete column under large strain, high strain velocity and strong ambient pressure; the constitutive models of foam aluminum cover and CFRP sheet, along with their material parameters, are also determined. According to a great deal of example analysis, some response laws and damage characteristics of the supporting column lying in a subway station are disclosed in different distance between the explosion source and the column. From some comparisons of response results between the non-protected column and one covered by the foam aluminum material and between the former and o- e wrapped in the CFRP sheets, it is learned that the explosion-proof effects of these two measures are quite favorable, and some rational conclusions are drawn for the advantage and shortage of the two protective methods. This will provide important references for the explosion-proof practice of engineering structures.