Equivalent single degree of freedom model of SRC columns under blast loading

The analysis of structures subjected to loads due to explostion is often treated by means of equivalent single degree of freedom model(ESDOFM).The most important parameters in the ESDOFM are the equivalent elastic displacement, equivalent limited displacement and equivalent yield strength.In the present paper,the equivalent elastic displacement and limited displacement of steel-reinforced-concrete(SRC)columns subjected to blast loading are evaluated based on the results of numerical simulation studies using LS-DYNA.A method to compute the equivalent yield strength of SRC columns is proposed,and the ESDOFM of SRC columns subjected to blast loading is then established.Finally,8 SRC columns are analyzed using the ESDOFM and LS-DYNA software respectively. It is found that the ESDOFM proposed is suitable for the design analysis of SRC columns under blast loading.