Behavior of beam-column bolted end-plate connections under blast

Considering passive defense in construction and rehabilitation of military and residential structures is a proper method for blast-induced damage mitigation. In this paper، the behavior of end plate bolted connections under blast is studied. To assure the accuracy of finite element models، verification is carried out using the results of an experimental test.. A 5-story structure is designed according to national steel structures code using ETABS and one of the first storey connections is studied under blast load using nonlinear dynamic analysis in ABAQUS considering the effects of high strain rates. The results show that the beam experiences significant torsion. Moreover، the critical area in moment connection is the area adjacent to lower bolt holes as well as the area between end plate and lower beam flange. It is also observed that the use of small bolts in higher number provides more desirable response in blast loading.