Transverse blast loading of hollow beams with square cross-sections

摘要: Abstract A model of deformation a metal hollow section beam under uniform blast loading is developed in order to reveal the characteristic features and energy absorption beams such loading. It established that as typical structural component distinguishes itself from its solid counterpart with two response. First, considerably larger kinetic generated impulsive load imparted on upper flange having significantly lower mass than member. Second, considerable proportion can be absorbed by local collapse section. two-phase analytical proposed. In first phase, thin-walled cross-section determined using an bound approach; subsequent second global bending distorted analyzed taking into account effect axial force. demonstrated distribution important factor determining partitioning between phase beam. Reasonable agreement obtained experimental data published literature [Jama HH, Nurick GN, Bambach MR, Grzebieta RH, Zhao XL, Steel square sections subjected transverse loads, Thin-Walled Structures 2012;53:109–122].