Simultaneous Airblast and Ground Motion Response

A single-degree-of-freedom approach is used to model structural response to superimposed airblast and ground vibration from conventional explosions. A method is used whereby the force applied to the structure by the airblast is combined with the force due to the ground motion into a single exciting force. The use of field data permits comparison of model response to actual measured structural response. Natural frequencies and damping values used in this study are typical values obtained for residential structures in other studies. The model response is similar to the actual response in frequency content, and the peak velocities are predicted within a factor of two.