Simultaneous Airblast and Ground Motion Response

by Charles H. Dowding, Assoc. Prof. of Civ. Engrg.; Northwestern Univ., Evanston, Ill. 60201,
Craig S. Fulthorpe, Grad. Student; Northwestern Univ., Evanston, Ill. 60201,
Robert T. Langan, Research Sci.; Gulf Science and Tech. Co., Dept. of Seismology, Pittsburgh, Penn.,

Serial Information: Journal of the Structural Division, 1982, Vol. 108, Issue 11, Pg. 2363-2378

Document Type: Journal Paper


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.

Subject Headings: Ground motion | Structural models | Structural response | Residential buildings | Degrees of freedom | Explosions | Field tests | Permits

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