Gravity and Dynamic Response of Vertical Beams

by Bruce D. Westermo, Asst. Prof.; Dept. of Civ. Engrg., San Diego State Univ., San Diego, Calif. 92182,

Serial Information: Journal of the Engineering Mechanics Division, 1981, Vol. 107, Issue 5, Pg. 917-934

Document Type: Journal Paper


The influence of the gravity forces upon the steady state and transient dynamic response of vertical beams is examined. Both the shear and Euler-Bernoulli (moment) type of beam models are reformulated with the gravity load included. The calculated response of such models show that the gravity effect lowers the resonant frequencies of the system. For transient excitations with predominant frequencies less than the fundamental frequency of the beam, the frequency response of a beam including gravity can be approximated from the nongravity response curve.

Subject Headings: Dynamic response | Beams | Transient response | Gravity loads | Gravity forces | Steady states | Moment (mechanics) | Structural models

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