Motion of Suspension Bridge Subject to Wind Loads

by Jean-Guy Beliveau, (A.M.ASCE), Asst. Prof. of Civ. Engrg.; Universite de Sherbrooke, Sherbrooke, Quebec, Canada,
Masanobu Shinozuka, (M.ASCE), Prof. of Civ. Engrg.; Columbia Univ., New York, N.Y.,
Rimas Vaicaitis, (M.ASCE), Assoc. Prof. of Civ. Engrg.; Columbia Univ., New York, N.Y.,

Serial Information: Journal of the Structural Division, 1977, Vol. 103, Issue 6, Pg. 1189-1205

Document Type: Journal Paper


Vertical and torsional motions of a suspension bridge due to wind loading are studied. Both, self-excited, due to bridge motion, and buffeting, independent of bridge motion, wind loads are included. The self-excited aerodynamic forces are modeled using aerodynamic coefficient or Duhamel integral formulations. For this purpose, experimental information on section models from wind tunnel testing is utilized. The buffeting random loads are determined from specified spectral densities or horizontal and vertical turbulent wind velocity fluctuations. Numerical results are obtained using frequency and time domain formulations. Dynamic bridge stability is also investigated.

Subject Headings: Suspension bridges | Wind loads | Motion (dynamics) | Suspended loads | Load factors | Vertical loads | Aerodynamics | Torsion

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