Natural Frequency of Curved Box Girder Bridges

by Conrad P. Heins, (M.ASCE), Prof.; Dept. of Civ. Engrg., Univ. of Maryland, College Park, Md.,
M. A. Sahin, Grad Student; Dept. of Civ. Engrg., Univ. of Maryland, College Park, Md.,

Serial Information: Journal of the Structural Division, 1979, Vol. 105, Issue 12, Pg. 2591-2600

Document Type: Journal Paper


This paper presents the results of a comprehensive study which has permitted the development of a series of empirical equations used for direct evaluation of the natural frequency of straight and curved box girders. The natural frequency of curved box girders has been obtained by utilizing a computer oriented finite difference scheme. The natural frequency results obtained from the computer program were compared to measured frequencies of a series of test bridges. Excellent correlation was observed. A parametric study was then performed on a series of simple, two and three span continuous curved bridges. The results from this parametric study permitted development of a simplified natural frequency equation.

Subject Headings: Girder bridges | Natural frequency | Curvature | Box girders | Bridge tests | Parameters (statistics) | Continuous bridges | Case studies

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