An Analytical and Experimental Study of Helicoidal Girders

by Y. F. Young,
A. C. Scordelis,

Serial Information: Journal of the Structural Division, 1958, Vol. 84, Issue 5, Pg. 1-29

Document Type: Journal Paper


A study of the helicoidal girder, fixed at the ends, subtending a horizontal angle of 180 degrees, and having a slope of 30 degrees is presented. Four girders, each having a different uniform rectangular cross-section throughout its length, are investigated. The determination of influence lines for end reactions due to vertical load is illustrated using analytical and experimental methods and final results are presented in tabulated and graphical form. End reactions under uniform load over half and full span are also given. The effect of width-depth ratio of cross-section on end reactions and internal forces is discussed.

Subject Headings: Vertical loads | Girders | Cross sections | Load factors | Slopes | Graphic methods

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