Proposed Specifications for Steel Box Girder Bridges

by Roman Wolchuk, (F.ASCE), Partner; Wolchuk, Mayrbaul and Lally, Consulting Engrs., Inc New York, N.Y.,

Serial Information: Journal of the Structural Division, 1980, Vol. 106, Issue 12, Pg. 2463-2474

Document Type: Journal Paper

Discussion: Troitsky M. S. (See full record)
Discussion: Thoman Steve (See full record)
Closure: (See full record)

Abstract: Proposed design specifications for steel box girder highway bridges are based on ultimate design approch. For design of unstiffened compression flanges a new strength curve is proposed considering the effects of residual stresses and geometric imperfections. Stiffened bottom compression flanges are designed by an interaction diagram giving the strength as a function of the column slenderness of the longitudinal stiffeners and the plate slenderness of the flange plate. Strength of webs is obtained as a sum of elastic buckling strength and a lower limit of tension field strength. Also given are design rules for other box girder members, fabrication tolerances and erection provisions. Attention is called to desirability of adjustment of load factors to be used with the new design rules.

Subject Headings: Bridge design | Structural strength | Steel bridges | Girder bridges | Ultimate strength | Highway and road design | Box girders | Flanges |

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