Failure Tests of Rectangular Model Steel Box Girders

by Joseph A. Corrado, (A.M.ASCE), Struct. Engr.; Dept. of Struct. Mech., Naval Ship R&D Ctr., Bethesda, MD,
Ben T. Yen, (M.ASCE), Assoc. Prof.; Civ. Engrg. Dept., Lehigh Univ., Bethlehem, PA,

Serial Information: Journal of the Structural Division, 1973, Vol. 99, Issue 7, Pg. 1439-1455

Document Type: Journal Paper


Model tests were successfully utilized to obtain information on the behavior, modes of failure, and load-carrying capacity of single span rectangular steel box girders. This study, which involved the testing of two slender-web steel model box girders under different combinations of bending, shear, and torsion, provides insight into the post-buckling behavior of such members. The test specimens were designed to simulate box girder bridge members having a concrete or orthotropic steel deck. When subjected to only shear and bending, the specimen exhibited a behavior quite like that of slender-web plate girders under similar loading conditions. The addition of torsion had a significant effect on the behavior of the specimens. For all conditions of loading the specimens displayed definite stress redistribution capabilities and considerable post-buckling strength. Failure modes were characterized by tension field yielding of the webs and out-of-plane deformations of the flanges.

Subject Headings: Material failures | Failure analysis | Structural failures | Steel | Box girders | Failure modes | Load bearing capacity | Bending (structural)

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