Guide G 3 Structural action in steel box girders

Publication Year

1977

Document Status

Archived

Abstract

A discussion of linear elastic analysis of box girders shows how it can be used to determine shear lag, torsional warping, stresses due to distortion, stresses in multi-box systems, and the limits of elastic behaviour. Next, elastic buckling and post-buckling of plates, caused by longitudinal compression and shear, are dealt with. The determination of buckling strength of panels and webs stiffened by flange plates is explained. Stress distribution in bearing diaphragms is discussed, and the reasons for failure are given. Secondary stresses caused by interaction between flanges and diaphragms, and due to restraint of warping, are explained. The effect of imperfections and residual welding stresses is discussed. Finally, general considerations in applying structural analysis to design in relation to the Merrison Rules are presented.

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