The Structural Engineer > Archive > Volume 54 (1976) > Issues > Issue 8 > Discussion on Shear Lag in Steel Box Girder Bridges by K.R. Moffatt and P.J. Dowling
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Discussion on Shear Lag in Steel Box Girder Bridges by K.R. Moffatt and P.J. Dowling

Mr. C. W. Brown (M), Freeman Fox & Partners: The phenomenon of shear lag is one that until recently has been at best imperfectly understood. Manual methods of estimating its effect were very complicated to apply and were applicable only to highly idealised cross sections and loading conditions. Certain simplified empirical rules were proposed in some Codes, but the authors' paper describes the first real attempt to provide comprenehsive but comparatively simple rules. This, of course, has only been made possible by the availability of powerful finite element computer programs, and the authors deserve great credit for their presentation of a vast amount of information in four straightforward Tables (7(a) to (d)).