The Structural Engineer > Archive > Volume 36 (1958) > Issues > Issue 1 > The Analysis of Interconnected Bridge Girders by the Distribution of Harmonics Written Disscussion o
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The Analysis of Interconnected Bridge Girders by the Distribution of Harmonics Written Disscussion on the paper by Dr. Leslie G. Jaeger, M.A., and Professor Arnold W. Hendry, Ph.D., M.I.Struct.E.. M.I.C.E

M R. K. E. ROWE referred to the Authors’ statement in their introduction that the application of the methods due to Guyon and Massonnet to bridges of longitudinal beams of different section “would undoubtedly bc, very difficult.” This was not the case, for Massonnet1 had shown that if stiffer edge beams are introduced into a bridge grillage, the edge beams having negligible torsional rigidity, then the introduction of shear forces depending on the difference in flexural stiffness between the edge and internal beams yields two simple simultaneous equations for deflexion compatibility from which the deflexion and moment profiles can be obtained. This method had been extended to cover the effect of torsion. Some complexity did arise in this case but with the calculation and presentation in graphical form of the various influence coefficients tlle work could be reduced considerably and should be suitable for design purposes.