The Structural Engineer > Archive > Volume 36 (1958) > Issues > Issue 1 > Generalized Slope-Deflection and Moment Distribution Methods for the Analysis of Viaducts and Multi-
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Generalized Slope-Deflection and Moment Distribution Methods for the Analysis of Viaducts and Multi-bay, Ridged Portal Frames

THIS paper introduces two new methods of structural analysis for the single-storey, multi-bay frame. The first, the generalized slope-deflection method, is developed from a consideration of the flexural properties of the curved (or bent) structural member. It is, however, restricted in its application here to those “linear” structures in which the connecting eaves joints are only able to rotate and displace horizontally. The second, the generalized moment distribution method, is developed from this first method, and is restricted to the same type of structure. It is based upon the physical conception of allowing the various eaves joints, in turn, both to rotate and displace horizontally together, so that the out-of-balance moments and thrusts are successively eliminated at these joints. E. Lightfoot

Author(s): Lightfoot, E

Keywords: analysis;portal frames;approximate methods;curved