STRUCTURAL INFLUENCE COEFFICIENTS FOR A REDUNDANT SYSTEM INCLUDING BEAM-COLUMN EFFECTS: ANALYTICAL DEVELOPMENT AND COMPUTATIONAL PROCEDURE.

Abstract : A Force Methid is presented for the solution of the internal load distribution, structural influence coefficients, and buckling characteristics of a redundant elastic beam system including beam-column effects. The formulation is general to the extent of considering each structural element to be subject to bending, torsion, shear, and axial deformations. An iterative procedure is developed for the analysis of the most general redundant case in which beam-column effects cause interaction between the external loading and the redundant internal reactions. The Aerospace IBM 7090/7094 Computer Program No. ES 057A provides the solution for a system composed of as many as 50 structural elements having a degree of redundancy up to 25 and loaded at up to 50 control points. The internal load distribution may be determined for 20 sets of external loadings. In addition to the printed output, the structural influence coefficients are provided in a punched-card format suitable for use in vibration and aeroelastic analyses, and the final internal load distribution matrices may be provided in an optional punched-card format suitable for use in stress analysis. (Author)