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This paper presents a method of determining influence lines involving the use of Mûller-Breslau's principle and the direct distribution of deformation. The method is applicable, generally, to continuous beams, symmetrical or unsymmetrical frames, and structures with prismatic or non-prismatic members.
This paper presents an extension of the Cross method of moment distribution to the analysis of continuous frames with members having hinges located between supports. General expressions for the stiffness, carry-over factor and fixed-end moments are derived for members with variable moment of inertia. Numerical examples are given to illustrate the procedure of analysis.
S.L. Lee, R.S. Harwell and F.P. Wiesinger
The virtual work equation by which flexural deformations are related has been corrected to allow for the effect of axial compressive forces. These corrections can be applied wherever the end moments on an axially loaded member are defined and are particularly useful in the determination of the elastic critical loads of structural
systems by reiterative numerical methods.