Consider, for example, the two-member plane frame. This process is experimental and the keywords may be updated as the learning algorithm improves. Displacement method of analysis (also known as stiffness matrix method). These keywords were added by machine and not by the authors. It is now recognized that all of the methods of structural analysis are based on either a stiffness approach or a flexibility approach, but this was not widely accepted until the advent of the digital computer which prompted further investigative work. During the latter part of the last century and the early part of this century, methods of structural analysis proliferated. Remove enough redundant to form a determinate, stable structure (this is the primary or released structure). Obviously, certain problems are solved more directly by one method than by the other, but the fact remains that the alternative method is available. This is sometimes referred to as the ‘duality’ of structural analysis and it is frequently useful for a student to study the dual problem. It is a feature of the analysis of structures that each technique can find expression in an alternative or dual form.
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