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...Nd mechanics of structures year mechanical engineering cairo university matrix structural analysis the stiffness method axial bars dim input data temperature effect degrees freedom basic steps in example properties bar an alternative derivation element truss elements beam outline how to derive distributed loads symmetry plane frames global versus local axes a practical comments references appendix formulas analyses solve problems trusses beams and is currently most common technique because it amenable computer programming important understand works this document essentially brief introduction known as finite particularly when applied continuum solid components for their simplicity are useful illustrating we will show be inputted program fig shows axially loaded let p kn mm l adc cb e gpa typical should calculate x displacement u all points named nodes d c b displacements advance simply each equal zero therefore reaction forces transmitted through moreover normal stresses at segments ad...