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Introduction to Stiffness Analysis

11 The Stiffness method of Analysis is the basis of all commercial structural Analysis of this chapter will be development of Stiffness equations that only take into account bending deformations, , ignore axial member, slope-deflection the Stiffness method of Analysis , we write equilibrium equationsin terms of unknown joint (node) Introduction to Stiffness Analysis2displacements. The number of unknowns in the Stiffness method of Analysis is known as the degree of kinematic indeterminacy, which refers to the number of node/joint displacements that are unknown and are needed to describe the displaced shape of the major advantageof the Stiffness method of Analysis is that the kinematic degrees of freedom are and Terminology3 Positive Sign Convention:Counterclockwise moments and rotations along with transverse forces and displacements in the positive y-axis Forces: Forces at the fixed supports of the kinema-tically determinate Forces:Calculated forces at the end of each element/ member resulting from the applied loading and deformation of the Analysis Procedure4 The steps to be followed in performing a Stiffness Analysis can be summarized as:1.

Stiffness Analysis 2 displacements. The number of unknowns in the stiffness method of analysis is known as the degree of kinematic indeterminacy, which refers to the number of node/joint displacements that are unknown and are needed to describe the displaced shape of the structure. One major advantageof the stiffness method of analysis is that

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