Extra Credit

Initializations

Input

a) Node Points:  

b) Element Connectivity:  

c) Element Properties:  

Cross-sectional properties, and the modulus of each element are rovided in a list of length ne in which the first entry is the area of the member and the second is the Young's modulus of the material.

d) Graphical Representation of the Input (Numeric Data Only):  

Element Stiffness Matrices and Global Stiffness Matrix

a) Direction Cosines:  

b) Element Stiffness Matrices:  

c) Global Stiffness Matrix:  

Nodal Restraints and Reduced Global Stiffness Matrix

Nodal Forces and Solution

The unknowns of the problem are the displacements at those nodes that are free to move. To solve for the unknown displacements, , }, set up the system,

Structural Configuration

It is also possible to show the deformed shape of the structure by adding the nodal displacements to the node point locations.