WOLFRAM NOTEBOOK

Determine if a Truss Can Be Solved

This Demonstration determines whether a truss can be solved or if it is statically indeterminate by calculating the number of equations and the number of unknowns. Use buttons to make joints either rollers (one reaction force) or pinned (two reaction forces). Eliminate joint
B
by unchecking "support at joint
B
". The number of members, joints and reaction forces is shown above the truss. Check "joint labels" to show labels for each joint. The point load forces are green (known forces) and the reaction forces (unknown forces) are blue.

Details

To determine if the truss can be solved or not, a degree of freedom analysis is done:
DOF=2j-u
,
where
DOF
is degrees of freedom,
j
is the number of joints, and
u
is the number of unknowns; and
u=m+r
, where
m
is the number of members, and
r
is the number of unknown reaction forces.

External Links

Permanent Citation

Rachael L. Baumann, John L. Falconer
​
​"Determine if a Truss Can Be Solved"​
​http://demonstrations.wolfram.com/DetermineIfATrussCanBeSolved/​
​Wolfram Demonstrations Project​
​Published: January 19, 2018
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