Finding displacement at a point in truss

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SUMMARY

The discussion centers on calculating displacement at a point in a truss using the virtual work method. The values +1.33, -1.67, and +1 represent the internal forces (µ) in each truss member when a unit load is applied at joint E. Positive values indicate tension, while negative values indicate compression. Understanding these values is crucial for analyzing truss behavior under load.

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  • Understanding of truss structures and their components
  • Familiarity with the virtual work method for structural analysis
  • Knowledge of internal forces in truss members
  • Basic principles of statics and equilibrium
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Structural engineers, civil engineering students, and anyone involved in analyzing truss systems and their displacements under load.

fonseh
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Homework Statement


For the circled part , how to get the +1.33 , -1.67 , +1 ? What are they ? Are they the µ ?

Homework Equations

The Attempt at a Solution


What is µ ? How to get the value ? It's not stated in my book though
 

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fonseh said:

Homework Statement


For the circled part , how to get the +1.33 , -1.67 , +1 ? What are they ? Are they the µ ?

Homework Equations

The Attempt at a Solution


What is µ ? How to get the value ? It's not stated in my book though
I would be surprised if it wasn't stated in your book. Your attempt is a question, not an attempt. The value of u is the dimensionless ''force' in each member when a unit load of 1 (dimensionless) is applied at the given joint in the direction of the displacement you want to calculate for that joint. You should now make an attempt to understand the given solution.
 
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The method used here is the virtual work method for trusses and mu are the internal force in each member due to a unit load of 1 applied at point E.
Positive values indicate that the member is under tension forces, negative under compression forces
 
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