Forces in Trusses: Tips for Finding Forces in Members

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SUMMARY

The discussion focuses on analyzing forces in trusses, specifically regarding the relationship between reaction forces and member forces. The user inquires whether the force Ay at point A directly correlates to the force in member AE, which is confirmed as correct. However, the assumption that the force in member EF equals Ex is challenged due to the presence of member BE, which also contributes to the joint's force analysis. This highlights the importance of considering all members framing into a joint when determining forces in truss structures.

PREREQUISITES
  • Understanding of static equilibrium in structures
  • Familiarity with truss analysis techniques
  • Knowledge of reaction forces and their components
  • Ability to interpret force diagrams and free-body diagrams
NEXT STEPS
  • Study the method of joints for truss analysis
  • Learn about the role of reaction forces in static systems
  • Explore the concept of internal forces in truss members
  • Review examples of force analysis in complex truss structures
USEFUL FOR

Engineering students, structural engineers, and anyone involved in analyzing or designing truss systems will benefit from this discussion.

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Look at the bottom problem at this page:

http://physics.uwstout.edu/StatStr/statics/StatII/statp22t2.htm

When I have found the force Ay (the y-component of the reaction force at point A), does that in this case mean that the force in member AE is then equal to this? If so, then the force in member EF is equal to Ex, correct? Or?

Any tips appreciated...
 
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The first part is right about AE but you can't assume EF=Ex because there is also member BE framing into the joint you have to analyze.
 
Ah, yes. I've got it now, thanks haynewp!
 

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