Analyzing Member Forces in a Truss

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Discussion Overview

The discussion revolves around the terminology and definitions related to member forces in a truss, specifically whether support reactions are considered member forces. Participants are seeking clarification on the distinction between member forces and support reactions in the context of a homework problem involving truss analysis.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant asks if member forces are defined as forces that act along the axis of the member, suggesting that support reactions should not be classified as member forces.
  • Another participant confirms that member forces are indeed considered axial forces.
  • A participant expresses concern about terminology differences from previous coursework and seeks reassurance that their understanding aligns with the current discussion.
  • There is a reiteration of the idea that in the context of the truss, member force is equivalent to axial force.

Areas of Agreement / Disagreement

Participants generally agree that member forces are equivalent to axial forces, but there is some uncertainty regarding the classification of support reactions.

Contextual Notes

The discussion highlights potential confusion arising from differing terminologies used in different courses, which may affect participants' understanding of the concepts.

vileoxidation
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Homework Statement



Determine all the member forces in the truss shown below, and identify tension/compression for each member.



I know there was more to what I was supposed to put here, but I really only have a terminology question. I know that I have to determine all of the reactions at any supports, but what I am confused about is if these are considered member forces. The only thing that is called a "member force" is a force that acts along the axis of the member, correct? So then support reactions are not considered member forces, right?

Thanks for any help!
 
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Okay, so member force = axial force, right?

Sorry for the really stupid questions! I am taking a continuation of a course from last year and the teacher uses different terminology, so I don't want to lose any points because of terminology.

And thank you, again!
 
vileoxidation said:
Okay, so member force = axial force, right?

Sorry for the really stupid questions! I am taking a continuation of a course from last year and the teacher uses different terminology, so I don't want to lose any points because of terminology.

And thank you, again!

In the case of your truss, member force = axial force, as you stated, right.
 

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